/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=DEEPEST --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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:44:16,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:44:16,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:44:16,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:44:16,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:44:16,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:44:16,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:44:16,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:44:16,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:44:16,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:44:16,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:44:16,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:44:16,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:44:16,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:44:16,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:44:16,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:44:16,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:44:16,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:44:16,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:44:16,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:44:16,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:44:16,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:44:16,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:44:16,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:44:16,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:44:16,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:44:16,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:44:16,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:44:16,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:44:16,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:44:16,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:44:16,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:44:16,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:44:16,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:44:16,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:44:16,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:44:16,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:44:16,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:44:16,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:44:16,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:44:16,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:44:16,489 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 23:44:16,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:44:16,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:44:16,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:44:16,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:44:16,528 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:44:16,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:44:16,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:44:16,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:44:16,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:44:16,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:44:16,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:44:16,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:44:16,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:44:16,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:44:16,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:44:16,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:44:16,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:44:16,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:44:16,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:44:16,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:44:16,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:44:16,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:16,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:44:16,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:44:16,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:44:16,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:44:16,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:44:16,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:44:16,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:44:16,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:44:16,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:44:16,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:44:16,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:44:16,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:44:16,992 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:44:16,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:44:17,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad063925/e4f03e491aca41bc8c791aa6edc64e3d/FLAG0ddc19452 [2020-10-27 23:44:17,894 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:44:17,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:44:17,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad063925/e4f03e491aca41bc8c791aa6edc64e3d/FLAG0ddc19452 [2020-10-27 23:44:18,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad063925/e4f03e491aca41bc8c791aa6edc64e3d [2020-10-27 23:44:18,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:44:18,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:44:18,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:18,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:44:18,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:44:18,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34368170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18, skipping insertion in model container [2020-10-27 23:44:18,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:44:18,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:44:18,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:18,683 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:44:18,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:18,834 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:44:18,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18 WrapperNode [2020-10-27 23:44:18,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:18,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:44:18,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:44:18,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:44:18,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (1/1) ... [2020-10-27 23:44:18,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:44:18,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:44:18,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:44:18,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:44:18,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (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 23:44:19,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:44:19,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:44:19,023 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:44:19,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:44:19,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:44:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:44:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:44:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:44:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:44:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:44:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:44:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:44:19,814 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:44:19,814 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:44:19,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:19 BoogieIcfgContainer [2020-10-27 23:44:19,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:44:19,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:44:19,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:44:19,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:44:19,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:44:18" (1/3) ... [2020-10-27 23:44:19,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cd506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:19, skipping insertion in model container [2020-10-27 23:44:19,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:18" (2/3) ... [2020-10-27 23:44:19,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cd506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:19, skipping insertion in model container [2020-10-27 23:44:19,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:19" (3/3) ... [2020-10-27 23:44:19,827 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:44:19,841 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:44:19,847 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:44:19,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:44:19,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:44:19,901 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:44:19,901 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:44:19,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:44:19,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:44:19,902 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:44:19,902 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:44:19,902 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:44:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-27 23:44:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:44:19,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:19,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:19,938 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1557269899, now seen corresponding path program 1 times [2020-10-27 23:44:19,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:19,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434355218] [2020-10-27 23:44:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:25,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:25,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:44:25,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:44:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:44:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 23:44:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:44:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:44:25,659 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:44:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:25,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:25,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:25,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:25,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:25,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:44:25,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:25,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:25,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:25,734 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 23:44:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434355218] [2020-10-27 23:44:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:25,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:25,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646067734] [2020-10-27 23:44:25,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:25,774 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 4 states. [2020-10-27 23:44:26,099 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:44:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:27,062 INFO L93 Difference]: Finished difference Result 256 states and 415 transitions. [2020-10-27 23:44:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:27,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 23:44:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:27,077 INFO L225 Difference]: With dead ends: 256 [2020-10-27 23:44:27,077 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 23:44:27,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 23:44:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-10-27 23:44:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 23:44:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 265 transitions. [2020-10-27 23:44:27,152 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 265 transitions. Word has length 67 [2020-10-27 23:44:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:27,153 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 265 transitions. [2020-10-27 23:44:27,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:44:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 265 transitions. [2020-10-27 23:44:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:44:27,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:27,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:27,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:44:27,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash -306144703, now seen corresponding path program 1 times [2020-10-27 23:44:27,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:27,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861364701] [2020-10-27 23:44:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:32,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:44:32,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:44:32,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:44:32,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:44:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:32,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:44:32,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:32,538 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:44:32,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:32,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:32,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:32,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:44:32,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:32,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:32,601 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 23:44:32,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861364701] [2020-10-27 23:44:32,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:32,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:44:32,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236341582] [2020-10-27 23:44:32,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:44:32,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:44:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:44:32,617 INFO L87 Difference]: Start difference. First operand 186 states and 265 transitions. Second operand 7 states. [2020-10-27 23:44:32,839 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:44:33,643 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:44:33,936 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 23:44:34,205 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:44:34,461 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:44:35,383 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:44:35,607 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:44:36,042 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:44:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:36,097 INFO L93 Difference]: Finished difference Result 1071 states and 1631 transitions. [2020-10-27 23:44:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:44:36,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-27 23:44:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:36,106 INFO L225 Difference]: With dead ends: 1071 [2020-10-27 23:44:36,107 INFO L226 Difference]: Without dead ends: 931 [2020-10-27 23:44:36,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-27 23:44:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 428. [2020-10-27 23:44:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-27 23:44:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 638 transitions. [2020-10-27 23:44:36,173 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 638 transitions. Word has length 69 [2020-10-27 23:44:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:36,174 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 638 transitions. [2020-10-27 23:44:36,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:44:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 638 transitions. [2020-10-27 23:44:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:44:36,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:36,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:36,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:44:36,182 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 141757832, now seen corresponding path program 1 times [2020-10-27 23:44:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:36,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696870903] [2020-10-27 23:44:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:41,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:44:41,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:44:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:44:41,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:44:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:44:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:44:41,665 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-27 23:44:41,937 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:44:41,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:41,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:41,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:41,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:41,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:44:41,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:41,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:41,981 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 23:44:41,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696870903] [2020-10-27 23:44:41,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:41,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:41,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696398988] [2020-10-27 23:44:41,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:41,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:41,984 INFO L87 Difference]: Start difference. First operand 428 states and 638 transitions. Second operand 10 states. [2020-10-27 23:44:42,376 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:44:43,549 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:44:46,017 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:44:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:46,298 INFO L93 Difference]: Finished difference Result 2201 states and 3352 transitions. [2020-10-27 23:44:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:44:46,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 23:44:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:46,314 INFO L225 Difference]: With dead ends: 2201 [2020-10-27 23:44:46,315 INFO L226 Difference]: Without dead ends: 1886 [2020-10-27 23:44:46,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:44:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-10-27 23:44:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 429. [2020-10-27 23:44:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 23:44:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 636 transitions. [2020-10-27 23:44:46,390 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 636 transitions. Word has length 70 [2020-10-27 23:44:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:46,391 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 636 transitions. [2020-10-27 23:44:46,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 636 transitions. [2020-10-27 23:44:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:44:46,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:46,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:46,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:44:46,404 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1469661390, now seen corresponding path program 1 times [2020-10-27 23:44:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:46,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995131922] [2020-10-27 23:44:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:46,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:51,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:51,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:44:51,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:44:51,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:44:51,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:44:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:44:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:51,792 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-27 23:44:52,067 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:44:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:52,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:52,106 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 23:44:52,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995131922] [2020-10-27 23:44:52,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:52,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:52,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308506534] [2020-10-27 23:44:52,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:52,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:52,108 INFO L87 Difference]: Start difference. First operand 429 states and 636 transitions. Second operand 11 states. [2020-10-27 23:44:52,250 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-27 23:44:52,521 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:44:52,809 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-27 23:44:52,950 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2020-10-27 23:44:53,645 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:44:54,919 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:44:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:55,443 INFO L93 Difference]: Finished difference Result 2771 states and 4199 transitions. [2020-10-27 23:44:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:44:55,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-27 23:44:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:55,458 INFO L225 Difference]: With dead ends: 2771 [2020-10-27 23:44:55,458 INFO L226 Difference]: Without dead ends: 2455 [2020-10-27 23:44:55,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:44:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2020-10-27 23:44:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 478. [2020-10-27 23:44:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-27 23:44:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 688 transitions. [2020-10-27 23:44:55,534 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 688 transitions. Word has length 70 [2020-10-27 23:44:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:55,534 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 688 transitions. [2020-10-27 23:44:55,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 688 transitions. [2020-10-27 23:44:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:44:55,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:55,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:55,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:44:55,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1132131651, now seen corresponding path program 1 times [2020-10-27 23:44:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:55,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014358187] [2020-10-27 23:44:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:55,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:55,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:56,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:56,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:00,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:00,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:45:00,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:45:00,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:45:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:45:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:45:00,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:00,818 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:00,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:00,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:00,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:00,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:45:00,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:00,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:00,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:00,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:00,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:00,848 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 23:45:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014358187] [2020-10-27 23:45:00,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:00,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:45:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232895202] [2020-10-27 23:45:00,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:45:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:45:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:00,850 INFO L87 Difference]: Start difference. First operand 478 states and 688 transitions. Second operand 6 states. [2020-10-27 23:45:01,073 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:01,796 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:02,010 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:02,964 INFO L93 Difference]: Finished difference Result 1962 states and 2968 transitions. [2020-10-27 23:45:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:45:02,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 23:45:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:02,974 INFO L225 Difference]: With dead ends: 1962 [2020-10-27 23:45:02,974 INFO L226 Difference]: Without dead ends: 1677 [2020-10-27 23:45:02,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:45:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2020-10-27 23:45:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 840. [2020-10-27 23:45:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-10-27 23:45:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1240 transitions. [2020-10-27 23:45:03,079 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1240 transitions. Word has length 70 [2020-10-27 23:45:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1240 transitions. [2020-10-27 23:45:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1240 transitions. [2020-10-27 23:45:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:03,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:03,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:03,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:45:03,082 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash -602899877, now seen corresponding path program 1 times [2020-10-27 23:45:03,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:03,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034287176] [2020-10-27 23:45:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:05,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:05,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:08,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 23:45:08,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:08,406 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:08,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:08,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:08,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:08,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:08,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:45:08,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:08,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:08,450 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 23:45:08,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034287176] [2020-10-27 23:45:08,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:08,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944349222] [2020-10-27 23:45:08,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:08,458 INFO L87 Difference]: Start difference. First operand 840 states and 1240 transitions. Second operand 4 states. [2020-10-27 23:45:09,080 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:09,589 INFO L93 Difference]: Finished difference Result 2044 states and 3076 transitions. [2020-10-27 23:45:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:09,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:45:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:09,597 INFO L225 Difference]: With dead ends: 2044 [2020-10-27 23:45:09,597 INFO L226 Difference]: Without dead ends: 1407 [2020-10-27 23:45:09,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-27 23:45:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2020-10-27 23:45:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-27 23:45:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2079 transitions. [2020-10-27 23:45:09,784 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2079 transitions. Word has length 70 [2020-10-27 23:45:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:09,785 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 2079 transitions. [2020-10-27 23:45:09,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2079 transitions. [2020-10-27 23:45:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:09,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:09,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:09,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:45:09,788 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 333879292, now seen corresponding path program 1 times [2020-10-27 23:45:09,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:09,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583682425] [2020-10-27 23:45:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 23:45:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:45:14,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:15,084 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:15,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:15,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:15,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:15,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:45:15,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:15,133 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 23:45:15,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583682425] [2020-10-27 23:45:15,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:15,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175367674] [2020-10-27 23:45:15,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:15,145 INFO L87 Difference]: Start difference. First operand 1404 states and 2079 transitions. Second operand 4 states. [2020-10-27 23:45:15,496 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:45:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:16,413 INFO L93 Difference]: Finished difference Result 3221 states and 4824 transitions. [2020-10-27 23:45:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:16,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:45:16,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:16,424 INFO L225 Difference]: With dead ends: 3221 [2020-10-27 23:45:16,425 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 23:45:16,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 23:45:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2017. [2020-10-27 23:45:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2017 states. [2020-10-27 23:45:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2988 transitions. [2020-10-27 23:45:16,691 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2988 transitions. Word has length 70 [2020-10-27 23:45:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:16,691 INFO L481 AbstractCegarLoop]: Abstraction has 2017 states and 2988 transitions. [2020-10-27 23:45:16,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2988 transitions. [2020-10-27 23:45:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:16,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:16,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:16,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:45:16,693 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 982857703, now seen corresponding path program 1 times [2020-10-27 23:45:16,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:16,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849190352] [2020-10-27 23:45:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:45:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:45:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:22,086 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:22,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:22,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:22,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:45:22,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:22,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:22,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:22,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:22,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:22,120 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 23:45:22,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849190352] [2020-10-27 23:45:22,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:22,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:45:22,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338528503] [2020-10-27 23:45:22,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:45:22,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:45:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:45:22,125 INFO L87 Difference]: Start difference. First operand 2017 states and 2988 transitions. Second operand 10 states. [2020-10-27 23:45:22,367 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:23,241 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:24,596 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:25,600 INFO L93 Difference]: Finished difference Result 20154 states and 30172 transitions. [2020-10-27 23:45:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:45:25,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 23:45:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:25,685 INFO L225 Difference]: With dead ends: 20154 [2020-10-27 23:45:25,685 INFO L226 Difference]: Without dead ends: 18276 [2020-10-27 23:45:25,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:45:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18276 states. [2020-10-27 23:45:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18276 to 2091. [2020-10-27 23:45:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2020-10-27 23:45:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3029 transitions. [2020-10-27 23:45:26,171 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3029 transitions. Word has length 70 [2020-10-27 23:45:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:26,172 INFO L481 AbstractCegarLoop]: Abstraction has 2091 states and 3029 transitions. [2020-10-27 23:45:26,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:45:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3029 transitions. [2020-10-27 23:45:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:26,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:26,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:45:26,177 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1665284041, now seen corresponding path program 1 times [2020-10-27 23:45:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759583970] [2020-10-27 23:45:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:45:31,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:31,443 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:31,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:31,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:31,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:45:31,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:31,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:31,474 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 23:45:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759583970] [2020-10-27 23:45:31,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:31,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483760854] [2020-10-27 23:45:31,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:31,476 INFO L87 Difference]: Start difference. First operand 2091 states and 3029 transitions. Second operand 7 states. [2020-10-27 23:45:31,725 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:32,391 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 23:45:32,609 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:32,809 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:33,014 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:34,186 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:34,403 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:45:35,139 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:45:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:35,218 INFO L93 Difference]: Finished difference Result 12364 states and 18236 transitions. [2020-10-27 23:45:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:35,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-27 23:45:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:35,240 INFO L225 Difference]: With dead ends: 12364 [2020-10-27 23:45:35,241 INFO L226 Difference]: Without dead ends: 10742 [2020-10-27 23:45:35,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10742 states. [2020-10-27 23:45:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10742 to 3437. [2020-10-27 23:45:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3437 states. [2020-10-27 23:45:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4979 transitions. [2020-10-27 23:45:35,867 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4979 transitions. Word has length 70 [2020-10-27 23:45:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:35,867 INFO L481 AbstractCegarLoop]: Abstraction has 3437 states and 4979 transitions. [2020-10-27 23:45:35,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4979 transitions. [2020-10-27 23:45:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:45:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:35,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:35,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:45:35,870 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -123953312, now seen corresponding path program 1 times [2020-10-27 23:45:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:35,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910935582] [2020-10-27 23:45:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:35,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:36,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:37,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:40,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:45:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:41,138 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:41,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:41,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:41,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:41,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:41,168 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 23:45:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910935582] [2020-10-27 23:45:41,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:41,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:45:41,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057430543] [2020-10-27 23:45:41,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:45:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:45:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:41,171 INFO L87 Difference]: Start difference. First operand 3437 states and 4979 transitions. Second operand 6 states. [2020-10-27 23:45:41,406 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:42,364 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:42,586 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:45,940 INFO L93 Difference]: Finished difference Result 24606 states and 36192 transitions. [2020-10-27 23:45:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:45:45,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:45:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:45,982 INFO L225 Difference]: With dead ends: 24606 [2020-10-27 23:45:45,982 INFO L226 Difference]: Without dead ends: 21989 [2020-10-27 23:45:45,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:45:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21989 states. [2020-10-27 23:45:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21989 to 11229. [2020-10-27 23:45:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11229 states. [2020-10-27 23:45:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 16425 transitions. [2020-10-27 23:45:47,476 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 16425 transitions. Word has length 71 [2020-10-27 23:45:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:47,476 INFO L481 AbstractCegarLoop]: Abstraction has 11229 states and 16425 transitions. [2020-10-27 23:45:47,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 16425 transitions. [2020-10-27 23:45:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:45:47,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:47,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:47,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:45:47,480 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:47,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1763858972, now seen corresponding path program 1 times [2020-10-27 23:45:47,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:47,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386942204] [2020-10-27 23:45:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:47,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:47,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:47,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:47,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:52,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:45:52,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:45:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:53,157 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:53,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:53,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:53,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:53,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:53,188 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 23:45:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386942204] [2020-10-27 23:45:53,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:53,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 23:45:53,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931338601] [2020-10-27 23:45:53,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:45:53,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:45:53,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:45:53,190 INFO L87 Difference]: Start difference. First operand 11229 states and 16425 transitions. Second operand 14 states. [2020-10-27 23:45:53,842 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 160 [2020-10-27 23:45:54,427 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-27 23:45:54,599 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 23:45:56,422 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 153 [2020-10-27 23:45:56,974 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 160 [2020-10-27 23:45:57,243 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:45:57,482 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:59,809 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 23:46:00,043 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 23:46:01,144 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-27 23:46:05,975 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 23:46:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:08,919 INFO L93 Difference]: Finished difference Result 55749 states and 80598 transitions. [2020-10-27 23:46:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 23:46:08,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-27 23:46:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:09,024 INFO L225 Difference]: With dead ends: 55749 [2020-10-27 23:46:09,024 INFO L226 Difference]: Without dead ends: 49706 [2020-10-27 23:46:09,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=586, Invalid=3320, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 23:46:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49706 states. [2020-10-27 23:46:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49706 to 11241. [2020-10-27 23:46:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11241 states. [2020-10-27 23:46:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11241 states to 11241 states and 16437 transitions. [2020-10-27 23:46:11,386 INFO L78 Accepts]: Start accepts. Automaton has 11241 states and 16437 transitions. Word has length 71 [2020-10-27 23:46:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:11,387 INFO L481 AbstractCegarLoop]: Abstraction has 11241 states and 16437 transitions. [2020-10-27 23:46:11,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 23:46:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 11241 states and 16437 transitions. [2020-10-27 23:46:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:46:11,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:11,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:11,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:46:11,391 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1568236321, now seen corresponding path program 1 times [2020-10-27 23:46:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726770972] [2020-10-27 23:46:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:46:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:16,647 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:16,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:16,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:16,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:16,675 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 23:46:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726770972] [2020-10-27 23:46:16,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:16,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:16,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531218740] [2020-10-27 23:46:16,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:16,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:16,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:16,677 INFO L87 Difference]: Start difference. First operand 11241 states and 16437 transitions. Second operand 6 states. [2020-10-27 23:46:16,908 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:17,894 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:18,168 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:28,432 INFO L93 Difference]: Finished difference Result 85286 states and 125834 transitions. [2020-10-27 23:46:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:46:28,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:46:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:28,576 INFO L225 Difference]: With dead ends: 85286 [2020-10-27 23:46:28,576 INFO L226 Difference]: Without dead ends: 74448 [2020-10-27 23:46:28,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74448 states. [2020-10-27 23:46:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74448 to 43062. [2020-10-27 23:46:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43062 states. [2020-10-27 23:46:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43062 states to 43062 states and 63281 transitions. [2020-10-27 23:46:35,755 INFO L78 Accepts]: Start accepts. Automaton has 43062 states and 63281 transitions. Word has length 71 [2020-10-27 23:46:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:35,756 INFO L481 AbstractCegarLoop]: Abstraction has 43062 states and 63281 transitions. [2020-10-27 23:46:35,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 43062 states and 63281 transitions. [2020-10-27 23:46:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:46:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:35,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:35,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:46:35,764 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -43182901, now seen corresponding path program 1 times [2020-10-27 23:46:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:35,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379655150] [2020-10-27 23:46:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:40,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:46:40,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:46:40,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:46:40,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:46:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:46:40,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,061 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:41,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:41,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:41,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:41,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:41,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,090 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 23:46:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379655150] [2020-10-27 23:46:41,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:41,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:41,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147046452] [2020-10-27 23:46:41,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:41,093 INFO L87 Difference]: Start difference. First operand 43062 states and 63281 transitions. Second operand 6 states. [2020-10-27 23:46:41,358 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:42,774 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:43,067 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:08,531 INFO L93 Difference]: Finished difference Result 198348 states and 291972 transitions. [2020-10-27 23:47:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:08,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:47:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:08,957 INFO L225 Difference]: With dead ends: 198348 [2020-10-27 23:47:08,957 INFO L226 Difference]: Without dead ends: 180068 [2020-10-27 23:47:09,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180068 states. [2020-10-27 23:47:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180068 to 70426. [2020-10-27 23:47:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70426 states. [2020-10-27 23:47:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70426 states to 70426 states and 103430 transitions. [2020-10-27 23:47:20,421 INFO L78 Accepts]: Start accepts. Automaton has 70426 states and 103430 transitions. Word has length 71 [2020-10-27 23:47:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:20,421 INFO L481 AbstractCegarLoop]: Abstraction has 70426 states and 103430 transitions. [2020-10-27 23:47:20,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70426 states and 103430 transitions. [2020-10-27 23:47:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:47:20,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:20,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:20,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:47:20,430 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash 294346838, now seen corresponding path program 1 times [2020-10-27 23:47:20,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:20,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629675726] [2020-10-27 23:47:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:20,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:25,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:47:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:47:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:47:25,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:47:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:47:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:47:25,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:25,709 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:47:25,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:25,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:25,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:25,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:25,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:25,740 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 23:47:25,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629675726] [2020-10-27 23:47:25,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:25,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:47:25,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116932965] [2020-10-27 23:47:25,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:47:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:47:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:47:25,743 INFO L87 Difference]: Start difference. First operand 70426 states and 103430 transitions. Second operand 7 states. [2020-10-27 23:47:25,997 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:47:26,879 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 23:47:27,135 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:47:27,377 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:47:27,629 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:36,275 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:47:36,639 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:47:42,695 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:47:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:45,302 INFO L93 Difference]: Finished difference Result 131664 states and 192966 transitions. [2020-10-27 23:47:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:47:45,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-27 23:47:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:45,485 INFO L225 Difference]: With dead ends: 131664 [2020-10-27 23:47:45,485 INFO L226 Difference]: Without dead ends: 116954 [2020-10-27 23:47:45,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:47:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116954 states. [2020-10-27 23:47:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116954 to 71685. [2020-10-27 23:47:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71685 states. [2020-10-27 23:47:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71685 states to 71685 states and 105281 transitions. [2020-10-27 23:47:56,587 INFO L78 Accepts]: Start accepts. Automaton has 71685 states and 105281 transitions. Word has length 71 [2020-10-27 23:47:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:56,587 INFO L481 AbstractCegarLoop]: Abstraction has 71685 states and 105281 transitions. [2020-10-27 23:47:56,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:47:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 71685 states and 105281 transitions. [2020-10-27 23:47:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:47:56,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:56,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:47:56,595 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1939096827, now seen corresponding path program 1 times [2020-10-27 23:47:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:56,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480999382] [2020-10-27 23:47:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:56,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:59,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking...