/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-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:04:04,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:04:04,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:04:04,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:04:04,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:04:04,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:04:04,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:04:04,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:04:04,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:04:04,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:04:04,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:04:04,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:04:04,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:04:04,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:04:04,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:04:04,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:04:04,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:04:04,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:04:04,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:04:04,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:04:04,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:04:04,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:04:04,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:04:04,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:04:04,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:04:04,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:04:04,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:04:04,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:04:04,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:04:04,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:04:04,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:04:04,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:04:04,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:04:04,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:04:04,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:04:04,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:04:04,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:04:04,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:04:04,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:04:04,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:04:04,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:04:04,483 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 [2020-10-28 00:04:04,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:04:04,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:04:04,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:04:04,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:04:04,542 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:04:04,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:04:04,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:04:04,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:04:04,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:04:04,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:04:04,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:04:04,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:04:04,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:04:04,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:04:04,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:04:04,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:04:04,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:04:04,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:04:04,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:04:04,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:04:04,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:04:04,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:04:04,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:04:04,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:04:04,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:04:04,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:04:04,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:04:04,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:04:04,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:04:04,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:04:04,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:04:04,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:04:04,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:04:04,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:04:04,977 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:04:04,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:04:05,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7587e9a3c/6818531f6cdb4346ac0f6ef5be750098/FLAG65a382206 [2020-10-28 00:04:05,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:04:05,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:04:05,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7587e9a3c/6818531f6cdb4346ac0f6ef5be750098/FLAG65a382206 [2020-10-28 00:04:06,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7587e9a3c/6818531f6cdb4346ac0f6ef5be750098 [2020-10-28 00:04:06,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:04:06,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:04:06,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:04:06,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:04:06,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:04:06,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba20cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06, skipping insertion in model container [2020-10-28 00:04:06,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:04:06,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:04:06,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:04:06,545 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:04:06,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:04:06,671 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:04:06,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06 WrapperNode [2020-10-28 00:04:06,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:04:06,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:04:06,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:04:06,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:04:06,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (1/1) ... [2020-10-28 00:04:06,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:04:06,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:04:06,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:04:06,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:04:06,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (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 [2020-10-28 00:04:06,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:04:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:04:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:04:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:04:06,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:04:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:04:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:04:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:04:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:04:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:04:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:04:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:04:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:04:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:04:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:04:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:04:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:04:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:04:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:04:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:04:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:04:06,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:04:06,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:04:07,905 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:04:07,905 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:04:07,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:04:07 BoogieIcfgContainer [2020-10-28 00:04:07,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:04:07,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:04:07,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:04:07,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:04:07,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:04:06" (1/3) ... [2020-10-28 00:04:07,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5083cfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:04:07, skipping insertion in model container [2020-10-28 00:04:07,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:06" (2/3) ... [2020-10-28 00:04:07,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5083cfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:04:07, skipping insertion in model container [2020-10-28 00:04:07,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:04:07" (3/3) ... [2020-10-28 00:04:07,916 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:04:07,929 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:04:07,934 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:04:07,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:04:07,975 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:04:07,975 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:04:07,976 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:04:07,976 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:04:07,976 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:04:07,976 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:04:07,976 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:04:07,976 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:04:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-28 00:04:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:04:08,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:08,007 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] [2020-10-28 00:04:08,007 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-28 00:04:08,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:08,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882708069] [2020-10-28 00:04:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:08,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:08,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:04:10,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:04:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2075 [2020-10-28 00:04:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:04:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:04:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:04:10,627 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:10,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:10,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:10,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:10,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:04:10,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:10,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882708069] [2020-10-28 00:04:10,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:10,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:10,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619674264] [2020-10-28 00:04:10,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:10,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:10,705 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-28 00:04:10,908 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:04:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:11,699 INFO L93 Difference]: Finished difference Result 321 states and 516 transitions. [2020-10-28 00:04:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:11,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:04:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:11,713 INFO L225 Difference]: With dead ends: 321 [2020-10-28 00:04:11,714 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 00:04:11,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 00:04:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-28 00:04:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 00:04:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-28 00:04:11,786 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 54 [2020-10-28 00:04:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-28 00:04:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-28 00:04:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:04:11,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:11,790 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] [2020-10-28 00:04:11,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:04:11,790 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1142379061, now seen corresponding path program 1 times [2020-10-28 00:04:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863520712] [2020-10-28 00:04:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:11,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:16,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:04:16,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:04:16,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:04:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:04:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:17,018 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:17,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:17,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:17,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:04:17,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:17,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:17,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863520712] [2020-10-28 00:04:17,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:17,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:17,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207252491] [2020-10-28 00:04:17,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:17,059 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-28 00:04:17,217 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:04:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:17,847 INFO L93 Difference]: Finished difference Result 574 states and 879 transitions. [2020-10-28 00:04:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:17,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:04:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:17,852 INFO L225 Difference]: With dead ends: 574 [2020-10-28 00:04:17,852 INFO L226 Difference]: Without dead ends: 407 [2020-10-28 00:04:17,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-28 00:04:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2020-10-28 00:04:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-28 00:04:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 607 transitions. [2020-10-28 00:04:17,909 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 607 transitions. Word has length 57 [2020-10-28 00:04:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:17,910 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 607 transitions. [2020-10-28 00:04:17,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 607 transitions. [2020-10-28 00:04:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:04:17,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:17,913 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] [2020-10-28 00:04:17,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:04:17,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -915987511, now seen corresponding path program 1 times [2020-10-28 00:04:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477514349] [2020-10-28 00:04:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:17,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:22,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:22,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:04:22,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4924 [2020-10-28 00:04:22,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:04:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:04:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:23,041 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:23,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:23,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:23,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:23,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:23,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477514349] [2020-10-28 00:04:23,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:23,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598456257] [2020-10-28 00:04:23,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:23,083 INFO L87 Difference]: Start difference. First operand 404 states and 607 transitions. Second operand 4 states. [2020-10-28 00:04:23,234 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:04:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:23,813 INFO L93 Difference]: Finished difference Result 978 states and 1493 transitions. [2020-10-28 00:04:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:23,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:04:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:23,818 INFO L225 Difference]: With dead ends: 978 [2020-10-28 00:04:23,818 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 00:04:23,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 00:04:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 690. [2020-10-28 00:04:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 00:04:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1033 transitions. [2020-10-28 00:04:23,895 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1033 transitions. Word has length 57 [2020-10-28 00:04:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:23,897 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1033 transitions. [2020-10-28 00:04:23,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1033 transitions. [2020-10-28 00:04:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:04:23,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:23,912 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] [2020-10-28 00:04:23,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:04:23,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:23,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1907474551, now seen corresponding path program 1 times [2020-10-28 00:04:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:23,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392408166] [2020-10-28 00:04:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:23,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:28,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:04:28,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:04:28,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:29,119 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:29,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:29,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:29,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:29,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:29,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392408166] [2020-10-28 00:04:29,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808671852] [2020-10-28 00:04:29,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:29,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:29,156 INFO L87 Difference]: Start difference. First operand 690 states and 1033 transitions. Second operand 4 states. [2020-10-28 00:04:29,303 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:04:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:30,014 INFO L93 Difference]: Finished difference Result 1766 states and 2659 transitions. [2020-10-28 00:04:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:30,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:04:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:30,022 INFO L225 Difference]: With dead ends: 1766 [2020-10-28 00:04:30,022 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 00:04:30,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 00:04:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1168. [2020-10-28 00:04:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-28 00:04:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1715 transitions. [2020-10-28 00:04:30,099 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1715 transitions. Word has length 57 [2020-10-28 00:04:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:30,099 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1715 transitions. [2020-10-28 00:04:30,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1715 transitions. [2020-10-28 00:04:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:04:30,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:30,103 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] [2020-10-28 00:04:30,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:04:30,103 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236509, now seen corresponding path program 1 times [2020-10-28 00:04:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:30,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233208349] [2020-10-28 00:04:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:30,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2850 [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:04:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:33,168 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:33,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:33,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:33,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:33,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:04:33,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:33,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:33,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233208349] [2020-10-28 00:04:33,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:33,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311573159] [2020-10-28 00:04:33,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:33,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:33,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:33,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:33,200 INFO L87 Difference]: Start difference. First operand 1168 states and 1715 transitions. Second operand 6 states. [2020-10-28 00:04:33,734 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:04:34,291 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:04:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:34,418 INFO L93 Difference]: Finished difference Result 4420 states and 6538 transitions. [2020-10-28 00:04:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:34,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:04:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:34,439 INFO L225 Difference]: With dead ends: 4420 [2020-10-28 00:04:34,439 INFO L226 Difference]: Without dead ends: 3561 [2020-10-28 00:04:34,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2020-10-28 00:04:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 1196. [2020-10-28 00:04:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2020-10-28 00:04:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1727 transitions. [2020-10-28 00:04:34,553 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1727 transitions. Word has length 58 [2020-10-28 00:04:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:34,553 INFO L481 AbstractCegarLoop]: Abstraction has 1196 states and 1727 transitions. [2020-10-28 00:04:34,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1727 transitions. [2020-10-28 00:04:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:04:34,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:34,555 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] [2020-10-28 00:04:34,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:04:34,556 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1014371839, now seen corresponding path program 1 times [2020-10-28 00:04:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:34,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123053931] [2020-10-28 00:04:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:34,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:37,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:04:37,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:37,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2594 [2020-10-28 00:04:37,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:04:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:37,405 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:04:37,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:37,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123053931] [2020-10-28 00:04:37,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:37,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442886068] [2020-10-28 00:04:37,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:37,453 INFO L87 Difference]: Start difference. First operand 1196 states and 1727 transitions. Second operand 6 states. [2020-10-28 00:04:38,126 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:04:38,705 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:04:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:38,873 INFO L93 Difference]: Finished difference Result 5050 states and 7317 transitions. [2020-10-28 00:04:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:38,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:04:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:38,895 INFO L225 Difference]: With dead ends: 5050 [2020-10-28 00:04:38,896 INFO L226 Difference]: Without dead ends: 4245 [2020-10-28 00:04:38,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2020-10-28 00:04:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 1308. [2020-10-28 00:04:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-10-28 00:04:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1847 transitions. [2020-10-28 00:04:39,026 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1847 transitions. Word has length 58 [2020-10-28 00:04:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:39,027 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 1847 transitions. [2020-10-28 00:04:39,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1847 transitions. [2020-10-28 00:04:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:04:39,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:39,029 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] [2020-10-28 00:04:39,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:04:39,029 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -388207116, now seen corresponding path program 1 times [2020-10-28 00:04:39,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:39,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273600611] [2020-10-28 00:04:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2306 [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:04:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:41,549 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:41,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:41,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:41,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:04:41,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:41,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:41,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:41,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:41,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:04:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:41,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273600611] [2020-10-28 00:04:41,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:41,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458140148] [2020-10-28 00:04:41,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:41,594 INFO L87 Difference]: Start difference. First operand 1308 states and 1847 transitions. Second operand 6 states. [2020-10-28 00:04:42,258 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:04:42,878 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:04:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:43,092 INFO L93 Difference]: Finished difference Result 6105 states and 8702 transitions. [2020-10-28 00:04:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:43,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:04:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:43,119 INFO L225 Difference]: With dead ends: 6105 [2020-10-28 00:04:43,119 INFO L226 Difference]: Without dead ends: 5258 [2020-10-28 00:04:43,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2020-10-28 00:04:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 1435. [2020-10-28 00:04:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-10-28 00:04:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1972 transitions. [2020-10-28 00:04:43,273 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1972 transitions. Word has length 58 [2020-10-28 00:04:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:43,274 INFO L481 AbstractCegarLoop]: Abstraction has 1435 states and 1972 transitions. [2020-10-28 00:04:43,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1972 transitions. [2020-10-28 00:04:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:04:43,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:43,277 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] [2020-10-28 00:04:43,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:04:43,277 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:43,278 INFO L82 PathProgramCache]: Analyzing trace with hash 929553127, now seen corresponding path program 1 times [2020-10-28 00:04:43,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:43,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227656218] [2020-10-28 00:04:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:43,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:46,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:48,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:04:48,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:48,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:04:48,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:48,539 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 23 [2020-10-28 00:04:48,716 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:48,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:48,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:48,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:48,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:48,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227656218] [2020-10-28 00:04:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:04:48,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351618290] [2020-10-28 00:04:48,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:04:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:04:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:04:48,751 INFO L87 Difference]: Start difference. First operand 1435 states and 1972 transitions. Second operand 11 states. [2020-10-28 00:04:48,961 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:04:50,009 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:04:51,782 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:04:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:51,937 INFO L93 Difference]: Finished difference Result 6097 states and 8522 transitions. [2020-10-28 00:04:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 00:04:51,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:04:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:51,961 INFO L225 Difference]: With dead ends: 6097 [2020-10-28 00:04:51,962 INFO L226 Difference]: Without dead ends: 5181 [2020-10-28 00:04:51,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-28 00:04:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2020-10-28 00:04:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 1522. [2020-10-28 00:04:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1522 states. [2020-10-28 00:04:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2074 transitions. [2020-10-28 00:04:52,154 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2074 transitions. Word has length 59 [2020-10-28 00:04:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:52,154 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 2074 transitions. [2020-10-28 00:04:52,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:04:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2074 transitions. [2020-10-28 00:04:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:04:52,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:52,157 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] [2020-10-28 00:04:52,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:04:52,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762406, now seen corresponding path program 1 times [2020-10-28 00:04:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:52,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086728755] [2020-10-28 00:04:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:57,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:57,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:04:57,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:57,468 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:57,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:57,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:57,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:57,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:57,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:04:57,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:57,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:57,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:57,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:57,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:57,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086728755] [2020-10-28 00:04:57,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:57,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:04:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36462876] [2020-10-28 00:04:57,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:04:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:04:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:04:57,512 INFO L87 Difference]: Start difference. First operand 1522 states and 2074 transitions. Second operand 11 states. [2020-10-28 00:04:57,692 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:04:59,089 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:05:00,916 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:05:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:01,278 INFO L93 Difference]: Finished difference Result 10674 states and 14918 transitions. [2020-10-28 00:05:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:05:01,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:05:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:01,314 INFO L225 Difference]: With dead ends: 10674 [2020-10-28 00:05:01,315 INFO L226 Difference]: Without dead ends: 9803 [2020-10-28 00:05:01,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:05:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2020-10-28 00:05:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 1749. [2020-10-28 00:05:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1749 states. [2020-10-28 00:05:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2367 transitions. [2020-10-28 00:05:01,554 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2367 transitions. Word has length 59 [2020-10-28 00:05:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:01,555 INFO L481 AbstractCegarLoop]: Abstraction has 1749 states and 2367 transitions. [2020-10-28 00:05:01,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:05:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2367 transitions. [2020-10-28 00:05:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:05:01,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:01,558 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] [2020-10-28 00:05:01,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:05:01,558 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 890121976, now seen corresponding path program 1 times [2020-10-28 00:05:01,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:01,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192596288] [2020-10-28 00:05:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:05:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:05:06,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:06,859 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:06,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:06,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:06,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:05:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:05:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:06,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192596288] [2020-10-28 00:05:06,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:06,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:05:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708322490] [2020-10-28 00:05:06,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:05:06,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:05:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:05:06,899 INFO L87 Difference]: Start difference. First operand 1749 states and 2367 transitions. Second operand 11 states. [2020-10-28 00:05:07,092 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:05:08,190 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:09,403 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:05:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:09,987 INFO L93 Difference]: Finished difference Result 10013 states and 14030 transitions. [2020-10-28 00:05:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:05:09,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:05:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:10,005 INFO L225 Difference]: With dead ends: 10013 [2020-10-28 00:05:10,006 INFO L226 Difference]: Without dead ends: 9094 [2020-10-28 00:05:10,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:05:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9094 states. [2020-10-28 00:05:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9094 to 1933. [2020-10-28 00:05:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2020-10-28 00:05:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2594 transitions. [2020-10-28 00:05:10,264 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2594 transitions. Word has length 59 [2020-10-28 00:05:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:10,265 INFO L481 AbstractCegarLoop]: Abstraction has 1933 states and 2594 transitions. [2020-10-28 00:05:10,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:05:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2594 transitions. [2020-10-28 00:05:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:05:10,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:10,269 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] [2020-10-28 00:05:10,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:05:10,269 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash 641760451, now seen corresponding path program 1 times [2020-10-28 00:05:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:10,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508499236] [2020-10-28 00:05:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:10,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:15,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:15,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:05:15,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:05:15,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:05:15,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:05:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:05:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:15,461 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:15,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:15,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:15,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:15,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508499236] [2020-10-28 00:05:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:05:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737453489] [2020-10-28 00:05:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:15,491 INFO L87 Difference]: Start difference. First operand 1933 states and 2594 transitions. Second operand 6 states. [2020-10-28 00:05:15,671 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:05:16,220 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:16,914 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:05:17,079 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:05:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:17,183 INFO L93 Difference]: Finished difference Result 4002 states and 5572 transitions. [2020-10-28 00:05:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:05:17,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:05:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:17,190 INFO L225 Difference]: With dead ends: 4002 [2020-10-28 00:05:17,190 INFO L226 Difference]: Without dead ends: 3287 [2020-10-28 00:05:17,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:05:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2020-10-28 00:05:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 2077. [2020-10-28 00:05:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-28 00:05:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2822 transitions. [2020-10-28 00:05:17,446 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2822 transitions. Word has length 60 [2020-10-28 00:05:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:17,446 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 2822 transitions. [2020-10-28 00:05:17,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2822 transitions. [2020-10-28 00:05:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:05:17,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:17,450 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] [2020-10-28 00:05:17,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:05:17,450 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1247822508, now seen corresponding path program 1 times [2020-10-28 00:05:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:17,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580493355] [2020-10-28 00:05:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:17,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:19,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:22,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:22,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:05:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:22,742 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 28 [2020-10-28 00:05:22,945 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:22,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:22,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:22,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580493355] [2020-10-28 00:05:22,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:22,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 00:05:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806066876] [2020-10-28 00:05:22,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:05:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:05:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:22,979 INFO L87 Difference]: Start difference. First operand 2077 states and 2822 transitions. Second operand 12 states. [2020-10-28 00:05:23,152 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:05:24,470 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:05:24,733 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:05:26,583 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:05:26,827 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:05:27,058 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:28,500 INFO L93 Difference]: Finished difference Result 15392 states and 21633 transitions. [2020-10-28 00:05:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 00:05:28,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-28 00:05:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:28,570 INFO L225 Difference]: With dead ends: 15392 [2020-10-28 00:05:28,570 INFO L226 Difference]: Without dead ends: 14138 [2020-10-28 00:05:28,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=535, Invalid=2117, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 00:05:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14138 states. [2020-10-28 00:05:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14138 to 3008. [2020-10-28 00:05:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-10-28 00:05:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4198 transitions. [2020-10-28 00:05:29,151 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4198 transitions. Word has length 60 [2020-10-28 00:05:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:29,152 INFO L481 AbstractCegarLoop]: Abstraction has 3008 states and 4198 transitions. [2020-10-28 00:05:29,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:05:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4198 transitions. [2020-10-28 00:05:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:05:29,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:29,155 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] [2020-10-28 00:05:29,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:05:29,156 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:29,156 INFO L82 PathProgramCache]: Analyzing trace with hash -690903201, now seen corresponding path program 1 times [2020-10-28 00:05:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:29,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79448024] [2020-10-28 00:05:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:29,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:33,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:05:33,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:05:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3924 [2020-10-28 00:05:33,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:05:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:05:33,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:33,264 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:33,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:33,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79448024] [2020-10-28 00:05:33,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:33,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:05:33,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676267796] [2020-10-28 00:05:33,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:33,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:33,286 INFO L87 Difference]: Start difference. First operand 3008 states and 4198 transitions. Second operand 6 states. [2020-10-28 00:05:33,442 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:05:34,330 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:34,575 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:05:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:36,764 INFO L93 Difference]: Finished difference Result 12366 states and 17792 transitions. [2020-10-28 00:05:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:05:36,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:05:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:36,785 INFO L225 Difference]: With dead ends: 12366 [2020-10-28 00:05:36,785 INFO L226 Difference]: Without dead ends: 10537 [2020-10-28 00:05:36,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:05:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10537 states. [2020-10-28 00:05:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10537 to 5114. [2020-10-28 00:05:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-28 00:05:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7220 transitions. [2020-10-28 00:05:37,633 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7220 transitions. Word has length 60 [2020-10-28 00:05:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7220 transitions. [2020-10-28 00:05:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7220 transitions. [2020-10-28 00:05:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:05:37,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:37,638 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] [2020-10-28 00:05:37,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:05:37,638 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:37,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1032494710, now seen corresponding path program 1 times [2020-10-28 00:05:37,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:37,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660388397] [2020-10-28 00:05:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:39,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:39,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:42,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:42,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:05:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:05:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:05:42,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:05:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:05:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:05:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:42,927 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2020-10-28 00:05:43,136 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:43,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:43,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:43,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660388397] [2020-10-28 00:05:43,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:43,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 00:05:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040932376] [2020-10-28 00:05:43,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:05:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:43,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:05:43,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:43,167 INFO L87 Difference]: Start difference. First operand 5114 states and 7220 transitions. Second operand 12 states. [2020-10-28 00:05:43,542 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 145 [2020-10-28 00:05:44,998 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:05:45,200 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:05:48,173 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:48,506 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:05:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:52,342 INFO L93 Difference]: Finished difference Result 36838 states and 52383 transitions. [2020-10-28 00:05:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 00:05:52,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-28 00:05:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:52,386 INFO L225 Difference]: With dead ends: 36838 [2020-10-28 00:05:52,387 INFO L226 Difference]: Without dead ends: 32907 [2020-10-28 00:05:52,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 00:05:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32907 states. [2020-10-28 00:05:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32907 to 8814. [2020-10-28 00:05:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8814 states. [2020-10-28 00:05:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 12601 transitions. [2020-10-28 00:05:54,417 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 12601 transitions. Word has length 60 [2020-10-28 00:05:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:54,418 INFO L481 AbstractCegarLoop]: Abstraction has 8814 states and 12601 transitions. [2020-10-28 00:05:54,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:05:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 12601 transitions. [2020-10-28 00:05:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:05:54,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:54,421 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] [2020-10-28 00:05:54,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:05:54,422 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806004, now seen corresponding path program 1 times [2020-10-28 00:05:54,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:54,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916492211] [2020-10-28 00:05:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:54,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:54,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:54,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:54,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:56,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:59,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:05:59,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:05:59,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4706 [2020-10-28 00:05:59,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:05:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:05:59,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:59,306 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:05:59,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:59,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:59,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:59,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916492211] [2020-10-28 00:05:59,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:59,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:05:59,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010137869] [2020-10-28 00:05:59,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:59,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:59,336 INFO L87 Difference]: Start difference. First operand 8814 states and 12601 transitions. Second operand 6 states. [2020-10-28 00:05:59,497 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:06:00,458 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:06:00,643 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:06:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:06,989 INFO L93 Difference]: Finished difference Result 43637 states and 63391 transitions. [2020-10-28 00:06:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:06:06,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:06:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:07,038 INFO L225 Difference]: With dead ends: 43637 [2020-10-28 00:06:07,038 INFO L226 Difference]: Without dead ends: 36798 [2020-10-28 00:06:07,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:06:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36798 states. [2020-10-28 00:06:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36798 to 16267. [2020-10-28 00:06:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16267 states. [2020-10-28 00:06:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16267 states to 16267 states and 23387 transitions. [2020-10-28 00:06:10,051 INFO L78 Accepts]: Start accepts. Automaton has 16267 states and 23387 transitions. Word has length 60 [2020-10-28 00:06:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:10,051 INFO L481 AbstractCegarLoop]: Abstraction has 16267 states and 23387 transitions. [2020-10-28 00:06:10,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16267 states and 23387 transitions. [2020-10-28 00:06:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:06:10,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:10,057 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] [2020-10-28 00:06:10,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:06:10,057 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1047827148, now seen corresponding path program 1 times [2020-10-28 00:06:10,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:10,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219428236] [2020-10-28 00:06:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:15,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:06:15,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:06:15,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:06:15,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:15,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:15,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:06:15,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:06:15,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:15,244 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:06:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:15,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:15,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219428236] [2020-10-28 00:06:15,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:15,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:15,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950985426] [2020-10-28 00:06:15,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:15,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:15,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:15,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:15,277 INFO L87 Difference]: Start difference. First operand 16267 states and 23387 transitions. Second operand 6 states. [2020-10-28 00:06:15,448 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:06:16,065 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:06:18,934 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:06:19,125 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:06:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:22,883 INFO L93 Difference]: Finished difference Result 49687 states and 71777 transitions. [2020-10-28 00:06:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:06:22,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-28 00:06:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:22,928 INFO L225 Difference]: With dead ends: 49687 [2020-10-28 00:06:22,928 INFO L226 Difference]: Without dead ends: 39060 [2020-10-28 00:06:22,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:06:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2020-10-28 00:06:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 21331. [2020-10-28 00:06:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21331 states. [2020-10-28 00:06:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21331 states to 21331 states and 30871 transitions. [2020-10-28 00:06:26,954 INFO L78 Accepts]: Start accepts. Automaton has 21331 states and 30871 transitions. Word has length 61 [2020-10-28 00:06:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:26,954 INFO L481 AbstractCegarLoop]: Abstraction has 21331 states and 30871 transitions. [2020-10-28 00:06:26,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 21331 states and 30871 transitions. [2020-10-28 00:06:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:06:26,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:26,960 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] [2020-10-28 00:06:26,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:06:26,960 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -388321369, now seen corresponding path program 1 times [2020-10-28 00:06:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:26,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785653696] [2020-10-28 00:06:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:31,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:31,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:06:31,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:06:31,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:32,150 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:06:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:32,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:32,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:32,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:06:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785653696] [2020-10-28 00:06:32,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:32,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244116122] [2020-10-28 00:06:32,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:32,174 INFO L87 Difference]: Start difference. First operand 21331 states and 30871 transitions. Second operand 6 states. [2020-10-28 00:06:32,350 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:06:33,255 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:06:36,328 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:06:36,496 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:06:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:41,268 INFO L93 Difference]: Finished difference Result 54173 states and 78269 transitions. [2020-10-28 00:06:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:06:41,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-28 00:06:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:41,310 INFO L225 Difference]: With dead ends: 54173 [2020-10-28 00:06:41,310 INFO L226 Difference]: Without dead ends: 43546 [2020-10-28 00:06:41,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:06:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43546 states. [2020-10-28 00:06:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43546 to 26038. [2020-10-28 00:06:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26038 states. [2020-10-28 00:06:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26038 states to 26038 states and 37792 transitions. [2020-10-28 00:06:46,094 INFO L78 Accepts]: Start accepts. Automaton has 26038 states and 37792 transitions. Word has length 61 [2020-10-28 00:06:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:46,094 INFO L481 AbstractCegarLoop]: Abstraction has 26038 states and 37792 transitions. [2020-10-28 00:06:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26038 states and 37792 transitions. [2020-10-28 00:06:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 00:06:46,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:46,100 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] [2020-10-28 00:06:46,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:06:46,100 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1355962137, now seen corresponding path program 1 times [2020-10-28 00:06:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:46,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524092805] [2020-10-28 00:06:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:46,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:46,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:47,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:51,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:06:51,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:51,316 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2020-10-28 00:06:51,514 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:06:51,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:51,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:51,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:06:51,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:51,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:51,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524092805] [2020-10-28 00:06:51,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:51,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:06:51,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236571882] [2020-10-28 00:06:51,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:06:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:06:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:51,537 INFO L87 Difference]: Start difference. First operand 26038 states and 37792 transitions. Second operand 11 states. [2020-10-28 00:06:51,833 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:06:53,431 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:06:59,199 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:07:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:25,290 INFO L93 Difference]: Finished difference Result 158638 states and 227941 transitions. [2020-10-28 00:07:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 00:07:25,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-10-28 00:07:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:25,518 INFO L225 Difference]: With dead ends: 158638 [2020-10-28 00:07:25,519 INFO L226 Difference]: Without dead ends: 147506 [2020-10-28 00:07:25,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 00:07:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147506 states. [2020-10-28 00:07:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147506 to 26047. [2020-10-28 00:07:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26047 states. [2020-10-28 00:07:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 37801 transitions. [2020-10-28 00:07:31,623 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 37801 transitions. Word has length 64 [2020-10-28 00:07:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 26047 states and 37801 transitions. [2020-10-28 00:07:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:07:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 37801 transitions. [2020-10-28 00:07:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:07:31,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:31,629 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] [2020-10-28 00:07:31,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:07:31,629 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1686294679, now seen corresponding path program 1 times [2020-10-28 00:07:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:31,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605281139] [2020-10-28 00:07:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:34,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:34,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:36,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:36,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:07:36,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:07:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:36,801 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:36,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:36,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:36,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:36,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605281139] [2020-10-28 00:07:36,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:36,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:36,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058072676] [2020-10-28 00:07:36,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:36,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:36,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:36,831 INFO L87 Difference]: Start difference. First operand 26047 states and 37801 transitions. Second operand 4 states. [2020-10-28 00:07:37,840 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:07:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:41,480 INFO L93 Difference]: Finished difference Result 30450 states and 44117 transitions. [2020-10-28 00:07:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:41,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:07:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:41,502 INFO L225 Difference]: With dead ends: 30450 [2020-10-28 00:07:41,502 INFO L226 Difference]: Without dead ends: 21005 [2020-10-28 00:07:41,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21005 states. [2020-10-28 00:07:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21005 to 21002. [2020-10-28 00:07:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2020-10-28 00:07:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 29975 transitions. [2020-10-28 00:07:45,280 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 29975 transitions. Word has length 65 [2020-10-28 00:07:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:45,280 INFO L481 AbstractCegarLoop]: Abstraction has 21002 states and 29975 transitions. [2020-10-28 00:07:45,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 29975 transitions. [2020-10-28 00:07:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:07:45,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:45,285 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] [2020-10-28 00:07:45,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:07:45,285 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1084197282, now seen corresponding path program 1 times [2020-10-28 00:07:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:45,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824836971] [2020-10-28 00:07:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking...