/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_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:30:08,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:30:08,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:30:08,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:30:08,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:30:08,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:30:08,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:30:08,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:30:08,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:30:08,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:30:08,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:30:08,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:30:08,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:30:08,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:30:08,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:30:08,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:30:08,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:30:08,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:30:08,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:30:08,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:30:08,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:30:08,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:30:08,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:30:08,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:30:08,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:30:08,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:30:08,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:30:08,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:30:08,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:30:08,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:30:08,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:30:08,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:30:08,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:30:08,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:30:08,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:30:08,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:30:08,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:30:08,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:30:08,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:30:08,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:30:08,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:30:08,900 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 00:30:08,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:30:08,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:30:08,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:30:08,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:30:08,952 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:30:08,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:30:08,952 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:30:08,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:30:08,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:30:08,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:30:08,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:30:08,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:30:08,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:30:08,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:30:08,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:30:08,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:30:08,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:30:08,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:30:08,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:30:08,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:30:08,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:30:08,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:30:08,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:30:08,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:30:08,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:30:08,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:30:08,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:30:08,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:30:08,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:30:08,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:30:09,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:30:09,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:30:09,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:30:09,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:30:09,397 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:30:09,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:30:09,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3abc3967e/2346f1e55e3847c1b1cb4e2a68d97bab/FLAG6eb6b9407 [2020-10-28 00:30:10,189 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:30:10,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:30:10,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3abc3967e/2346f1e55e3847c1b1cb4e2a68d97bab/FLAG6eb6b9407 [2020-10-28 00:30:10,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3abc3967e/2346f1e55e3847c1b1cb4e2a68d97bab [2020-10-28 00:30:10,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:30:10,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:30:10,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:30:10,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:30:10,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:30:10,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:30:10" (1/1) ... [2020-10-28 00:30:10,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42aa3e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:10, skipping insertion in model container [2020-10-28 00:30:10,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:30:10" (1/1) ... [2020-10-28 00:30:10,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:30:10,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:30:11,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:30:11,059 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:30:11,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:30:11,320 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:30:11,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11 WrapperNode [2020-10-28 00:30:11,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:30:11,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:30:11,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:30:11,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:30:11,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (1/1) ... [2020-10-28 00:30:11,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:30:11,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:30:11,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:30:11,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:30:11,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (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 00:30:11,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:30:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:30:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:30:11,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:30:11,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:30:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:30:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:30:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:30:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:30:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:30:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:30:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:30:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:30:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:30:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:30:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:30:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:30:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:30:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:30:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:30:11,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:30:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:30:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:30:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:30:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:30:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:30:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:30:12,968 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:30:12,969 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:30:12,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:30:12 BoogieIcfgContainer [2020-10-28 00:30:12,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:30:12,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:30:12,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:30:12,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:30:12,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:30:10" (1/3) ... [2020-10-28 00:30:12,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e933501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:30:12, skipping insertion in model container [2020-10-28 00:30:12,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:30:11" (2/3) ... [2020-10-28 00:30:12,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e933501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:30:12, skipping insertion in model container [2020-10-28 00:30:12,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:30:12" (3/3) ... [2020-10-28 00:30:12,982 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:30:12,994 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:30:13,007 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:30:13,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:30:13,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:30:13,054 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:30:13,054 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:30:13,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:30:13,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:30:13,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:30:13,055 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:30:13,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:30:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states. [2020-10-28 00:30:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-28 00:30:13,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:13,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:13,101 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -796746938, now seen corresponding path program 1 times [2020-10-28 00:30:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:13,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517126268] [2020-10-28 00:30:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:18,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:18,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 00:30:18,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:30:18,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 00:30:18,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:18,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:18,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:30:18,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 00:30:18,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:30:19,126 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:30:19,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:19,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:19,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:19,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:19,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:30:19,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:19,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:19,232 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 00:30:19,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517126268] [2020-10-28 00:30:19,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:19,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:19,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443622111] [2020-10-28 00:30:19,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:19,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:19,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:19,262 INFO L87 Difference]: Start difference. First operand 346 states. Second operand 4 states. [2020-10-28 00:30:19,677 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 00:30:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:21,716 INFO L93 Difference]: Finished difference Result 693 states and 1200 transitions. [2020-10-28 00:30:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:21,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-10-28 00:30:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:21,764 INFO L225 Difference]: With dead ends: 693 [2020-10-28 00:30:21,765 INFO L226 Difference]: Without dead ends: 556 [2020-10-28 00:30:21,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-28 00:30:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 553. [2020-10-28 00:30:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-28 00:30:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 826 transitions. [2020-10-28 00:30:21,911 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 826 transitions. Word has length 158 [2020-10-28 00:30:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:21,912 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 826 transitions. [2020-10-28 00:30:21,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 826 transitions. [2020-10-28 00:30:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-28 00:30:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:21,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:21,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:30:21,921 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash -113561026, now seen corresponding path program 1 times [2020-10-28 00:30:21,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:21,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663526699] [2020-10-28 00:30:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:22,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:23,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:24,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:25,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:27,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 00:30:27,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:30:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:30:27,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:30:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:30:27,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:27,425 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:30:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:27,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:27,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:27,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:27,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:30:27,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:27,540 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 00:30:27,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663526699] [2020-10-28 00:30:27,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:27,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646909822] [2020-10-28 00:30:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:27,560 INFO L87 Difference]: Start difference. First operand 553 states and 826 transitions. Second operand 5 states. [2020-10-28 00:30:29,550 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 00:30:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:30,505 INFO L93 Difference]: Finished difference Result 1606 states and 2395 transitions. [2020-10-28 00:30:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:30:30,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-28 00:30:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:30,517 INFO L225 Difference]: With dead ends: 1606 [2020-10-28 00:30:30,518 INFO L226 Difference]: Without dead ends: 1064 [2020-10-28 00:30:30,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:30:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2020-10-28 00:30:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1061. [2020-10-28 00:30:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1061 states. [2020-10-28 00:30:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1569 transitions. [2020-10-28 00:30:30,624 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1569 transitions. Word has length 158 [2020-10-28 00:30:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:30,625 INFO L481 AbstractCegarLoop]: Abstraction has 1061 states and 1569 transitions. [2020-10-28 00:30:30,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1569 transitions. [2020-10-28 00:30:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 00:30:30,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:30,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:30,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:30:30,640 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash -445543870, now seen corresponding path program 1 times [2020-10-28 00:30:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:30,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321368105] [2020-10-28 00:30:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:30,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:35,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 00:30:35,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:30:35,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 00:30:35,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:30:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 00:30:35,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:36,127 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:30:36,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:36,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:36,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:36,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:36,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:30:36,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:36,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:36,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:36,213 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 00:30:36,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321368105] [2020-10-28 00:30:36,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:36,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:36,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958221996] [2020-10-28 00:30:36,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:36,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:36,218 INFO L87 Difference]: Start difference. First operand 1061 states and 1569 transitions. Second operand 4 states. [2020-10-28 00:30:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:39,044 INFO L93 Difference]: Finished difference Result 3146 states and 4656 transitions. [2020-10-28 00:30:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:30:39,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-28 00:30:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:39,060 INFO L225 Difference]: With dead ends: 3146 [2020-10-28 00:30:39,063 INFO L226 Difference]: Without dead ends: 2108 [2020-10-28 00:30:39,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2020-10-28 00:30:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1064. [2020-10-28 00:30:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-10-28 00:30:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1573 transitions. [2020-10-28 00:30:39,155 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1573 transitions. Word has length 159 [2020-10-28 00:30:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:39,155 INFO L481 AbstractCegarLoop]: Abstraction has 1064 states and 1573 transitions. [2020-10-28 00:30:39,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1573 transitions. [2020-10-28 00:30:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 00:30:39,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:39,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:39,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:30:39,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:39,162 INFO L82 PathProgramCache]: Analyzing trace with hash -334516321, now seen corresponding path program 1 times [2020-10-28 00:30:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444450418] [2020-10-28 00:30:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:39,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:39,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:39,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:42,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:44,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:44,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 00:30:44,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:30:44,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:44,679 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:30:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:44,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:44,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:44,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:44,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:30:44,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:44,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:44,757 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 00:30:44,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444450418] [2020-10-28 00:30:44,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:44,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106136991] [2020-10-28 00:30:44,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:44,760 INFO L87 Difference]: Start difference. First operand 1064 states and 1573 transitions. Second operand 5 states. [2020-10-28 00:30:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:46,595 INFO L93 Difference]: Finished difference Result 2102 states and 3108 transitions. [2020-10-28 00:30:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:46,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-28 00:30:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:46,603 INFO L225 Difference]: With dead ends: 2102 [2020-10-28 00:30:46,603 INFO L226 Difference]: Without dead ends: 1064 [2020-10-28 00:30:46,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:30:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2020-10-28 00:30:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1061. [2020-10-28 00:30:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1061 states. [2020-10-28 00:30:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1567 transitions. [2020-10-28 00:30:46,677 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1567 transitions. Word has length 160 [2020-10-28 00:30:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:46,678 INFO L481 AbstractCegarLoop]: Abstraction has 1061 states and 1567 transitions. [2020-10-28 00:30:46,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1567 transitions. [2020-10-28 00:30:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 00:30:46,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:46,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:46,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:30:46,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1256504282, now seen corresponding path program 1 times [2020-10-28 00:30:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:46,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785683646] [2020-10-28 00:30:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:46,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:51,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 00:30:51,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:30:51,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:30:51,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:30:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 00:30:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:52,079 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:30:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:52,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:52,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:52,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:52,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:30:52,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:52,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:52,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:52,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:52,159 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 00:30:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785683646] [2020-10-28 00:30:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:52,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:52,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723426936] [2020-10-28 00:30:52,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:52,161 INFO L87 Difference]: Start difference. First operand 1061 states and 1567 transitions. Second operand 4 states. [2020-10-28 00:30:54,468 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:30:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:55,387 INFO L93 Difference]: Finished difference Result 2457 states and 3643 transitions. [2020-10-28 00:30:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:55,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-10-28 00:30:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:55,398 INFO L225 Difference]: With dead ends: 2457 [2020-10-28 00:30:55,398 INFO L226 Difference]: Without dead ends: 1562 [2020-10-28 00:30:55,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2020-10-28 00:30:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1559. [2020-10-28 00:30:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2020-10-28 00:30:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2273 transitions. [2020-10-28 00:30:55,493 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2273 transitions. Word has length 160 [2020-10-28 00:30:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:55,494 INFO L481 AbstractCegarLoop]: Abstraction has 1559 states and 2273 transitions. [2020-10-28 00:30:55,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2273 transitions. [2020-10-28 00:30:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 00:30:55,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:55,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:30:55,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:30:55,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:55,500 INFO L82 PathProgramCache]: Analyzing trace with hash -530871704, now seen corresponding path program 1 times [2020-10-28 00:30:55,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:55,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570235066] [2020-10-28 00:30:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:55,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:56,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:56,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:59,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:59,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:59,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:00,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:00,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 00:31:00,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:31:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:31:00,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:31:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 00:31:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:00,850 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:00,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:00,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:00,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:00,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:00,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:31:00,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:00,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:00,915 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 00:31:00,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570235066] [2020-10-28 00:31:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:00,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414943931] [2020-10-28 00:31:00,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:00,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:00,918 INFO L87 Difference]: Start difference. First operand 1559 states and 2273 transitions. Second operand 4 states. [2020-10-28 00:31:03,376 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:31:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:03,494 INFO L93 Difference]: Finished difference Result 3683 states and 5483 transitions. [2020-10-28 00:31:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:03,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-10-28 00:31:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:03,508 INFO L225 Difference]: With dead ends: 3683 [2020-10-28 00:31:03,509 INFO L226 Difference]: Without dead ends: 2302 [2020-10-28 00:31:03,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2020-10-28 00:31:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1985. [2020-10-28 00:31:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1985 states. [2020-10-28 00:31:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2964 transitions. [2020-10-28 00:31:03,628 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2964 transitions. Word has length 162 [2020-10-28 00:31:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:03,628 INFO L481 AbstractCegarLoop]: Abstraction has 1985 states and 2964 transitions. [2020-10-28 00:31:03,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2964 transitions. [2020-10-28 00:31:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 00:31:03,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:03,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:03,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:31:03,633 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902331, now seen corresponding path program 1 times [2020-10-28 00:31:03,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:03,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926361595] [2020-10-28 00:31:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:03,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:06,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:08,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:08,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 00:31:08,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:31:08,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:31:08,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:08,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:08,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 00:31:08,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:31:08,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:08,995 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:08,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:09,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:09,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:09,057 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 00:31:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926361595] [2020-10-28 00:31:09,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:09,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:09,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335415412] [2020-10-28 00:31:09,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:09,060 INFO L87 Difference]: Start difference. First operand 1985 states and 2964 transitions. Second operand 4 states. [2020-10-28 00:31:11,331 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:31:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:11,578 INFO L93 Difference]: Finished difference Result 4827 states and 7365 transitions. [2020-10-28 00:31:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:11,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-10-28 00:31:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:11,594 INFO L225 Difference]: With dead ends: 4827 [2020-10-28 00:31:11,594 INFO L226 Difference]: Without dead ends: 3060 [2020-10-28 00:31:11,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-10-28 00:31:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2739. [2020-10-28 00:31:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-10-28 00:31:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4182 transitions. [2020-10-28 00:31:11,769 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4182 transitions. Word has length 164 [2020-10-28 00:31:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:11,769 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4182 transitions. [2020-10-28 00:31:11,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4182 transitions. [2020-10-28 00:31:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 00:31:11,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:11,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:11,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:31:11,774 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 474765955, now seen corresponding path program 1 times [2020-10-28 00:31:11,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:11,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651019208] [2020-10-28 00:31:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:11,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:13,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:16,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:16,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 00:31:16,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:31:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:31:16,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:31:16,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:31:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 00:31:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:31:17,174 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:17,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:17,254 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 00:31:17,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651019208] [2020-10-28 00:31:17,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:17,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:31:17,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344078381] [2020-10-28 00:31:17,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:31:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:31:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:17,257 INFO L87 Difference]: Start difference. First operand 2739 states and 4182 transitions. Second operand 5 states. [2020-10-28 00:31:19,252 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 00:31:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:20,290 INFO L93 Difference]: Finished difference Result 5471 states and 8350 transitions. [2020-10-28 00:31:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:31:20,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-28 00:31:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:20,303 INFO L225 Difference]: With dead ends: 5471 [2020-10-28 00:31:20,303 INFO L226 Difference]: Without dead ends: 2757 [2020-10-28 00:31:20,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:31:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2020-10-28 00:31:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2739. [2020-10-28 00:31:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-10-28 00:31:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4178 transitions. [2020-10-28 00:31:20,487 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4178 transitions. Word has length 165 [2020-10-28 00:31:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:20,488 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4178 transitions. [2020-10-28 00:31:20,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:31:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4178 transitions. [2020-10-28 00:31:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-28 00:31:20,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:20,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:20,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:31:20,493 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1797855485, now seen corresponding path program 1 times [2020-10-28 00:31:20,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:20,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113265549] [2020-10-28 00:31:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:20,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:21,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:31:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:31:25,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:25,928 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:25,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:25,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:25,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:25,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:25,980 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 00:31:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113265549] [2020-10-28 00:31:25,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:25,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:31:25,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617656139] [2020-10-28 00:31:25,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:31:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:31:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:25,983 INFO L87 Difference]: Start difference. First operand 2739 states and 4178 transitions. Second operand 5 states. [2020-10-28 00:31:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:27,561 INFO L93 Difference]: Finished difference Result 4498 states and 6877 transitions. [2020-10-28 00:31:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:27,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-28 00:31:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:27,574 INFO L225 Difference]: With dead ends: 4498 [2020-10-28 00:31:27,574 INFO L226 Difference]: Without dead ends: 2739 [2020-10-28 00:31:27,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:31:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2020-10-28 00:31:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2739. [2020-10-28 00:31:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-10-28 00:31:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4177 transitions. [2020-10-28 00:31:27,756 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4177 transitions. Word has length 166 [2020-10-28 00:31:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:27,757 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4177 transitions. [2020-10-28 00:31:27,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:31:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4177 transitions. [2020-10-28 00:31:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 00:31:27,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:27,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:27,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:31:27,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1496928329, now seen corresponding path program 1 times [2020-10-28 00:31:27,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:27,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557548357] [2020-10-28 00:31:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:27,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:29,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:32,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:31:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:31:32,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 00:31:32,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:33,243 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:33,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:33,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:33,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:33,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:33,311 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 00:31:33,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557548357] [2020-10-28 00:31:33,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:31:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568042406] [2020-10-28 00:31:33,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:31:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:31:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:33,313 INFO L87 Difference]: Start difference. First operand 2739 states and 4177 transitions. Second operand 5 states. [2020-10-28 00:31:35,516 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 00:31:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:36,809 INFO L93 Difference]: Finished difference Result 7736 states and 11843 transitions. [2020-10-28 00:31:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:31:36,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-28 00:31:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:36,834 INFO L225 Difference]: With dead ends: 7736 [2020-10-28 00:31:36,834 INFO L226 Difference]: Without dead ends: 5255 [2020-10-28 00:31:36,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:31:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2020-10-28 00:31:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 5252. [2020-10-28 00:31:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5252 states. [2020-10-28 00:31:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 7933 transitions. [2020-10-28 00:31:37,228 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 7933 transitions. Word has length 167 [2020-10-28 00:31:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:37,229 INFO L481 AbstractCegarLoop]: Abstraction has 5252 states and 7933 transitions. [2020-10-28 00:31:37,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:31:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 7933 transitions. [2020-10-28 00:31:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 00:31:37,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:37,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:37,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:31:37,236 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash 372063592, now seen corresponding path program 1 times [2020-10-28 00:31:37,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:37,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143633033] [2020-10-28 00:31:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:38,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:42,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:31:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:42,574 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:42,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:42,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:42,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:42,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:42,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:42,666 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 00:31:42,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143633033] [2020-10-28 00:31:42,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:42,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:42,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932213735] [2020-10-28 00:31:42,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:42,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:42,669 INFO L87 Difference]: Start difference. First operand 5252 states and 7933 transitions. Second operand 4 states. [2020-10-28 00:31:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:45,819 INFO L93 Difference]: Finished difference Result 15551 states and 23511 transitions. [2020-10-28 00:31:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:31:45,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-28 00:31:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:45,851 INFO L225 Difference]: With dead ends: 15551 [2020-10-28 00:31:45,852 INFO L226 Difference]: Without dead ends: 10436 [2020-10-28 00:31:45,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10436 states. [2020-10-28 00:31:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10436 to 5262. [2020-10-28 00:31:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5262 states. [2020-10-28 00:31:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5262 states to 5262 states and 7943 transitions. [2020-10-28 00:31:46,328 INFO L78 Accepts]: Start accepts. Automaton has 5262 states and 7943 transitions. Word has length 168 [2020-10-28 00:31:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:46,328 INFO L481 AbstractCegarLoop]: Abstraction has 5262 states and 7943 transitions. [2020-10-28 00:31:46,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5262 states and 7943 transitions. [2020-10-28 00:31:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 00:31:46,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:46,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:46,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:31:46,336 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -373357447, now seen corresponding path program 1 times [2020-10-28 00:31:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017457788] [2020-10-28 00:31:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:46,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:49,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:49,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:51,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:31:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:51,725 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:31:51,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:51,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:51,819 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 00:31:51,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017457788] [2020-10-28 00:31:51,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:51,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689588317] [2020-10-28 00:31:51,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:51,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:51,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:51,821 INFO L87 Difference]: Start difference. First operand 5262 states and 7943 transitions. Second operand 4 states. [2020-10-28 00:31:54,213 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:31:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:55,539 INFO L93 Difference]: Finished difference Result 13598 states and 20550 transitions. [2020-10-28 00:31:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:55,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-10-28 00:31:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:55,559 INFO L225 Difference]: With dead ends: 13598 [2020-10-28 00:31:55,559 INFO L226 Difference]: Without dead ends: 8748 [2020-10-28 00:31:55,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8748 states. [2020-10-28 00:31:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8748 to 8745. [2020-10-28 00:31:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8745 states. [2020-10-28 00:31:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8745 states to 8745 states and 12995 transitions. [2020-10-28 00:31:56,392 INFO L78 Accepts]: Start accepts. Automaton has 8745 states and 12995 transitions. Word has length 169 [2020-10-28 00:31:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:56,393 INFO L481 AbstractCegarLoop]: Abstraction has 8745 states and 12995 transitions. [2020-10-28 00:31:56,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8745 states and 12995 transitions. [2020-10-28 00:31:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 00:31:56,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:56,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:31:56,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:31:56,403 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1796513852, now seen corresponding path program 1 times [2020-10-28 00:31:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:56,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942795314] [2020-10-28 00:31:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:56,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:32:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:32:01,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:01,798 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:01,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:01,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:01,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:01,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:01,841 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 00:32:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942795314] [2020-10-28 00:32:01,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:01,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:32:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554968673] [2020-10-28 00:32:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:32:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:32:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:01,843 INFO L87 Difference]: Start difference. First operand 8745 states and 12995 transitions. Second operand 5 states. [2020-10-28 00:32:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:03,660 INFO L93 Difference]: Finished difference Result 15919 states and 23798 transitions. [2020-10-28 00:32:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:03,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-28 00:32:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:03,680 INFO L225 Difference]: With dead ends: 15919 [2020-10-28 00:32:03,680 INFO L226 Difference]: Without dead ends: 7546 [2020-10-28 00:32:03,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2020-10-28 00:32:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 7546. [2020-10-28 00:32:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7546 states. [2020-10-28 00:32:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7546 states to 7546 states and 11233 transitions. [2020-10-28 00:32:04,311 INFO L78 Accepts]: Start accepts. Automaton has 7546 states and 11233 transitions. Word has length 169 [2020-10-28 00:32:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:04,311 INFO L481 AbstractCegarLoop]: Abstraction has 7546 states and 11233 transitions. [2020-10-28 00:32:04,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:32:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7546 states and 11233 transitions. [2020-10-28 00:32:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 00:32:04,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:04,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:04,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:32:04,318 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash -132953805, now seen corresponding path program 1 times [2020-10-28 00:32:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520469249] [2020-10-28 00:32:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:04,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:05,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:09,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 00:32:09,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:32:09,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:09,720 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:09,761 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 00:32:09,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520469249] [2020-10-28 00:32:09,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:09,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:32:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696945780] [2020-10-28 00:32:09,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:32:09,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:32:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:09,764 INFO L87 Difference]: Start difference. First operand 7546 states and 11233 transitions. Second operand 5 states. [2020-10-28 00:32:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:12,722 INFO L93 Difference]: Finished difference Result 18203 states and 28099 transitions. [2020-10-28 00:32:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:12,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-10-28 00:32:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:12,755 INFO L225 Difference]: With dead ends: 18203 [2020-10-28 00:32:12,755 INFO L226 Difference]: Without dead ends: 12663 [2020-10-28 00:32:12,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2020-10-28 00:32:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 7531. [2020-10-28 00:32:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7531 states. [2020-10-28 00:32:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7531 states to 7531 states and 11200 transitions. [2020-10-28 00:32:13,577 INFO L78 Accepts]: Start accepts. Automaton has 7531 states and 11200 transitions. Word has length 171 [2020-10-28 00:32:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:13,577 INFO L481 AbstractCegarLoop]: Abstraction has 7531 states and 11200 transitions. [2020-10-28 00:32:13,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:32:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7531 states and 11200 transitions. [2020-10-28 00:32:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 00:32:13,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:13,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:13,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:32:13,583 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1108931038, now seen corresponding path program 1 times [2020-10-28 00:32:13,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:13,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565037198] [2020-10-28 00:32:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:13,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:32:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:18,988 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:18,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:19,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:19,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:19,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:19,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:19,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:19,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:19,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:19,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:19,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:19,028 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 00:32:19,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565037198] [2020-10-28 00:32:19,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:19,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:32:19,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884977259] [2020-10-28 00:32:19,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:32:19,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:32:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:32:19,030 INFO L87 Difference]: Start difference. First operand 7531 states and 11200 transitions. Second operand 4 states. [2020-10-28 00:32:21,296 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:32:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:21,947 INFO L93 Difference]: Finished difference Result 18931 states and 28732 transitions. [2020-10-28 00:32:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:21,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-10-28 00:32:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:21,974 INFO L225 Difference]: With dead ends: 18931 [2020-10-28 00:32:21,975 INFO L226 Difference]: Without dead ends: 12082 [2020-10-28 00:32:21,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2020-10-28 00:32:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 11141. [2020-10-28 00:32:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11141 states. [2020-10-28 00:32:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 16970 transitions. [2020-10-28 00:32:23,136 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 16970 transitions. Word has length 171 [2020-10-28 00:32:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:23,136 INFO L481 AbstractCegarLoop]: Abstraction has 11141 states and 16970 transitions. [2020-10-28 00:32:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 16970 transitions. [2020-10-28 00:32:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 00:32:23,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:23,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:23,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:32:23,141 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -286481429, now seen corresponding path program 1 times [2020-10-28 00:32:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:23,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430006669] [2020-10-28 00:32:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:23,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:24,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:24,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:25,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:28,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:28,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-28 00:32:28,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:32:28,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:32:28,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:32:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:32:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 00:32:28,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:28,578 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:28,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:28,645 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 00:32:28,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430006669] [2020-10-28 00:32:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:32:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900780897] [2020-10-28 00:32:28,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:32:28,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:32:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:28,648 INFO L87 Difference]: Start difference. First operand 11141 states and 16970 transitions. Second operand 5 states. [2020-10-28 00:32:30,274 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 00:32:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:31,373 INFO L93 Difference]: Finished difference Result 17408 states and 26593 transitions. [2020-10-28 00:32:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:32:31,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-10-28 00:32:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:31,385 INFO L225 Difference]: With dead ends: 17408 [2020-10-28 00:32:31,385 INFO L226 Difference]: Without dead ends: 10513 [2020-10-28 00:32:31,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:32:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10513 states. [2020-10-28 00:32:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10513 to 10348. [2020-10-28 00:32:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10348 states. [2020-10-28 00:32:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 15778 transitions. [2020-10-28 00:32:32,378 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 15778 transitions. Word has length 174 [2020-10-28 00:32:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:32,379 INFO L481 AbstractCegarLoop]: Abstraction has 10348 states and 15778 transitions. [2020-10-28 00:32:32,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:32:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 15778 transitions. [2020-10-28 00:32:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 00:32:32,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:32,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:32,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:32:32,383 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -570426735, now seen corresponding path program 1 times [2020-10-28 00:32:32,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:32,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670753299] [2020-10-28 00:32:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:32,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:32,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:33,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 00:32:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:37,793 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:37,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:37,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:37,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:37,926 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 00:32:37,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670753299] [2020-10-28 00:32:37,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:37,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:32:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604632130] [2020-10-28 00:32:37,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:32:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:32:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:32:37,928 INFO L87 Difference]: Start difference. First operand 10348 states and 15778 transitions. Second operand 7 states. [2020-10-28 00:32:40,679 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 00:32:40,986 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 00:32:41,297 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:32:41,605 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 00:32:41,920 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 00:32:42,359 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 00:32:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:46,977 INFO L93 Difference]: Finished difference Result 63570 states and 98938 transitions. [2020-10-28 00:32:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:32:46,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2020-10-28 00:32:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:47,062 INFO L225 Difference]: With dead ends: 63570 [2020-10-28 00:32:47,062 INFO L226 Difference]: Without dead ends: 53995 [2020-10-28 00:32:47,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-28 00:32:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53995 states. [2020-10-28 00:32:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53995 to 53974. [2020-10-28 00:32:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53974 states. [2020-10-28 00:32:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53974 states to 53974 states and 83662 transitions. [2020-10-28 00:32:51,668 INFO L78 Accepts]: Start accepts. Automaton has 53974 states and 83662 transitions. Word has length 176 [2020-10-28 00:32:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:51,668 INFO L481 AbstractCegarLoop]: Abstraction has 53974 states and 83662 transitions. [2020-10-28 00:32:51,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:32:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53974 states and 83662 transitions. [2020-10-28 00:32:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 00:32:51,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:51,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:51,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:32:51,681 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash 722814459, now seen corresponding path program 1 times [2020-10-28 00:32:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:51,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290668848] [2020-10-28 00:32:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:51,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:51,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:52,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:52,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:54,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:55,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:55,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 00:32:56,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:57,074 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:32:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:57,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:57,121 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 00:32:57,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290668848] [2020-10-28 00:32:57,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:57,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:32:57,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578710513] [2020-10-28 00:32:57,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:32:57,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:32:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:32:57,123 INFO L87 Difference]: Start difference. First operand 53974 states and 83662 transitions. Second operand 7 states. [2020-10-28 00:32:57,474 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:33:00,706 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 00:33:01,012 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 00:33:01,335 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:33:04,744 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:33:05,179 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 00:33:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:33:22,368 INFO L93 Difference]: Finished difference Result 288136 states and 450384 transitions. [2020-10-28 00:33:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:33:22,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2020-10-28 00:33:22,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:33:22,872 INFO L225 Difference]: With dead ends: 288136 [2020-10-28 00:33:22,872 INFO L226 Difference]: Without dead ends: 239908 [2020-10-28 00:33:22,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:33:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239908 states. [2020-10-28 00:33:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239908 to 88999. [2020-10-28 00:33:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88999 states. [2020-10-28 00:33:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88999 states to 88999 states and 138317 transitions. [2020-10-28 00:33:32,135 INFO L78 Accepts]: Start accepts. Automaton has 88999 states and 138317 transitions. Word has length 176 [2020-10-28 00:33:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:33:32,136 INFO L481 AbstractCegarLoop]: Abstraction has 88999 states and 138317 transitions. [2020-10-28 00:33:32,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:33:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 88999 states and 138317 transitions. [2020-10-28 00:33:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 00:33:32,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:33:32,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:32,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:33:32,152 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:33:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:33:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2093487988, now seen corresponding path program 1 times [2020-10-28 00:33:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:33:32,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523042522] [2020-10-28 00:33:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:33:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:32,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:33,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:33,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:36,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking...