/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.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:37:38,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:37:38,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:37:38,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:37:38,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:37:38,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:37:38,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:37:38,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:37:38,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:37:38,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:37:38,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:37:38,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:37:38,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:37:38,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:37:38,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:37:38,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:37:38,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:37:38,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:37:38,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:37:38,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:37:38,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:37:38,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:37:38,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:37:38,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:37:38,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:37:38,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:37:38,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:37:38,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:37:38,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:37:38,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:37:38,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:37:38,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:37:38,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:37:38,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:37:38,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:37:38,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:37:38,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:37:38,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:37:38,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:37:38,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:37:38,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:37:38,921 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 00:37:38,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:37:38,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:37:38,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:37:38,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:37:38,949 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:37:38,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:37:38,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:37:38,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:37:38,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:37:38,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:37:38,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:37:38,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:37:38,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:37:38,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:37:38,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:37:38,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:37:38,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:37:38,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:37:38,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:37:38,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:37:38,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:37:38,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:37:38,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:37:38,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:37:38,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:37:38,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:37:38,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:37:38,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:37:38,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:37:38,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:37:39,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:37:39,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:37:39,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:37:39,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:37:39,408 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:37:39,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:37:39,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265b66987/787e1074e02f4a4ca81d857c25b9b284/FLAGc6a857cc8 [2020-10-28 00:37:40,304 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:37:40,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:37:40,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265b66987/787e1074e02f4a4ca81d857c25b9b284/FLAGc6a857cc8 [2020-10-28 00:37:40,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265b66987/787e1074e02f4a4ca81d857c25b9b284 [2020-10-28 00:37:40,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:37:40,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:37:40,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:37:40,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:37:40,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:37:40,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:40" (1/1) ... [2020-10-28 00:37:40,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689b59bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:40, skipping insertion in model container [2020-10-28 00:37:40,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:40" (1/1) ... [2020-10-28 00:37:40,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:37:40,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:37:42,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:37:42,052 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:37:42,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:37:42,871 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:37:42,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42 WrapperNode [2020-10-28 00:37:42,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:37:42,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:37:42,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:37:42,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:37:42,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:42,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:42,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:42,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:43,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:43,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:43,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (1/1) ... [2020-10-28 00:37:43,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:37:43,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:37:43,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:37:43,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:37:43,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (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 00:37:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:37:43,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:37:43,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:37:43,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:37:43,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:37:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:37:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:37:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:37:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:37:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:37:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:37:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:37:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:37:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:37:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:37:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:37:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:37:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:37:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:37:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:37:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:37:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:37:46,880 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:37:46,882 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:37:46,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:37:46 BoogieIcfgContainer [2020-10-28 00:37:46,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:37:46,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:37:46,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:37:46,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:37:46,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:37:40" (1/3) ... [2020-10-28 00:37:46,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a194d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:37:46, skipping insertion in model container [2020-10-28 00:37:46,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:42" (2/3) ... [2020-10-28 00:37:46,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a194d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:37:46, skipping insertion in model container [2020-10-28 00:37:46,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:37:46" (3/3) ... [2020-10-28 00:37:46,899 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:37:46,911 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:37:46,922 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:37:46,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:37:46,979 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:37:46,979 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:37:46,979 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:37:46,979 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:37:46,980 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:37:46,980 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:37:46,980 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:37:46,980 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:37:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states. [2020-10-28 00:37:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 00:37:47,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:47,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:37:47,052 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash -248347841, now seen corresponding path program 1 times [2020-10-28 00:37:47,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:47,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079112708] [2020-10-28 00:37:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:48,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:49,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:52,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 00:37:52,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:52,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-28 00:37:52,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 00:37:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-28 00:37:52,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:37:53,959 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:37:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:54,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 00:37:54,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:37:54,283 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 00:37:54,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079112708] [2020-10-28 00:37:54,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:54,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121941650] [2020-10-28 00:37:54,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:54,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:54,319 INFO L87 Difference]: Start difference. First operand 1031 states. Second operand 4 states. [2020-10-28 00:37:55,278 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:38:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:03,673 INFO L93 Difference]: Finished difference Result 1809 states and 3227 transitions. [2020-10-28 00:38:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:03,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-28 00:38:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:03,707 INFO L225 Difference]: With dead ends: 1809 [2020-10-28 00:38:03,708 INFO L226 Difference]: Without dead ends: 1520 [2020-10-28 00:38:03,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-10-28 00:38:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1517. [2020-10-28 00:38:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-10-28 00:38:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2337 transitions. [2020-10-28 00:38:03,862 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2337 transitions. Word has length 328 [2020-10-28 00:38:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:03,868 INFO L481 AbstractCegarLoop]: Abstraction has 1517 states and 2337 transitions. [2020-10-28 00:38:03,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2337 transitions. [2020-10-28 00:38:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 00:38:03,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:03,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:03,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:38:03,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1869741437, now seen corresponding path program 1 times [2020-10-28 00:38:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:03,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234699941] [2020-10-28 00:38:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:06,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:09,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:09,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 00:38:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 00:38:09,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:10,127 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:38:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:10,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:10,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:38:10,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:10,364 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 00:38:10,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234699941] [2020-10-28 00:38:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:10,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:10,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159168607] [2020-10-28 00:38:10,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:10,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:10,382 INFO L87 Difference]: Start difference. First operand 1517 states and 2337 transitions. Second operand 4 states. [2020-10-28 00:38:11,327 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:38:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:18,515 INFO L93 Difference]: Finished difference Result 2970 states and 4624 transitions. [2020-10-28 00:38:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:18,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-28 00:38:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:18,534 INFO L225 Difference]: With dead ends: 2970 [2020-10-28 00:38:18,534 INFO L226 Difference]: Without dead ends: 2602 [2020-10-28 00:38:18,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2020-10-28 00:38:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2599. [2020-10-28 00:38:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2599 states. [2020-10-28 00:38:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4020 transitions. [2020-10-28 00:38:18,634 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4020 transitions. Word has length 328 [2020-10-28 00:38:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:18,635 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 4020 transitions. [2020-10-28 00:38:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4020 transitions. [2020-10-28 00:38:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 00:38:18,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:18,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:18,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:38:18,644 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1880238502, now seen corresponding path program 1 times [2020-10-28 00:38:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:18,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088376356] [2020-10-28 00:38:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:19,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:21,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:23,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:23,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 00:38:23,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:38:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 00:38:23,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:38:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:38:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 00:38:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:24,886 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:38:24,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:24,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:24,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:25,143 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 00:38:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088376356] [2020-10-28 00:38:25,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:25,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:38:25,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487457656] [2020-10-28 00:38:25,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:38:25,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:38:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:25,148 INFO L87 Difference]: Start difference. First operand 2599 states and 4020 transitions. Second operand 5 states. [2020-10-28 00:38:34,239 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:38:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:36,894 INFO L93 Difference]: Finished difference Result 7662 states and 11832 transitions. [2020-10-28 00:38:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:38:36,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-10-28 00:38:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:36,920 INFO L225 Difference]: With dead ends: 7662 [2020-10-28 00:38:36,920 INFO L226 Difference]: Without dead ends: 5096 [2020-10-28 00:38:36,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:38:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2020-10-28 00:38:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4915. [2020-10-28 00:38:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4915 states. [2020-10-28 00:38:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 7576 transitions. [2020-10-28 00:38:37,191 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 7576 transitions. Word has length 328 [2020-10-28 00:38:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:37,191 INFO L481 AbstractCegarLoop]: Abstraction has 4915 states and 7576 transitions. [2020-10-28 00:38:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:38:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 7576 transitions. [2020-10-28 00:38:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 00:38:37,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:37,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:37,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:38:37,206 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash 913209117, now seen corresponding path program 1 times [2020-10-28 00:38:37,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:37,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501216271] [2020-10-28 00:38:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:42,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 00:38:42,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:42,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 00:38:42,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:42,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:42,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:38:42,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-28 00:38:42,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:43,284 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:38:43,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:43,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:43,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:43,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:43,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:38:43,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:43,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:43,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:43,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:43,515 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 00:38:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501216271] [2020-10-28 00:38:43,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:43,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:43,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39015092] [2020-10-28 00:38:43,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:43,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:43,518 INFO L87 Difference]: Start difference. First operand 4915 states and 7576 transitions. Second operand 4 states. [2020-10-28 00:38:53,548 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:38:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:55,173 INFO L93 Difference]: Finished difference Result 14397 states and 22122 transitions. [2020-10-28 00:38:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:55,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-28 00:38:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:55,227 INFO L225 Difference]: With dead ends: 14397 [2020-10-28 00:38:55,228 INFO L226 Difference]: Without dead ends: 9626 [2020-10-28 00:38:55,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9626 states. [2020-10-28 00:38:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9626 to 9453. [2020-10-28 00:38:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9453 states. [2020-10-28 00:38:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9453 states to 9453 states and 14491 transitions. [2020-10-28 00:38:55,696 INFO L78 Accepts]: Start accepts. Automaton has 9453 states and 14491 transitions. Word has length 330 [2020-10-28 00:38:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:55,697 INFO L481 AbstractCegarLoop]: Abstraction has 9453 states and 14491 transitions. [2020-10-28 00:38:55,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 9453 states and 14491 transitions. [2020-10-28 00:38:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 00:38:55,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:55,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:55,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:38:55,718 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash -819989150, now seen corresponding path program 1 times [2020-10-28 00:38:55,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:55,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848963586] [2020-10-28 00:38:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:00,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:00,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 00:39:00,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:39:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:39:00,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:39:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:39:00,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:01,768 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:39:01,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:01,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:01,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:01,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:01,950 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 00:39:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848963586] [2020-10-28 00:39:01,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:01,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:01,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840397620] [2020-10-28 00:39:01,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:01,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:01,954 INFO L87 Difference]: Start difference. First operand 9453 states and 14491 transitions. Second operand 4 states. [2020-10-28 00:39:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:14,279 INFO L93 Difference]: Finished difference Result 28294 states and 43362 transitions. [2020-10-28 00:39:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:39:14,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-28 00:39:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:14,334 INFO L225 Difference]: With dead ends: 28294 [2020-10-28 00:39:14,334 INFO L226 Difference]: Without dead ends: 18875 [2020-10-28 00:39:14,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18875 states. [2020-10-28 00:39:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18875 to 9471. [2020-10-28 00:39:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9471 states. [2020-10-28 00:39:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 14515 transitions. [2020-10-28 00:39:14,923 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 14515 transitions. Word has length 330 [2020-10-28 00:39:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:14,924 INFO L481 AbstractCegarLoop]: Abstraction has 9471 states and 14515 transitions. [2020-10-28 00:39:14,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 14515 transitions. [2020-10-28 00:39:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:39:14,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:14,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:39:14,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:39:14,946 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash -411887662, now seen corresponding path program 1 times [2020-10-28 00:39:14,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:14,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021853349] [2020-10-28 00:39:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:15,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:20,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:39:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 00:39:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:20,959 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:39:20,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:20,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:21,146 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 00:39:21,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021853349] [2020-10-28 00:39:21,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:21,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869833437] [2020-10-28 00:39:21,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:21,149 INFO L87 Difference]: Start difference. First operand 9471 states and 14515 transitions. Second operand 4 states. [2020-10-28 00:39:31,413 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:39:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:33,973 INFO L93 Difference]: Finished difference Result 26817 states and 40989 transitions. [2020-10-28 00:39:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:33,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 00:39:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:34,004 INFO L225 Difference]: With dead ends: 26817 [2020-10-28 00:39:34,004 INFO L226 Difference]: Without dead ends: 17543 [2020-10-28 00:39:34,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17543 states. [2020-10-28 00:39:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17543 to 17378. [2020-10-28 00:39:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17378 states. [2020-10-28 00:39:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17378 states to 17378 states and 26446 transitions. [2020-10-28 00:39:34,793 INFO L78 Accepts]: Start accepts. Automaton has 17378 states and 26446 transitions. Word has length 331 [2020-10-28 00:39:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:34,794 INFO L481 AbstractCegarLoop]: Abstraction has 17378 states and 26446 transitions. [2020-10-28 00:39:34,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17378 states and 26446 transitions. [2020-10-28 00:39:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:39:34,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:34,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:39:34,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:39:34,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash 6849391, now seen corresponding path program 1 times [2020-10-28 00:39:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:34,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093071198] [2020-10-28 00:39:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:36,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:37,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:37,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:39:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:39:39,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:40,911 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:39:40,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:40,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:41,041 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 00:39:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093071198] [2020-10-28 00:39:41,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:41,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:39:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420166442] [2020-10-28 00:39:41,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:39:41,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:39:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:41,044 INFO L87 Difference]: Start difference. First operand 17378 states and 26446 transitions. Second operand 5 states. [2020-10-28 00:39:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:54,156 INFO L93 Difference]: Finished difference Result 50165 states and 76113 transitions. [2020-10-28 00:39:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:54,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 00:39:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:54,224 INFO L225 Difference]: With dead ends: 50165 [2020-10-28 00:39:54,224 INFO L226 Difference]: Without dead ends: 33295 [2020-10-28 00:39:54,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:39:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33295 states. [2020-10-28 00:39:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33295 to 17634. [2020-10-28 00:39:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17634 states. [2020-10-28 00:39:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17634 states to 17634 states and 26876 transitions. [2020-10-28 00:39:55,527 INFO L78 Accepts]: Start accepts. Automaton has 17634 states and 26876 transitions. Word has length 331 [2020-10-28 00:39:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:55,528 INFO L481 AbstractCegarLoop]: Abstraction has 17634 states and 26876 transitions. [2020-10-28 00:39:55,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:39:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 17634 states and 26876 transitions. [2020-10-28 00:39:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 00:39:55,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:55,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:39:55,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:39:55,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 600842259, now seen corresponding path program 1 times [2020-10-28 00:39:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:55,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896059444] [2020-10-28 00:39:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:55,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:55,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:40:00,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:01,516 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:40:01,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:01,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:01,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:01,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:01,683 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 00:40:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896059444] [2020-10-28 00:40:01,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:01,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:01,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038953113] [2020-10-28 00:40:01,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:01,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:01,686 INFO L87 Difference]: Start difference. First operand 17634 states and 26876 transitions. Second operand 4 states. [2020-10-28 00:40:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:14,767 INFO L93 Difference]: Finished difference Result 51334 states and 77860 transitions. [2020-10-28 00:40:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:40:14,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-28 00:40:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:14,832 INFO L225 Difference]: With dead ends: 51334 [2020-10-28 00:40:14,832 INFO L226 Difference]: Without dead ends: 34487 [2020-10-28 00:40:14,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34487 states. [2020-10-28 00:40:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34487 to 17739. [2020-10-28 00:40:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17739 states. [2020-10-28 00:40:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 27010 transitions. [2020-10-28 00:40:16,522 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 27010 transitions. Word has length 333 [2020-10-28 00:40:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:16,523 INFO L481 AbstractCegarLoop]: Abstraction has 17739 states and 27010 transitions. [2020-10-28 00:40:16,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 27010 transitions. [2020-10-28 00:40:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 00:40:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:16,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:16,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:40:16,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1381190093, now seen corresponding path program 1 times [2020-10-28 00:40:16,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:16,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177480984] [2020-10-28 00:40:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:16,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:21,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-28 00:40:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 00:40:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,543 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:40:22,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:22,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:22,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:22,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:22,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,654 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 00:40:22,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177480984] [2020-10-28 00:40:22,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253358240] [2020-10-28 00:40:22,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:22,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:22,656 INFO L87 Difference]: Start difference. First operand 17739 states and 27010 transitions. Second operand 4 states. [2020-10-28 00:40:32,717 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:40:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:33,055 INFO L93 Difference]: Finished difference Result 42588 states and 65232 transitions. [2020-10-28 00:40:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:33,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-28 00:40:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:33,094 INFO L225 Difference]: With dead ends: 42588 [2020-10-28 00:40:33,095 INFO L226 Difference]: Without dead ends: 26718 [2020-10-28 00:40:33,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26718 states. [2020-10-28 00:40:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26718 to 21625. [2020-10-28 00:40:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21625 states. [2020-10-28 00:40:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21625 states to 21625 states and 33381 transitions. [2020-10-28 00:40:34,394 INFO L78 Accepts]: Start accepts. Automaton has 21625 states and 33381 transitions. Word has length 334 [2020-10-28 00:40:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:34,394 INFO L481 AbstractCegarLoop]: Abstraction has 21625 states and 33381 transitions. [2020-10-28 00:40:34,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21625 states and 33381 transitions. [2020-10-28 00:40:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 00:40:34,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:34,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:34,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:40:34,414 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1782907462, now seen corresponding path program 1 times [2020-10-28 00:40:34,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:34,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987770871] [2020-10-28 00:40:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:40:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:40,455 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:40:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:40,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:40,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:40,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:40:40,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:40,638 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 00:40:40,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987770871] [2020-10-28 00:40:40,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:40,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:40:40,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809322682] [2020-10-28 00:40:40,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:40:40,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:40,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:40:40,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:40,640 INFO L87 Difference]: Start difference. First operand 21625 states and 33381 transitions. Second operand 5 states. [2020-10-28 00:40:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:48,235 INFO L93 Difference]: Finished difference Result 41010 states and 63139 transitions. [2020-10-28 00:40:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:48,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-28 00:40:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:48,264 INFO L225 Difference]: With dead ends: 41010 [2020-10-28 00:40:48,264 INFO L226 Difference]: Without dead ends: 20263 [2020-10-28 00:40:48,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:40:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20263 states. [2020-10-28 00:40:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20227. [2020-10-28 00:40:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20227 states. [2020-10-28 00:40:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20227 states to 20227 states and 31197 transitions. [2020-10-28 00:40:49,345 INFO L78 Accepts]: Start accepts. Automaton has 20227 states and 31197 transitions. Word has length 334 [2020-10-28 00:40:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:49,345 INFO L481 AbstractCegarLoop]: Abstraction has 20227 states and 31197 transitions. [2020-10-28 00:40:49,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:40:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20227 states and 31197 transitions. [2020-10-28 00:40:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-28 00:40:49,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:49,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:49,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:40:49,358 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1447098014, now seen corresponding path program 1 times [2020-10-28 00:40:49,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:49,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947251535] [2020-10-28 00:40:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:54,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 00:40:54,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:40:54,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:55,373 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:40:55,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:55,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:55,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:55,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:40:55,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:55,480 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 00:40:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947251535] [2020-10-28 00:40:55,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:55,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:55,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485935868] [2020-10-28 00:40:55,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:55,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:55,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:55,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:55,483 INFO L87 Difference]: Start difference. First operand 20227 states and 31197 transitions. Second operand 4 states. [2020-10-28 00:41:05,318 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:41:06,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:06,170 INFO L93 Difference]: Finished difference Result 49907 states and 77688 transitions. [2020-10-28 00:41:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:06,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-10-28 00:41:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:06,211 INFO L225 Difference]: With dead ends: 49907 [2020-10-28 00:41:06,212 INFO L226 Difference]: Without dead ends: 31502 [2020-10-28 00:41:06,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31502 states. [2020-10-28 00:41:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31502 to 26691. [2020-10-28 00:41:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26691 states. [2020-10-28 00:41:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26691 states to 26691 states and 41775 transitions. [2020-10-28 00:41:07,737 INFO L78 Accepts]: Start accepts. Automaton has 26691 states and 41775 transitions. Word has length 336 [2020-10-28 00:41:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:07,737 INFO L481 AbstractCegarLoop]: Abstraction has 26691 states and 41775 transitions. [2020-10-28 00:41:07,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 26691 states and 41775 transitions. [2020-10-28 00:41:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 00:41:07,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:07,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:07,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:41:07,750 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash 592711672, now seen corresponding path program 1 times [2020-10-28 00:41:07,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:07,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289675678] [2020-10-28 00:41:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:07,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking...