/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:33:19,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:33:19,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:33:19,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:33:19,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:33:19,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:33:19,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:33:19,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:33:19,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:33:19,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:33:19,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:33:19,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:33:19,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:33:19,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:33:19,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:33:19,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:33:19,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:33:19,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:33:19,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:33:19,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:33:19,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:33:19,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:33:19,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:33:19,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:33:19,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:33:19,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:33:19,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:33:19,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:33:19,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:33:19,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:33:19,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:33:19,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:33:19,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:33:19,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:33:19,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:33:19,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:33:19,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:33:19,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:33:19,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:33:19,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:33:19,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:33:19,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:33:19,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:33:19,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:33:19,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:33:19,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:33:19,347 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:33:19,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:33:19,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:33:19,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:33:19,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:33:19,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:33:19,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:33:19,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:33:19,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:33:19,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:33:19,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:33:19,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:33:19,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:33:19,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:33:19,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:33:19,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:33:19,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:33:19,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:19,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:33:19,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:33:19,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:33:19,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:33:19,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:33:19,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:33:19,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:33:19,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:33:19,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:33:19,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:33:19,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:33:19,887 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:33:19,888 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:33:19,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:33:19,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf251ad2b/8c7d9294809c468d8a7180d7846a3d0d/FLAG775c955be [2020-10-27 05:33:20,809 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:33:20,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:33:20,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf251ad2b/8c7d9294809c468d8a7180d7846a3d0d/FLAG775c955be [2020-10-27 05:33:21,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf251ad2b/8c7d9294809c468d8a7180d7846a3d0d [2020-10-27 05:33:21,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:33:21,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:33:21,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:21,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:33:21,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:33:21,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa641a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21, skipping insertion in model container [2020-10-27 05:33:21,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:33:21,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:33:21,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:21,707 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:33:21,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:21,834 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:33:21,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21 WrapperNode [2020-10-27 05:33:21,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:21,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:33:21,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:33:21,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:33:21,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... [2020-10-27 05:33:21,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:33:21,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:33:21,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:33:21,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:33:21,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:22,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:33:22,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:33:22,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:33:22,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:33:22,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:33:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:33:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:33:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:33:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:33:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:33:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:33:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:33:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:33:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:33:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:33:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:33:23,006 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:33:23,006 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:33:23,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:33:23 BoogieIcfgContainer [2020-10-27 05:33:23,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:33:23,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:33:23,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:33:23,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:33:23,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:33:21" (1/3) ... [2020-10-27 05:33:23,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed24df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:33:23, skipping insertion in model container [2020-10-27 05:33:23,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:21" (2/3) ... [2020-10-27 05:33:23,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed24df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:33:23, skipping insertion in model container [2020-10-27 05:33:23,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:33:23" (3/3) ... [2020-10-27 05:33:23,027 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:33:23,041 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:33:23,048 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:33:23,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:33:23,097 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:33:23,097 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:33:23,097 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:33:23,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:33:23,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:33:23,098 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:33:23,098 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:33:23,098 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:33:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-10-27 05:33:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:33:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:23,133 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] [2020-10-27 05:33:23,134 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:23,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1411810681, now seen corresponding path program 1 times [2020-10-27 05:33:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:23,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797855979] [2020-10-27 05:33:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:24,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:25,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:25,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:33:25,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:33:25,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-27 05:33:25,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:25,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:25,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:33:25,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:33:25,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:33:26,087 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:26,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:26,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:26,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:33:26,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:26,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797855979] [2020-10-27 05:33:26,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:26,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:26,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007384308] [2020-10-27 05:33:26,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:26,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:26,192 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 6 states. [2020-10-27 05:33:27,000 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:33:27,213 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:33:27,406 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:33:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:27,843 INFO L93 Difference]: Finished difference Result 494 states and 805 transitions. [2020-10-27 05:33:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:27,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:33:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:27,870 INFO L225 Difference]: With dead ends: 494 [2020-10-27 05:33:27,870 INFO L226 Difference]: Without dead ends: 357 [2020-10-27 05:33:27,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-27 05:33:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 351. [2020-10-27 05:33:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 05:33:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 518 transitions. [2020-10-27 05:33:27,983 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 518 transitions. Word has length 55 [2020-10-27 05:33:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:27,984 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 518 transitions. [2020-10-27 05:33:27,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 518 transitions. [2020-10-27 05:33:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:33:27,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:27,988 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] [2020-10-27 05:33:27,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:33:27,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1442003209, now seen corresponding path program 1 times [2020-10-27 05:33:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:27,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95117753] [2020-10-27 05:33:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:29,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:33:29,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:33:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-27 05:33:29,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:33:29,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:29,605 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:29,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:29,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:33:29,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:29,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95117753] [2020-10-27 05:33:29,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:29,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370198659] [2020-10-27 05:33:29,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:29,678 INFO L87 Difference]: Start difference. First operand 351 states and 518 transitions. Second operand 6 states. [2020-10-27 05:33:29,943 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:33:30,582 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:33:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:31,150 INFO L93 Difference]: Finished difference Result 851 states and 1284 transitions. [2020-10-27 05:33:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:31,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:33:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:31,158 INFO L225 Difference]: With dead ends: 851 [2020-10-27 05:33:31,159 INFO L226 Difference]: Without dead ends: 568 [2020-10-27 05:33:31,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-27 05:33:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 565. [2020-10-27 05:33:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-27 05:33:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 844 transitions. [2020-10-27 05:33:31,246 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 844 transitions. Word has length 56 [2020-10-27 05:33:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:31,247 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 844 transitions. [2020-10-27 05:33:31,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 844 transitions. [2020-10-27 05:33:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:33:31,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:31,259 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] [2020-10-27 05:33:31,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:33:31,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 240607992, now seen corresponding path program 1 times [2020-10-27 05:33:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:31,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336136171] [2020-10-27 05:33:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:32,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:32,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:33:32,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:33:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-27 05:33:32,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:33:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:32,941 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:32,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:32,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:32,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:32,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:32,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:33:32,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:33,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336136171] [2020-10-27 05:33:33,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:33,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:33,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360647633] [2020-10-27 05:33:33,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:33,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:33,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:33,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:33,008 INFO L87 Difference]: Start difference. First operand 565 states and 844 transitions. Second operand 6 states. [2020-10-27 05:33:33,266 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:33:33,844 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:33:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:34,421 INFO L93 Difference]: Finished difference Result 1522 states and 2303 transitions. [2020-10-27 05:33:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:34,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:33:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:34,428 INFO L225 Difference]: With dead ends: 1522 [2020-10-27 05:33:34,429 INFO L226 Difference]: Without dead ends: 1005 [2020-10-27 05:33:34,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:33:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-10-27 05:33:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1002. [2020-10-27 05:33:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-27 05:33:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1505 transitions. [2020-10-27 05:33:34,536 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1505 transitions. Word has length 56 [2020-10-27 05:33:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:34,538 INFO L481 AbstractCegarLoop]: Abstraction has 1002 states and 1505 transitions. [2020-10-27 05:33:34,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1505 transitions. [2020-10-27 05:33:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:33:34,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:34,540 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] [2020-10-27 05:33:34,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:33:34,541 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1841252121, now seen corresponding path program 1 times [2020-10-27 05:33:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:34,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762452294] [2020-10-27 05:33:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:35,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:35,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:33:35,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:33:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:35,977 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:35,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:36,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:36,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:36,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:33:36,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:36,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:36,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:36,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:36,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762452294] [2020-10-27 05:33:36,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:36,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584335600] [2020-10-27 05:33:36,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:36,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:36,072 INFO L87 Difference]: Start difference. First operand 1002 states and 1505 transitions. Second operand 6 states. [2020-10-27 05:33:36,321 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:33:36,873 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:33:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:37,454 INFO L93 Difference]: Finished difference Result 2833 states and 4274 transitions. [2020-10-27 05:33:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:37,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:33:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:37,468 INFO L225 Difference]: With dead ends: 2833 [2020-10-27 05:33:37,468 INFO L226 Difference]: Without dead ends: 1863 [2020-10-27 05:33:37,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2020-10-27 05:33:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1860. [2020-10-27 05:33:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 05:33:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2761 transitions. [2020-10-27 05:33:37,620 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2761 transitions. Word has length 56 [2020-10-27 05:33:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:37,622 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2761 transitions. [2020-10-27 05:33:37,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2761 transitions. [2020-10-27 05:33:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:33:37,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:37,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:37,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:33:37,627 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1497188338, now seen corresponding path program 1 times [2020-10-27 05:33:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:37,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090935581] [2020-10-27 05:33:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:37,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:40,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:40,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:33:40,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:33:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3054 [2020-10-27 05:33:40,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:33:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:33:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,087 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:41,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:41,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:41,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:41,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:41,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:41,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:33:41,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:41,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:41,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090935581] [2020-10-27 05:33:41,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:41,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:33:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215226007] [2020-10-27 05:33:41,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:33:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:33:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:41,159 INFO L87 Difference]: Start difference. First operand 1860 states and 2761 transitions. Second operand 11 states. [2020-10-27 05:33:41,496 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:33:42,617 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:33:42,873 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:33:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:44,922 INFO L93 Difference]: Finished difference Result 6006 states and 8932 transitions. [2020-10-27 05:33:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:33:44,923 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:33:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:44,952 INFO L225 Difference]: With dead ends: 6006 [2020-10-27 05:33:44,952 INFO L226 Difference]: Without dead ends: 5449 [2020-10-27 05:33:44,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:33:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2020-10-27 05:33:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 1860. [2020-10-27 05:33:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 05:33:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2760 transitions. [2020-10-27 05:33:45,170 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2760 transitions. Word has length 57 [2020-10-27 05:33:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:45,171 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2760 transitions. [2020-10-27 05:33:45,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:33:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2760 transitions. [2020-10-27 05:33:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:33:45,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:45,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:45,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:33:45,173 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:45,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1205467218, now seen corresponding path program 1 times [2020-10-27 05:33:45,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:45,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516105674] [2020-10-27 05:33:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:47,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:47,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:33:47,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:33:47,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2721 [2020-10-27 05:33:47,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:33:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:33:47,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:33:48,319 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:48,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:33:48,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:48,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:33:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:48,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516105674] [2020-10-27 05:33:48,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:48,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:33:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758704470] [2020-10-27 05:33:48,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:33:48,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:33:48,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:48,389 INFO L87 Difference]: Start difference. First operand 1860 states and 2760 transitions. Second operand 11 states. [2020-10-27 05:33:48,709 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:33:49,784 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:33:50,023 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:33:52,269 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:33:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:52,864 INFO L93 Difference]: Finished difference Result 10112 states and 15202 transitions. [2020-10-27 05:33:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:33:52,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:33:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:52,908 INFO L225 Difference]: With dead ends: 10112 [2020-10-27 05:33:52,908 INFO L226 Difference]: Without dead ends: 9105 [2020-10-27 05:33:52,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:33:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2020-10-27 05:33:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 1917. [2020-10-27 05:33:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-27 05:33:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2834 transitions. [2020-10-27 05:33:53,216 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2834 transitions. Word has length 57 [2020-10-27 05:33:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:53,217 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 2834 transitions. [2020-10-27 05:33:53,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:33:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2834 transitions. [2020-10-27 05:33:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:33:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:53,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:53,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:33:53,219 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 287238322, now seen corresponding path program 1 times [2020-10-27 05:33:53,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:53,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415361191] [2020-10-27 05:33:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:53,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:55,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:55,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:33:55,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:33:55,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-27 05:33:55,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:33:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:33:55,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:55,775 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:33:55,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:55,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:55,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:55,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:55,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415361191] [2020-10-27 05:33:55,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:55,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:33:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357796897] [2020-10-27 05:33:55,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:33:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:33:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:55,831 INFO L87 Difference]: Start difference. First operand 1917 states and 2834 transitions. Second operand 11 states. [2020-10-27 05:33:56,144 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:33:57,567 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:33:57,834 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:34:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:00,777 INFO L93 Difference]: Finished difference Result 7271 states and 10728 transitions. [2020-10-27 05:34:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:34:00,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:34:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:00,807 INFO L225 Difference]: With dead ends: 7271 [2020-10-27 05:34:00,807 INFO L226 Difference]: Without dead ends: 5822 [2020-10-27 05:34:00,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:34:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2020-10-27 05:34:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 1903. [2020-10-27 05:34:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1903 states. [2020-10-27 05:34:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2793 transitions. [2020-10-27 05:34:01,129 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2793 transitions. Word has length 57 [2020-10-27 05:34:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:01,130 INFO L481 AbstractCegarLoop]: Abstraction has 1903 states and 2793 transitions. [2020-10-27 05:34:01,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:34:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2793 transitions. [2020-10-27 05:34:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:34:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:01,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:01,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:34:01,132 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 58071964, now seen corresponding path program 1 times [2020-10-27 05:34:01,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:01,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131891951] [2020-10-27 05:34:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:01,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:34:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:34:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:01,728 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:01,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:01,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131891951] [2020-10-27 05:34:01,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:01,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075724849] [2020-10-27 05:34:01,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:01,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:01,769 INFO L87 Difference]: Start difference. First operand 1903 states and 2793 transitions. Second operand 6 states. [2020-10-27 05:34:02,022 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:34:02,590 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:34:02,844 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:34:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:03,756 INFO L93 Difference]: Finished difference Result 6101 states and 9085 transitions. [2020-10-27 05:34:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:03,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-27 05:34:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:03,779 INFO L225 Difference]: With dead ends: 6101 [2020-10-27 05:34:03,779 INFO L226 Difference]: Without dead ends: 4922 [2020-10-27 05:34:03,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2020-10-27 05:34:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 3471. [2020-10-27 05:34:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3471 states. [2020-10-27 05:34:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 5069 transitions. [2020-10-27 05:34:04,305 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 5069 transitions. Word has length 58 [2020-10-27 05:34:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:04,306 INFO L481 AbstractCegarLoop]: Abstraction has 3471 states and 5069 transitions. [2020-10-27 05:34:04,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 5069 transitions. [2020-10-27 05:34:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:34:04,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:04,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:04,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:34:04,309 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -83043175, now seen corresponding path program 1 times [2020-10-27 05:34:04,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:04,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279504270] [2020-10-27 05:34:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:06,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:34:06,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:06,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2185 [2020-10-27 05:34:06,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:34:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:34:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:34:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:06,819 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 05:34:07,068 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:07,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:07,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:07,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279504270] [2020-10-27 05:34:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:34:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290419649] [2020-10-27 05:34:07,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:34:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:34:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:07,132 INFO L87 Difference]: Start difference. First operand 3471 states and 5069 transitions. Second operand 10 states. [2020-10-27 05:34:07,406 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:34:08,510 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:34:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:10,464 INFO L93 Difference]: Finished difference Result 13332 states and 19666 transitions. [2020-10-27 05:34:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:34:10,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:34:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:10,489 INFO L225 Difference]: With dead ends: 13332 [2020-10-27 05:34:10,490 INFO L226 Difference]: Without dead ends: 10014 [2020-10-27 05:34:10,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:34:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10014 states. [2020-10-27 05:34:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10014 to 4102. [2020-10-27 05:34:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4102 states. [2020-10-27 05:34:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 6011 transitions. [2020-10-27 05:34:11,192 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 6011 transitions. Word has length 60 [2020-10-27 05:34:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:11,192 INFO L481 AbstractCegarLoop]: Abstraction has 4102 states and 6011 transitions. [2020-10-27 05:34:11,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:34:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 6011 transitions. [2020-10-27 05:34:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:34:11,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:11,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:11,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:34:11,194 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1750287481, now seen corresponding path program 1 times [2020-10-27 05:34:11,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:11,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476396653] [2020-10-27 05:34:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:11,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:13,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:34:13,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-27 05:34:13,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:13,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:34:13,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:34:13,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:34:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:13,474 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:13,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:13,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:13,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:13,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:34:13,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:13,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:13,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476396653] [2020-10-27 05:34:13,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:13,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:34:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941648877] [2020-10-27 05:34:13,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:34:13,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:13,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:34:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:13,512 INFO L87 Difference]: Start difference. First operand 4102 states and 6011 transitions. Second operand 10 states. [2020-10-27 05:34:13,876 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:34:15,334 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:34:15,638 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:34:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:18,916 INFO L93 Difference]: Finished difference Result 20171 states and 29925 transitions. [2020-10-27 05:34:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:34:18,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:34:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:18,957 INFO L225 Difference]: With dead ends: 20171 [2020-10-27 05:34:18,957 INFO L226 Difference]: Without dead ends: 16245 [2020-10-27 05:34:18,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:34:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16245 states. [2020-10-27 05:34:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16245 to 8438. [2020-10-27 05:34:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8438 states. [2020-10-27 05:34:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 12523 transitions. [2020-10-27 05:34:20,341 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 12523 transitions. Word has length 60 [2020-10-27 05:34:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:20,342 INFO L481 AbstractCegarLoop]: Abstraction has 8438 states and 12523 transitions. [2020-10-27 05:34:20,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:34:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 12523 transitions. [2020-10-27 05:34:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:34:20,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:20,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:20,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:34:20,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1342721893, now seen corresponding path program 1 times [2020-10-27 05:34:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:20,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600679294] [2020-10-27 05:34:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:34:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:34:22,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:22,875 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:22,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:22,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:22,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600679294] [2020-10-27 05:34:22,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:22,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:34:22,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956166205] [2020-10-27 05:34:22,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:34:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:34:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:22,921 INFO L87 Difference]: Start difference. First operand 8438 states and 12523 transitions. Second operand 10 states. [2020-10-27 05:34:23,193 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:34:24,708 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:34:25,029 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:34:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:31,335 INFO L93 Difference]: Finished difference Result 30838 states and 45799 transitions. [2020-10-27 05:34:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:34:31,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:34:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:31,409 INFO L225 Difference]: With dead ends: 30838 [2020-10-27 05:34:31,409 INFO L226 Difference]: Without dead ends: 28719 [2020-10-27 05:34:31,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:34:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28719 states. [2020-10-27 05:34:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28719 to 8430. [2020-10-27 05:34:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8430 states. [2020-10-27 05:34:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 12510 transitions. [2020-10-27 05:34:33,189 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 12510 transitions. Word has length 60 [2020-10-27 05:34:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:33,189 INFO L481 AbstractCegarLoop]: Abstraction has 8430 states and 12510 transitions. [2020-10-27 05:34:33,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:34:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 12510 transitions. [2020-10-27 05:34:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:34:33,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:33,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:33,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:34:33,192 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash 560307569, now seen corresponding path program 1 times [2020-10-27 05:34:33,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:33,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525400158] [2020-10-27 05:34:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3041 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:34:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:36,593 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:36,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:36,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:34:36,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525400158] [2020-10-27 05:34:36,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:36,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:34:36,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914127077] [2020-10-27 05:34:36,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:34:36,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:34:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:34:36,655 INFO L87 Difference]: Start difference. First operand 8430 states and 12510 transitions. Second operand 8 states. [2020-10-27 05:34:36,904 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:34:37,652 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:34:39,764 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:34:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:44,504 INFO L93 Difference]: Finished difference Result 39620 states and 58326 transitions. [2020-10-27 05:34:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:34:44,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:34:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:44,559 INFO L225 Difference]: With dead ends: 39620 [2020-10-27 05:34:44,559 INFO L226 Difference]: Without dead ends: 31654 [2020-10-27 05:34:44,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:34:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31654 states. [2020-10-27 05:34:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31654 to 8329. [2020-10-27 05:34:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8329 states. [2020-10-27 05:34:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 12253 transitions. [2020-10-27 05:34:46,417 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 12253 transitions. Word has length 61 [2020-10-27 05:34:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:46,417 INFO L481 AbstractCegarLoop]: Abstraction has 8329 states and 12253 transitions. [2020-10-27 05:34:46,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:34:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 12253 transitions. [2020-10-27 05:34:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:34:46,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:46,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:46,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:34:46,420 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash -951982865, now seen corresponding path program 1 times [2020-10-27 05:34:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:46,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127780233] [2020-10-27 05:34:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2609 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:49,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:34:49,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:49,533 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:34:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:49,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:49,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127780233] [2020-10-27 05:34:49,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:49,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:34:49,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036815325] [2020-10-27 05:34:49,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:34:49,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:49,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:34:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:34:49,603 INFO L87 Difference]: Start difference. First operand 8329 states and 12253 transitions. Second operand 12 states. [2020-10-27 05:34:50,137 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 151 [2020-10-27 05:34:51,931 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:34:52,457 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-27 05:34:57,136 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-27 05:34:57,460 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:35:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:07,706 INFO L93 Difference]: Finished difference Result 56896 states and 82674 transitions. [2020-10-27 05:35:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 05:35:07,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 05:35:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:07,785 INFO L225 Difference]: With dead ends: 56896 [2020-10-27 05:35:07,785 INFO L226 Difference]: Without dead ends: 55779 [2020-10-27 05:35:07,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=649, Invalid=2773, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 05:35:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55779 states. [2020-10-27 05:35:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55779 to 8293. [2020-10-27 05:35:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8293 states. [2020-10-27 05:35:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8293 states to 8293 states and 12193 transitions. [2020-10-27 05:35:09,848 INFO L78 Accepts]: Start accepts. Automaton has 8293 states and 12193 transitions. Word has length 61 [2020-10-27 05:35:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:09,848 INFO L481 AbstractCegarLoop]: Abstraction has 8293 states and 12193 transitions. [2020-10-27 05:35:09,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:35:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8293 states and 12193 transitions. [2020-10-27 05:35:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:35:09,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:09,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:09,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:35:09,850 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -498305663, now seen corresponding path program 1 times [2020-10-27 05:35:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:09,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847991648] [2020-10-27 05:35:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:09,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:12,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:12,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:35:12,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:12,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2651 [2020-10-27 05:35:12,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:35:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:12,830 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:35:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:12,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:12,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:12,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:35:12,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847991648] [2020-10-27 05:35:12,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:12,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:12,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272921710] [2020-10-27 05:35:12,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:12,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:12,875 INFO L87 Difference]: Start difference. First operand 8293 states and 12193 transitions. Second operand 8 states. [2020-10-27 05:35:13,132 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:35:13,979 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:35:16,027 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:35:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:19,100 INFO L93 Difference]: Finished difference Result 25350 states and 37058 transitions. [2020-10-27 05:35:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:19,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:35:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:19,122 INFO L225 Difference]: With dead ends: 25350 [2020-10-27 05:35:19,123 INFO L226 Difference]: Without dead ends: 17502 [2020-10-27 05:35:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17502 states. [2020-10-27 05:35:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17502 to 8086. [2020-10-27 05:35:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8086 states. [2020-10-27 05:35:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8086 states to 8086 states and 11858 transitions. [2020-10-27 05:35:21,012 INFO L78 Accepts]: Start accepts. Automaton has 8086 states and 11858 transitions. Word has length 61 [2020-10-27 05:35:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:21,012 INFO L481 AbstractCegarLoop]: Abstraction has 8086 states and 11858 transitions. [2020-10-27 05:35:21,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8086 states and 11858 transitions. [2020-10-27 05:35:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:35:21,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:21,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:21,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:35:21,015 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1882877063, now seen corresponding path program 1 times [2020-10-27 05:35:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:21,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701280860] [2020-10-27 05:35:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:21,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:35:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:22,906 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:35:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:22,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:22,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:22,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:22,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701280860] [2020-10-27 05:35:22,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:22,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733255378] [2020-10-27 05:35:22,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:22,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:22,948 INFO L87 Difference]: Start difference. First operand 8086 states and 11858 transitions. Second operand 8 states. [2020-10-27 05:35:23,198 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:35:24,081 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:35:25,653 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:35:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:30,357 INFO L93 Difference]: Finished difference Result 30926 states and 45123 transitions. [2020-10-27 05:35:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:30,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:35:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:30,383 INFO L225 Difference]: With dead ends: 30926 [2020-10-27 05:35:30,383 INFO L226 Difference]: Without dead ends: 23361 [2020-10-27 05:35:30,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23361 states. [2020-10-27 05:35:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23361 to 7941. [2020-10-27 05:35:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7941 states. [2020-10-27 05:35:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 11595 transitions. [2020-10-27 05:35:32,168 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 11595 transitions. Word has length 61 [2020-10-27 05:35:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:32,168 INFO L481 AbstractCegarLoop]: Abstraction has 7941 states and 11595 transitions. [2020-10-27 05:35:32,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 11595 transitions. [2020-10-27 05:35:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:35:32,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:32,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:32,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:35:32,170 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1985791164, now seen corresponding path program 1 times [2020-10-27 05:35:32,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:32,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218789389] [2020-10-27 05:35:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:32,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:35:33,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:33,759 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:35:33,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:33,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:33,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:33,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218789389] [2020-10-27 05:35:33,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:33,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:35:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762688926] [2020-10-27 05:35:33,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:35:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:35:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:35:33,790 INFO L87 Difference]: Start difference. First operand 7941 states and 11595 transitions. Second operand 10 states. [2020-10-27 05:35:34,057 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:35:37,100 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:35:37,362 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:35:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:41,313 INFO L93 Difference]: Finished difference Result 26058 states and 38182 transitions. [2020-10-27 05:35:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:35:41,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-27 05:35:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:41,339 INFO L225 Difference]: With dead ends: 26058 [2020-10-27 05:35:41,340 INFO L226 Difference]: Without dead ends: 20769 [2020-10-27 05:35:41,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:35:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2020-10-27 05:35:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11143. [2020-10-27 05:35:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11143 states. [2020-10-27 05:35:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 16286 transitions. [2020-10-27 05:35:43,858 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 16286 transitions. Word has length 64 [2020-10-27 05:35:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:43,858 INFO L481 AbstractCegarLoop]: Abstraction has 11143 states and 16286 transitions. [2020-10-27 05:35:43,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:35:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 16286 transitions. [2020-10-27 05:35:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:35:43,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:43,869 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] [2020-10-27 05:35:43,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:35:43,869 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:43,870 INFO L82 PathProgramCache]: Analyzing trace with hash 405984012, now seen corresponding path program 1 times [2020-10-27 05:35:43,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:43,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555183593] [2020-10-27 05:35:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 05:35:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 05:35:44,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:45,104 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:35:45,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:45,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:35:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:45,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:45,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555183593] [2020-10-27 05:35:45,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:45,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:35:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728051667] [2020-10-27 05:35:45,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:35:45,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:35:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:35:45,131 INFO L87 Difference]: Start difference. First operand 11143 states and 16286 transitions. Second operand 4 states. [2020-10-27 05:35:45,378 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:35:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:50,827 INFO L93 Difference]: Finished difference Result 30871 states and 44992 transitions. [2020-10-27 05:35:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:35:50,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-27 05:35:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:50,851 INFO L225 Difference]: With dead ends: 30871 [2020-10-27 05:35:50,851 INFO L226 Difference]: Without dead ends: 20272 [2020-10-27 05:35:50,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:35:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20272 states. [2020-10-27 05:35:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20272 to 18619. [2020-10-27 05:35:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18619 states. [2020-10-27 05:35:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18619 states to 18619 states and 26972 transitions. [2020-10-27 05:35:55,075 INFO L78 Accepts]: Start accepts. Automaton has 18619 states and 26972 transitions. Word has length 77 [2020-10-27 05:35:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:55,076 INFO L481 AbstractCegarLoop]: Abstraction has 18619 states and 26972 transitions. [2020-10-27 05:35:55,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:35:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 18619 states and 26972 transitions. [2020-10-27 05:35:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:35:55,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:55,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:55,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:35:55,082 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1433044957, now seen corresponding path program 1 times [2020-10-27 05:35:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:55,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124754868] [2020-10-27 05:35:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:55,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:55,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:57,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2537 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:35:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:58,180 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:35:58,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:58,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:58,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124754868] [2020-10-27 05:35:58,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:58,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:35:58,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041967170] [2020-10-27 05:35:58,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:35:58,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:58,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:35:58,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:35:58,227 INFO L87 Difference]: Start difference. First operand 18619 states and 26972 transitions. Second operand 11 states. [2020-10-27 05:35:58,914 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-27 05:35:59,346 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 05:35:59,520 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:35:59,704 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:35:59,907 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:36:00,118 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-27 05:36:00,297 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 05:36:03,508 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:36:04,223 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 168 [2020-10-27 05:36:05,202 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 172 [2020-10-27 05:36:05,868 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:36:06,942 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 168 [2020-10-27 05:36:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:33,600 INFO L93 Difference]: Finished difference Result 113973 states and 165637 transitions. [2020-10-27 05:36:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:36:33,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-10-27 05:36:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:33,824 INFO L225 Difference]: With dead ends: 113973 [2020-10-27 05:36:33,825 INFO L226 Difference]: Without dead ends: 101960 [2020-10-27 05:36:33,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:36:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101960 states. [2020-10-27 05:36:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101960 to 26587. [2020-10-27 05:36:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26587 states. [2020-10-27 05:36:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26587 states to 26587 states and 38493 transitions. [2020-10-27 05:36:42,043 INFO L78 Accepts]: Start accepts. Automaton has 26587 states and 38493 transitions. Word has length 78 [2020-10-27 05:36:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:42,043 INFO L481 AbstractCegarLoop]: Abstraction has 26587 states and 38493 transitions. [2020-10-27 05:36:42,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:36:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26587 states and 38493 transitions. [2020-10-27 05:36:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:36:42,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:42,052 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] [2020-10-27 05:36:42,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:36:42,052 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 879365833, now seen corresponding path program 1 times [2020-10-27 05:36:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:42,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78505941] [2020-10-27 05:36:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:42,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 05:36:42,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:36:42,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:42,876 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:36:42,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:42,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:42,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:42,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:36:42,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:42,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:42,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78505941] [2020-10-27 05:36:42,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:42,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:36:42,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900863559] [2020-10-27 05:36:42,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:36:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:36:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:36:42,922 INFO L87 Difference]: Start difference. First operand 26587 states and 38493 transitions. Second operand 4 states. [2020-10-27 05:36:43,198 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:36:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:57,978 INFO L93 Difference]: Finished difference Result 74149 states and 106723 transitions. [2020-10-27 05:36:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:36:57,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-27 05:36:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:58,036 INFO L225 Difference]: With dead ends: 74149 [2020-10-27 05:36:58,036 INFO L226 Difference]: Without dead ends: 48296 [2020-10-27 05:36:58,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:36:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48296 states.