/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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:13:53,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:13:53,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:13:53,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:13:53,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:13:53,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:13:53,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:13:53,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:13:53,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:13:53,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:13:53,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:13:53,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:13:53,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:13:53,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:13:53,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:13:53,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:13:53,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:13:53,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:13:53,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:13:53,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:13:53,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:13:53,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:13:53,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:13:53,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:13:53,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:13:53,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:13:53,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:13:53,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:13:53,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:13:53,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:13:53,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:13:53,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:13:53,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:13:53,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:13:53,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:13:53,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:13:53,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:13:53,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:13:53,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:13:53,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:13:53,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:13:53,322 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 05:13:53,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:13:53,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:13:53,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:13:53,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:13:53,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:13:53,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:13:53,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:13:53,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:13:53,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:13:53,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:13:53,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:13:53,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:13:53,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:13:53,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:13:53,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:13:53,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:13:53,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:13:53,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:13:53,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:13:53,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:13:53,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:13:53,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:13:53,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:13:53,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:13:53,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:13:53,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:13:53,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:13:53,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:13:53,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:13:53,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:13:53,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:13:53,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:13:53,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:13:53,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:13:53,843 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:13:53,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 05:13:53,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/435de6ab9/047b72aec126416b91dda0d50eb1e1a4/FLAGda7417a7d [2020-10-27 05:13:54,531 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:13:54,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 05:13:54,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/435de6ab9/047b72aec126416b91dda0d50eb1e1a4/FLAGda7417a7d [2020-10-27 05:13:54,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/435de6ab9/047b72aec126416b91dda0d50eb1e1a4 [2020-10-27 05:13:54,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:13:54,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:13:54,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:13:54,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:13:54,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:13:54,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:13:54" (1/1) ... [2020-10-27 05:13:54,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669fab04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:54, skipping insertion in model container [2020-10-27 05:13:54,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:13:54" (1/1) ... [2020-10-27 05:13:54,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:13:54,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:13:55,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:13:55,396 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:13:55,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:13:55,544 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:13:55,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55 WrapperNode [2020-10-27 05:13:55,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:13:55,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:13:55,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:13:55,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:13:55,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (1/1) ... [2020-10-27 05:13:55,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:13:55,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:13:55,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:13:55,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:13:55,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (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 05:13:55,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:13:55,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:13:55,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:13:55,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:13:55,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:13:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:13:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:13:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:13:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:13:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:13:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:13:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:13:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:13:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:13:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:13:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:13:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:13:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:13:56,451 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:13:56,451 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:13:56,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:13:56 BoogieIcfgContainer [2020-10-27 05:13:56,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:13:56,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:13:56,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:13:56,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:13:56,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:13:54" (1/3) ... [2020-10-27 05:13:56,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166f5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:13:56, skipping insertion in model container [2020-10-27 05:13:56,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:13:55" (2/3) ... [2020-10-27 05:13:56,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166f5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:13:56, skipping insertion in model container [2020-10-27 05:13:56,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:13:56" (3/3) ... [2020-10-27 05:13:56,463 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 05:13:56,476 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:13:56,481 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:13:56,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:13:56,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:13:56,528 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:13:56,528 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:13:56,528 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:13:56,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:13:56,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:13:56,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:13:56,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:13:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-10-27 05:13:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:13:56,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:56,559 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] [2020-10-27 05:13:56,559 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -533712479, now seen corresponding path program 1 times [2020-10-27 05:13:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:56,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80519076] [2020-10-27 05:13:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:01,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:14:01,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4912 [2020-10-27 05:14:01,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:14:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:14:01,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:14:02,176 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:02,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:02,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:02,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:02,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:14:02,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:02,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:02,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:02,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:14:02,228 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 05:14:02,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80519076] [2020-10-27 05:14:02,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:02,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:14:02,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665563641] [2020-10-27 05:14:02,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:02,254 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 7 states. [2020-10-27 05:14:02,642 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:14:03,495 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:03,739 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:04,022 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:14:04,357 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:04,613 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:04,822 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:14:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:04,901 INFO L93 Difference]: Finished difference Result 528 states and 830 transitions. [2020-10-27 05:14:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:04,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-27 05:14:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:04,919 INFO L225 Difference]: With dead ends: 528 [2020-10-27 05:14:04,920 INFO L226 Difference]: Without dead ends: 438 [2020-10-27 05:14:04,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:14:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-27 05:14:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 129. [2020-10-27 05:14:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 05:14:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2020-10-27 05:14:05,001 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 52 [2020-10-27 05:14:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:05,002 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2020-10-27 05:14:05,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2020-10-27 05:14:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:05,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:05,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:05,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:14:05,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 68530966, now seen corresponding path program 1 times [2020-10-27 05:14:05,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:05,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083659544] [2020-10-27 05:14:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:10,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:10,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:10,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:14:10,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:10,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:14:10,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,436 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:10,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:10,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:10,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:10,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:10,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:14:10,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:10,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:10,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,513 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 05:14:10,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083659544] [2020-10-27 05:14:10,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:10,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585801719] [2020-10-27 05:14:10,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:10,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:10,531 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand 7 states. [2020-10-27 05:14:10,759 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:11,351 INFO L93 Difference]: Finished difference Result 376 states and 574 transitions. [2020-10-27 05:14:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:11,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:14:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:11,355 INFO L225 Difference]: With dead ends: 376 [2020-10-27 05:14:11,356 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 05:14:11,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 05:14:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-27 05:14:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 05:14:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 243 transitions. [2020-10-27 05:14:11,385 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 243 transitions. Word has length 54 [2020-10-27 05:14:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:11,385 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 243 transitions. [2020-10-27 05:14:11,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 243 transitions. [2020-10-27 05:14:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:11,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:11,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:11,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:14:11,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 804632848, now seen corresponding path program 1 times [2020-10-27 05:14:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681739562] [2020-10-27 05:14:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:11,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:16,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:16,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:16,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:14:16,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:16,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:16,729 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:16,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:16,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:16,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:16,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:16,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:14:16,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:16,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:16,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:16,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:16,785 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 05:14:16,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681739562] [2020-10-27 05:14:16,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:16,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727763641] [2020-10-27 05:14:16,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:16,789 INFO L87 Difference]: Start difference. First operand 166 states and 243 transitions. Second operand 7 states. [2020-10-27 05:14:17,069 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:14:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:17,810 INFO L93 Difference]: Finished difference Result 376 states and 572 transitions. [2020-10-27 05:14:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:17,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:14:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:17,814 INFO L225 Difference]: With dead ends: 376 [2020-10-27 05:14:17,815 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 05:14:17,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:14:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 05:14:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 186. [2020-10-27 05:14:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 05:14:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 271 transitions. [2020-10-27 05:14:17,860 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 271 transitions. Word has length 54 [2020-10-27 05:14:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:17,860 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 271 transitions. [2020-10-27 05:14:17,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 271 transitions. [2020-10-27 05:14:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:17,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:17,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:17,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:14:17,863 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash 574720230, now seen corresponding path program 1 times [2020-10-27 05:14:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:17,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146426695] [2020-10-27 05:14:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:17,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:20,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2649 [2020-10-27 05:14:20,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:14:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:14:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:14:20,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,815 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:20,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:20,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:20,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:20,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:20,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:20,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:20,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,868 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 05:14:20,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146426695] [2020-10-27 05:14:20,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:20,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:20,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967385190] [2020-10-27 05:14:20,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:14:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:14:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:20,871 INFO L87 Difference]: Start difference. First operand 186 states and 271 transitions. Second operand 5 states. [2020-10-27 05:14:21,136 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:14:21,775 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:14:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:21,896 INFO L93 Difference]: Finished difference Result 506 states and 768 transitions. [2020-10-27 05:14:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:14:21,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-27 05:14:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:21,904 INFO L225 Difference]: With dead ends: 506 [2020-10-27 05:14:21,905 INFO L226 Difference]: Without dead ends: 407 [2020-10-27 05:14:21,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-27 05:14:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 401. [2020-10-27 05:14:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-27 05:14:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 602 transitions. [2020-10-27 05:14:21,969 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 602 transitions. Word has length 54 [2020-10-27 05:14:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:21,972 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 602 transitions. [2020-10-27 05:14:21,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:14:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 602 transitions. [2020-10-27 05:14:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:21,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:21,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:21,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:14:21,986 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1196249863, now seen corresponding path program 1 times [2020-10-27 05:14:21,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:21,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880110887] [2020-10-27 05:14:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:22,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3111 [2020-10-27 05:14:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:14:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,429 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:25,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:14:25,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:14:25,468 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 05:14:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880110887] [2020-10-27 05:14:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:25,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:14:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895182634] [2020-10-27 05:14:25,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:25,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:25,473 INFO L87 Difference]: Start difference. First operand 401 states and 602 transitions. Second operand 7 states. [2020-10-27 05:14:25,792 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:14:26,425 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:14:26,677 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:26,891 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:27,350 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:27,595 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:27,853 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:27,899 INFO L93 Difference]: Finished difference Result 1443 states and 2220 transitions. [2020-10-27 05:14:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:27,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:14:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:27,907 INFO L225 Difference]: With dead ends: 1443 [2020-10-27 05:14:27,907 INFO L226 Difference]: Without dead ends: 1166 [2020-10-27 05:14:27,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:14:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2020-10-27 05:14:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 401. [2020-10-27 05:14:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-27 05:14:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 599 transitions. [2020-10-27 05:14:27,970 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 599 transitions. Word has length 54 [2020-10-27 05:14:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:27,971 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 599 transitions. [2020-10-27 05:14:27,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 599 transitions. [2020-10-27 05:14:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:27,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:27,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:27,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:14:27,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:27,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1405130140, now seen corresponding path program 1 times [2020-10-27 05:14:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:27,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858320297] [2020-10-27 05:14:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:28,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:14:33,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:33,389 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:33,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:33,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:33,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:33,452 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 05:14:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858320297] [2020-10-27 05:14:33,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:33,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:33,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832156473] [2020-10-27 05:14:33,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:33,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:33,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:33,458 INFO L87 Difference]: Start difference. First operand 401 states and 599 transitions. Second operand 7 states. [2020-10-27 05:14:33,700 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:34,312 INFO L93 Difference]: Finished difference Result 1073 states and 1631 transitions. [2020-10-27 05:14:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:34,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:14:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:34,319 INFO L225 Difference]: With dead ends: 1073 [2020-10-27 05:14:34,320 INFO L226 Difference]: Without dead ends: 734 [2020-10-27 05:14:34,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-27 05:14:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 381. [2020-10-27 05:14:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-27 05:14:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 565 transitions. [2020-10-27 05:14:34,382 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 565 transitions. Word has length 54 [2020-10-27 05:14:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:34,382 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 565 transitions. [2020-10-27 05:14:34,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 565 transitions. [2020-10-27 05:14:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:14:34,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:34,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:34,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:14:34,384 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2043387742, now seen corresponding path program 1 times [2020-10-27 05:14:34,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:34,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821207966] [2020-10-27 05:14:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:34,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:39,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:14:39,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:39,755 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:39,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:39,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:39,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:39,805 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 05:14:39,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821207966] [2020-10-27 05:14:39,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:39,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542403246] [2020-10-27 05:14:39,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:14:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:14:39,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:14:39,815 INFO L87 Difference]: Start difference. First operand 381 states and 565 transitions. Second operand 7 states. [2020-10-27 05:14:40,053 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:40,641 INFO L93 Difference]: Finished difference Result 875 states and 1328 transitions. [2020-10-27 05:14:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:40,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:14:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:40,646 INFO L225 Difference]: With dead ends: 875 [2020-10-27 05:14:40,646 INFO L226 Difference]: Without dead ends: 645 [2020-10-27 05:14:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2020-10-27 05:14:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 357. [2020-10-27 05:14:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 05:14:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 530 transitions. [2020-10-27 05:14:40,704 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 530 transitions. Word has length 54 [2020-10-27 05:14:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:40,706 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 530 transitions. [2020-10-27 05:14:40,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:14:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 530 transitions. [2020-10-27 05:14:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:14:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:40,707 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 05:14:40,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:14:40,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:40,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1630291214, now seen corresponding path program 1 times [2020-10-27 05:14:40,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:40,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320484892] [2020-10-27 05:14:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:40,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:41,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:14:41,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 05:14:41,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:41,831 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:41,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:41,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:41,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:41,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:14:41,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:41,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:41,863 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 05:14:41,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320484892] [2020-10-27 05:14:41,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:41,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:41,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284455719] [2020-10-27 05:14:41,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:41,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:41,866 INFO L87 Difference]: Start difference. First operand 357 states and 530 transitions. Second operand 4 states. [2020-10-27 05:14:42,107 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:42,643 INFO L93 Difference]: Finished difference Result 701 states and 1064 transitions. [2020-10-27 05:14:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:42,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 05:14:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:42,647 INFO L225 Difference]: With dead ends: 701 [2020-10-27 05:14:42,647 INFO L226 Difference]: Without dead ends: 494 [2020-10-27 05:14:42,648 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 05:14:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-10-27 05:14:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 491. [2020-10-27 05:14:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-27 05:14:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 740 transitions. [2020-10-27 05:14:42,722 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 740 transitions. Word has length 55 [2020-10-27 05:14:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:42,723 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 740 transitions. [2020-10-27 05:14:42,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 740 transitions. [2020-10-27 05:14:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:14:42,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:42,724 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 05:14:42,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:14:42,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash 431159113, now seen corresponding path program 1 times [2020-10-27 05:14:42,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:42,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739326611] [2020-10-27 05:14:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:44,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1806 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:14:44,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:44,809 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:44,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:44,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:44,855 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 05:14:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739326611] [2020-10-27 05:14:44,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:44,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:44,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281622849] [2020-10-27 05:14:44,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:44,857 INFO L87 Difference]: Start difference. First operand 491 states and 740 transitions. Second operand 6 states. [2020-10-27 05:14:45,125 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:45,736 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:45,867 INFO L93 Difference]: Finished difference Result 1287 states and 1966 transitions. [2020-10-27 05:14:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:14:45,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:14:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:45,873 INFO L225 Difference]: With dead ends: 1287 [2020-10-27 05:14:45,873 INFO L226 Difference]: Without dead ends: 830 [2020-10-27 05:14:45,875 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 05:14:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2020-10-27 05:14:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 827. [2020-10-27 05:14:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-10-27 05:14:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1253 transitions. [2020-10-27 05:14:45,998 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1253 transitions. Word has length 56 [2020-10-27 05:14:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:45,998 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1253 transitions. [2020-10-27 05:14:45,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1253 transitions. [2020-10-27 05:14:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:14:45,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:45,999 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 05:14:45,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:14:45,999 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2005386194, now seen corresponding path program 1 times [2020-10-27 05:14:46,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:46,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273061111] [2020-10-27 05:14:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:46,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:46,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:14:46,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:14:46,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:46,801 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:46,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:46,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:46,836 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 05:14:46,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273061111] [2020-10-27 05:14:46,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:46,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248678477] [2020-10-27 05:14:46,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:46,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:46,842 INFO L87 Difference]: Start difference. First operand 827 states and 1253 transitions. Second operand 4 states. [2020-10-27 05:14:47,064 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:47,747 INFO L93 Difference]: Finished difference Result 2236 states and 3411 transitions. [2020-10-27 05:14:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:47,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 05:14:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:47,756 INFO L225 Difference]: With dead ends: 2236 [2020-10-27 05:14:47,757 INFO L226 Difference]: Without dead ends: 1451 [2020-10-27 05:14:47,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2020-10-27 05:14:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1448. [2020-10-27 05:14:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-10-27 05:14:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2183 transitions. [2020-10-27 05:14:48,029 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2183 transitions. Word has length 56 [2020-10-27 05:14:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:48,030 INFO L481 AbstractCegarLoop]: Abstraction has 1448 states and 2183 transitions. [2020-10-27 05:14:48,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2183 transitions. [2020-10-27 05:14:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:48,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:48,031 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 05:14:48,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:14:48,031 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 479495950, now seen corresponding path program 1 times [2020-10-27 05:14:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:48,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167774327] [2020-10-27 05:14:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:48,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:14:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:49,091 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:49,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:49,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:49,137 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 05:14:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167774327] [2020-10-27 05:14:49,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:49,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355048489] [2020-10-27 05:14:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:49,139 INFO L87 Difference]: Start difference. First operand 1448 states and 2183 transitions. Second operand 6 states. [2020-10-27 05:14:49,384 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:49,915 INFO L93 Difference]: Finished difference Result 2856 states and 4323 transitions. [2020-10-27 05:14:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:14:49,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 05:14:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:49,924 INFO L225 Difference]: With dead ends: 2856 [2020-10-27 05:14:49,924 INFO L226 Difference]: Without dead ends: 1448 [2020-10-27 05:14:49,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2020-10-27 05:14:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1448. [2020-10-27 05:14:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-10-27 05:14:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2164 transitions. [2020-10-27 05:14:50,131 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2164 transitions. Word has length 57 [2020-10-27 05:14:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:50,131 INFO L481 AbstractCegarLoop]: Abstraction has 1448 states and 2164 transitions. [2020-10-27 05:14:50,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2164 transitions. [2020-10-27 05:14:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:50,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:50,132 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 05:14:50,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:14:50,133 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1453459059, now seen corresponding path program 1 times [2020-10-27 05:14:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:50,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361076850] [2020-10-27 05:14:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:50,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:50,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:14:50,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-27 05:14:50,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:14:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 05:14:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:50,692 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:50,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:50,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:50,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:50,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:50,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:50,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:50,723 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 05:14:50,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361076850] [2020-10-27 05:14:50,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:50,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:50,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160997083] [2020-10-27 05:14:50,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:50,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:50,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:50,725 INFO L87 Difference]: Start difference. First operand 1448 states and 2164 transitions. Second operand 4 states. [2020-10-27 05:14:50,973 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:51,748 INFO L93 Difference]: Finished difference Result 3951 states and 5907 transitions. [2020-10-27 05:14:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:51,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-27 05:14:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:51,763 INFO L225 Difference]: With dead ends: 3951 [2020-10-27 05:14:51,763 INFO L226 Difference]: Without dead ends: 2551 [2020-10-27 05:14:51,767 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 05:14:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2020-10-27 05:14:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2548. [2020-10-27 05:14:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2548 states. [2020-10-27 05:14:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 3757 transitions. [2020-10-27 05:14:52,120 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 3757 transitions. Word has length 57 [2020-10-27 05:14:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:52,121 INFO L481 AbstractCegarLoop]: Abstraction has 2548 states and 3757 transitions. [2020-10-27 05:14:52,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 3757 transitions. [2020-10-27 05:14:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:52,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:52,122 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 05:14:52,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:14:52,122 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1471710427, now seen corresponding path program 1 times [2020-10-27 05:14:52,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:52,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41008308] [2020-10-27 05:14:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:52,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 05:14:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:52,514 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:52,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:52,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:52,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:52,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:52,539 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 05:14:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41008308] [2020-10-27 05:14:52,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:52,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:52,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96909557] [2020-10-27 05:14:52,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:52,541 INFO L87 Difference]: Start difference. First operand 2548 states and 3757 transitions. Second operand 4 states. [2020-10-27 05:14:52,782 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:53,701 INFO L93 Difference]: Finished difference Result 6962 states and 10217 transitions. [2020-10-27 05:14:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:53,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 05:14:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:53,723 INFO L225 Difference]: With dead ends: 6962 [2020-10-27 05:14:53,723 INFO L226 Difference]: Without dead ends: 4464 [2020-10-27 05:14:53,731 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 05:14:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2020-10-27 05:14:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 4443. [2020-10-27 05:14:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4443 states. [2020-10-27 05:14:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 6418 transitions. [2020-10-27 05:14:54,442 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 6418 transitions. Word has length 58 [2020-10-27 05:14:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:54,443 INFO L481 AbstractCegarLoop]: Abstraction has 4443 states and 6418 transitions. [2020-10-27 05:14:54,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 6418 transitions. [2020-10-27 05:14:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:54,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:54,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:54,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:14:54,444 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1172801319, now seen corresponding path program 1 times [2020-10-27 05:14:54,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:54,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986442236] [2020-10-27 05:14:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:54,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:14:54,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:55,004 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:55,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:55,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:55,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:55,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:14:55,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:55,043 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 05:14:55,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986442236] [2020-10-27 05:14:55,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:55,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:55,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777306166] [2020-10-27 05:14:55,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:55,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:55,045 INFO L87 Difference]: Start difference. First operand 4443 states and 6418 transitions. Second operand 6 states. [2020-10-27 05:14:55,305 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:55,926 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:56,801 INFO L93 Difference]: Finished difference Result 13193 states and 19046 transitions. [2020-10-27 05:14:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:14:56,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-27 05:14:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:56,839 INFO L225 Difference]: With dead ends: 13193 [2020-10-27 05:14:56,839 INFO L226 Difference]: Without dead ends: 8782 [2020-10-27 05:14:56,852 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 05:14:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8782 states. [2020-10-27 05:14:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8782 to 8779. [2020-10-27 05:14:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8779 states. [2020-10-27 05:14:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8779 states to 8779 states and 12586 transitions. [2020-10-27 05:14:58,104 INFO L78 Accepts]: Start accepts. Automaton has 8779 states and 12586 transitions. Word has length 59 [2020-10-27 05:14:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:58,104 INFO L481 AbstractCegarLoop]: Abstraction has 8779 states and 12586 transitions. [2020-10-27 05:14:58,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8779 states and 12586 transitions. [2020-10-27 05:14:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:58,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:58,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:58,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:14:58,105 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1944664972, now seen corresponding path program 1 times [2020-10-27 05:14:58,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:58,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396773103] [2020-10-27 05:14:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:14:58,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 05:14:58,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:14:58,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:58,486 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:58,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:58,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:58,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:58,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:58,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:58,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:58,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:58,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:58,511 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 05:14:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396773103] [2020-10-27 05:14:58,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:58,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:58,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719468596] [2020-10-27 05:14:58,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:14:58,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:14:58,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:58,512 INFO L87 Difference]: Start difference. First operand 8779 states and 12586 transitions. Second operand 5 states. [2020-10-27 05:15:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:00,592 INFO L93 Difference]: Finished difference Result 14440 states and 20659 transitions. [2020-10-27 05:15:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:15:00,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 05:15:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:00,638 INFO L225 Difference]: With dead ends: 14440 [2020-10-27 05:15:00,638 INFO L226 Difference]: Without dead ends: 14437 [2020-10-27 05:15:00,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2020-10-27 05:15:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 9035. [2020-10-27 05:15:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9035 states. [2020-10-27 05:15:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9035 states to 9035 states and 12762 transitions. [2020-10-27 05:15:02,023 INFO L78 Accepts]: Start accepts. Automaton has 9035 states and 12762 transitions. Word has length 59 [2020-10-27 05:15:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:02,023 INFO L481 AbstractCegarLoop]: Abstraction has 9035 states and 12762 transitions. [2020-10-27 05:15:02,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:15:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9035 states and 12762 transitions. [2020-10-27 05:15:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:15:02,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:02,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:02,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:15:02,026 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash -578073059, now seen corresponding path program 1 times [2020-10-27 05:15:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:02,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987479759] [2020-10-27 05:15:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:04,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:15:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:07,464 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:07,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:07,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:07,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:15:07,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:15:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:07,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987479759] [2020-10-27 05:15:07,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:15:07,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:15:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023726889] [2020-10-27 05:15:07,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:07,619 INFO L87 Difference]: Start difference. First operand 9035 states and 12762 transitions. Second operand 11 states. [2020-10-27 05:15:07,902 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:15:09,698 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:15:09,993 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:15:10,222 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:15:13,055 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:18,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:18,424 INFO L93 Difference]: Finished difference Result 66079 states and 92058 transitions. [2020-10-27 05:15:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:15:18,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-27 05:15:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:18,578 INFO L225 Difference]: With dead ends: 66079 [2020-10-27 05:15:18,579 INFO L226 Difference]: Without dead ends: 57076 [2020-10-27 05:15:18,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:15:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2020-10-27 05:15:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 21779. [2020-10-27 05:15:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21779 states. [2020-10-27 05:15:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21779 states to 21779 states and 30418 transitions. [2020-10-27 05:15:22,481 INFO L78 Accepts]: Start accepts. Automaton has 21779 states and 30418 transitions. Word has length 81 [2020-10-27 05:15:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:22,482 INFO L481 AbstractCegarLoop]: Abstraction has 21779 states and 30418 transitions. [2020-10-27 05:15:22,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:15:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21779 states and 30418 transitions. [2020-10-27 05:15:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:15:22,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:22,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:22,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:15:22,486 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 158028823, now seen corresponding path program 1 times [2020-10-27 05:15:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:22,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045162985] [2020-10-27 05:15:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:15:27,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:27,927 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:27,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:27,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:27,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:27,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:15:27,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:27,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:27,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:27,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:27,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:28,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045162985] [2020-10-27 05:15:28,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:15:28,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:15:28,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841393742] [2020-10-27 05:15:28,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:28,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:28,019 INFO L87 Difference]: Start difference. First operand 21779 states and 30418 transitions. Second operand 11 states. [2020-10-27 05:15:28,290 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:15:30,412 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:15:30,674 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:15:30,927 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:15:33,426 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:41,910 INFO L93 Difference]: Finished difference Result 89257 states and 124018 transitions. [2020-10-27 05:15:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 05:15:41,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-27 05:15:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:42,065 INFO L225 Difference]: With dead ends: 89257 [2020-10-27 05:15:42,065 INFO L226 Difference]: Without dead ends: 75624 [2020-10-27 05:15:42,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:15:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75624 states. [2020-10-27 05:15:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75624 to 33891. [2020-10-27 05:15:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33891 states. [2020-10-27 05:15:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33891 states to 33891 states and 47220 transitions. [2020-10-27 05:15:47,976 INFO L78 Accepts]: Start accepts. Automaton has 33891 states and 47220 transitions. Word has length 81 [2020-10-27 05:15:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:47,977 INFO L481 AbstractCegarLoop]: Abstraction has 33891 states and 47220 transitions. [2020-10-27 05:15:47,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:15:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 33891 states and 47220 transitions. [2020-10-27 05:15:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:47,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:47,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:15:47,981 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 602256255, now seen corresponding path program 1 times [2020-10-27 05:15:47,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:47,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863028121] [2020-10-27 05:15:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:53,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:53,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:53,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:15:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:53,393 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:53,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:53,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:53,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863028121] [2020-10-27 05:15:53,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:15:53,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:15:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469405273] [2020-10-27 05:15:53,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:53,443 INFO L87 Difference]: Start difference. First operand 33891 states and 47220 transitions. Second operand 11 states. [2020-10-27 05:15:53,880 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:15:56,441 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:15:56,804 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:15:57,053 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:16:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:22,520 INFO L93 Difference]: Finished difference Result 196261 states and 270295 transitions. [2020-10-27 05:16:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:16:22,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-27 05:16:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:22,991 INFO L225 Difference]: With dead ends: 196261 [2020-10-27 05:16:22,992 INFO L226 Difference]: Without dead ends: 162402 [2020-10-27 05:16:23,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:16:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162402 states. [2020-10-27 05:16:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162402 to 82591. [2020-10-27 05:16:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82591 states. [2020-10-27 05:16:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82591 states to 82591 states and 114530 transitions. [2020-10-27 05:16:37,386 INFO L78 Accepts]: Start accepts. Automaton has 82591 states and 114530 transitions. Word has length 82 [2020-10-27 05:16:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:37,386 INFO L481 AbstractCegarLoop]: Abstraction has 82591 states and 114530 transitions. [2020-10-27 05:16:37,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:16:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 82591 states and 114530 transitions. [2020-10-27 05:16:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:16:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:37,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:37,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:16:37,394 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2079549961, now seen corresponding path program 1 times [2020-10-27 05:16:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:37,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855290538] [2020-10-27 05:16:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:37,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:42,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:16:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:16:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:16:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:16:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:16:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:42,814 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:42,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855290538] [2020-10-27 05:16:42,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:16:42,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:16:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395450819] [2020-10-27 05:16:42,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:16:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:16:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:42,870 INFO L87 Difference]: Start difference. First operand 82591 states and 114530 transitions. Second operand 11 states. [2020-10-27 05:16:43,168 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:16:46,418 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:16:46,685 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:16:46,969 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:17:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:29,427 INFO L93 Difference]: Finished difference Result 336151 states and 462440 transitions. [2020-10-27 05:17:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.