/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:55:43,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:55:43,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:55:43,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:55:43,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:55:43,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:55:43,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:55:43,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:55:43,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:55:43,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:55:43,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:55:43,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:55:43,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:55:43,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:55:43,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:55:43,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:55:43,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:55:43,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:55:43,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:55:43,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:55:43,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:55:43,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:55:43,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:55:43,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:55:43,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:55:43,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:55:43,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:55:43,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:55:43,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:55:43,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:55:43,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:55:43,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:55:43,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:55:43,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:55:43,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:55:43,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:55:43,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:55:43,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:55:43,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:55:43,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:55:43,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:55:43,338 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 [2020-10-13 14:55:43,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:55:43,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:55:43,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:55:43,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:55:43,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:55:43,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:55:43,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:55:43,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:55:43,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:55:43,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:55:43,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:55:43,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:55:43,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:55:43,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:55:43,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:55:43,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:55:43,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:55:43,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:55:43,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:55:43,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:55:43,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:55:43,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:55:43,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:55:43,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:55:43,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:55:43,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:55:43,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:55:43,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:55:43,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:55:43,717 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:55:43,718 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:55:43,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c03de1c6a/6a45c1ad44204a70bb42f74f21f653e8/FLAG86ca7ce6c [2020-10-13 14:55:44,268 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:55:44,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:55:44,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c03de1c6a/6a45c1ad44204a70bb42f74f21f653e8/FLAG86ca7ce6c [2020-10-13 14:55:44,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c03de1c6a/6a45c1ad44204a70bb42f74f21f653e8 [2020-10-13 14:55:44,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:55:44,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:55:44,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:55:44,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:55:44,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:55:44,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:55:44" (1/1) ... [2020-10-13 14:55:44,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c454e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:44, skipping insertion in model container [2020-10-13 14:55:44,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:55:44" (1/1) ... [2020-10-13 14:55:44,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:55:44,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:55:44,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:55:45,007 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:55:45,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:55:45,232 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:55:45,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45 WrapperNode [2020-10-13 14:55:45,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:55:45,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:55:45,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:55:45,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:55:45,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (1/1) ... [2020-10-13 14:55:45,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:55:45,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:55:45,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:55:45,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:55:45,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (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 [2020-10-13 14:55:45,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:55:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:55:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:55:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:55:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:55:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:55:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:55:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:55:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:55:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:55:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:55:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:55:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:55:45,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:55:46,244 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:55:46,245 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:55:46,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:55:46 BoogieIcfgContainer [2020-10-13 14:55:46,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:55:46,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:55:46,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:55:46,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:55:46,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:55:44" (1/3) ... [2020-10-13 14:55:46,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502b5017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:55:46, skipping insertion in model container [2020-10-13 14:55:46,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:45" (2/3) ... [2020-10-13 14:55:46,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502b5017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:55:46, skipping insertion in model container [2020-10-13 14:55:46,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:55:46" (3/3) ... [2020-10-13 14:55:46,259 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:55:46,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:55:46,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:55:46,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:55:46,319 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:55:46,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:55:46,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:55:46,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:55:46,320 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:55:46,320 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:55:46,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:55:46,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:55:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-13 14:55:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:55:46,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:46,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:46,360 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-13 14:55:46,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:46,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514280351] [2020-10-13 14:55:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:46,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:47,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:49,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:49,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:55:49,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:55:49,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-13 14:55:49,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:49,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:55:49,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:55:49,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:55:49,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:55:49,633 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:49,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:49,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:49,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:49,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:55:49,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:49,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:55:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:49,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514280351] [2020-10-13 14:55:49,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:49,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:55:49,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240320757] [2020-10-13 14:55:49,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:55:49,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:55:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:49,731 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-13 14:55:50,169 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:55:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:51,266 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-13 14:55:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:55:51,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:55:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:51,289 INFO L225 Difference]: With dead ends: 712 [2020-10-13 14:55:51,289 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 14:55:51,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:55:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 14:55:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-13 14:55:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 14:55:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-13 14:55:51,374 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-13 14:55:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:51,375 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-13 14:55:51,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:55:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-13 14:55:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:55:51,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:51,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:51,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:55:51,379 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-13 14:55:51,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:51,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838157359] [2020-10-13 14:55:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:52,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:52,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:54,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:54,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:55:54,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:55:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2614 [2020-10-13 14:55:54,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:55:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:55:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:55:54,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:55:54,325 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:54,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:54,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:54,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:54,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:54,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:54,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:55:54,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:54,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 14:55:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:54,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838157359] [2020-10-13 14:55:54,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:54,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:55:54,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503146235] [2020-10-13 14:55:54,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:55:54,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:55:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:55:54,379 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-13 14:55:54,661 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:55:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:55,914 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-13 14:55:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:55:55,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 14:55:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:55,923 INFO L225 Difference]: With dead ends: 1483 [2020-10-13 14:55:55,924 INFO L226 Difference]: Without dead ends: 1307 [2020-10-13 14:55:55,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:55:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-13 14:55:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-13 14:55:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-13 14:55:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-13 14:55:55,995 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-13 14:55:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:55,996 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-13 14:55:55,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:55:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-13 14:55:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:55:56,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:56,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:56,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:55:56,000 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-13 14:55:56,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:56,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179291395] [2020-10-13 14:55:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:56,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:58,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:58,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:55:58,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:55:58,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-13 14:55:58,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:58,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:55:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:55:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:55:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:58,296 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:58,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:58,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:58,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:58,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:58,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:55:58,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:58,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:58,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:58,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179291395] [2020-10-13 14:55:58,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:58,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:55:58,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711249245] [2020-10-13 14:55:58,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:55:58,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:55:58,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:58,328 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 5 states. [2020-10-13 14:55:58,555 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:55:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:59,265 INFO L93 Difference]: Finished difference Result 2435 states and 4030 transitions. [2020-10-13 14:55:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:55:59,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:55:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:59,279 INFO L225 Difference]: With dead ends: 2435 [2020-10-13 14:55:59,279 INFO L226 Difference]: Without dead ends: 1858 [2020-10-13 14:55:59,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:55:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2020-10-13 14:55:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1272. [2020-10-13 14:55:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:55:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 2091 transitions. [2020-10-13 14:55:59,383 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 2091 transitions. Word has length 68 [2020-10-13 14:55:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:59,383 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 2091 transitions. [2020-10-13 14:55:59,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:55:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 2091 transitions. [2020-10-13 14:55:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:55:59,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:59,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:59,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:55:59,391 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-13 14:55:59,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:59,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687369601] [2020-10-13 14:55:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:01,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:01,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:56:01,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-13 14:56:01,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:01,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:56:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:01,683 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:01,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:01,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:01,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:56:01,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:01,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:01,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687369601] [2020-10-13 14:56:01,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:01,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:01,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763413821] [2020-10-13 14:56:01,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:01,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:01,722 INFO L87 Difference]: Start difference. First operand 1272 states and 2091 transitions. Second operand 5 states. [2020-10-13 14:56:01,949 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:56:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:02,745 INFO L93 Difference]: Finished difference Result 4707 states and 7794 transitions. [2020-10-13 14:56:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:02,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:56:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:02,767 INFO L225 Difference]: With dead ends: 4707 [2020-10-13 14:56:02,767 INFO L226 Difference]: Without dead ends: 3562 [2020-10-13 14:56:02,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2020-10-13 14:56:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2401. [2020-10-13 14:56:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2401 states. [2020-10-13 14:56:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3955 transitions. [2020-10-13 14:56:03,011 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3955 transitions. Word has length 69 [2020-10-13 14:56:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:03,012 INFO L479 AbstractCegarLoop]: Abstraction has 2401 states and 3955 transitions. [2020-10-13 14:56:03,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3955 transitions. [2020-10-13 14:56:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:56:03,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:03,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:03,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:56:03,015 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-13 14:56:03,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:03,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073367375] [2020-10-13 14:56:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:03,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:03,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:08,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:56:08,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:56:08,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:56:08,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:56:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:56:08,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:08,299 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:08,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:08,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:08,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:08,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:56:08,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:08,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:08,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:08,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:08,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:08,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073367375] [2020-10-13 14:56:08,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:08,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:08,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514196124] [2020-10-13 14:56:08,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:08,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:08,336 INFO L87 Difference]: Start difference. First operand 2401 states and 3955 transitions. Second operand 4 states. [2020-10-13 14:56:08,554 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:56:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:09,694 INFO L93 Difference]: Finished difference Result 6388 states and 10546 transitions. [2020-10-13 14:56:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:09,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:56:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:09,717 INFO L225 Difference]: With dead ends: 6388 [2020-10-13 14:56:09,717 INFO L226 Difference]: Without dead ends: 4064 [2020-10-13 14:56:09,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2020-10-13 14:56:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4062. [2020-10-13 14:56:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4062 states. [2020-10-13 14:56:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6666 transitions. [2020-10-13 14:56:09,970 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6666 transitions. Word has length 70 [2020-10-13 14:56:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:09,971 INFO L479 AbstractCegarLoop]: Abstraction has 4062 states and 6666 transitions. [2020-10-13 14:56:09,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6666 transitions. [2020-10-13 14:56:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:56:09,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:09,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:09,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:56:09,973 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-13 14:56:09,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:09,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275921128] [2020-10-13 14:56:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:10,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:15,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:56:15,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:56:15,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:56:15,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:15,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:15,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 14:56:15,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 14:56:15,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:15,341 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:15,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:56:15,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:15,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:15,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275921128] [2020-10-13 14:56:15,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:15,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:15,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125902061] [2020-10-13 14:56:15,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:15,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:15,392 INFO L87 Difference]: Start difference. First operand 4062 states and 6666 transitions. Second operand 4 states. [2020-10-13 14:56:15,663 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:56:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:16,933 INFO L93 Difference]: Finished difference Result 10751 states and 17644 transitions. [2020-10-13 14:56:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:16,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:56:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:16,975 INFO L225 Difference]: With dead ends: 10751 [2020-10-13 14:56:16,975 INFO L226 Difference]: Without dead ends: 6782 [2020-10-13 14:56:16,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2020-10-13 14:56:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 6780. [2020-10-13 14:56:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6780 states. [2020-10-13 14:56:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6780 states to 6780 states and 11050 transitions. [2020-10-13 14:56:17,452 INFO L78 Accepts]: Start accepts. Automaton has 6780 states and 11050 transitions. Word has length 70 [2020-10-13 14:56:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:17,452 INFO L479 AbstractCegarLoop]: Abstraction has 6780 states and 11050 transitions. [2020-10-13 14:56:17,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6780 states and 11050 transitions. [2020-10-13 14:56:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:56:17,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:17,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:17,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:56:17,459 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-13 14:56:17,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:17,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132909853] [2020-10-13 14:56:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:17,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:17,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:56:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:56:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:56:22,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:56:22,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:56:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:22,726 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:22,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:22,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:22,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:22,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:22,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:22,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132909853] [2020-10-13 14:56:22,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:22,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:22,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861432347] [2020-10-13 14:56:22,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:22,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:22,758 INFO L87 Difference]: Start difference. First operand 6780 states and 11050 transitions. Second operand 4 states. [2020-10-13 14:56:22,959 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:56:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:24,169 INFO L93 Difference]: Finished difference Result 17728 states and 28828 transitions. [2020-10-13 14:56:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:24,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:56:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:24,230 INFO L225 Difference]: With dead ends: 17728 [2020-10-13 14:56:24,230 INFO L226 Difference]: Without dead ends: 11043 [2020-10-13 14:56:24,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-10-13 14:56:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11007. [2020-10-13 14:56:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11007 states. [2020-10-13 14:56:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 17744 transitions. [2020-10-13 14:56:24,858 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 17744 transitions. Word has length 70 [2020-10-13 14:56:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:24,858 INFO L479 AbstractCegarLoop]: Abstraction has 11007 states and 17744 transitions. [2020-10-13 14:56:24,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 17744 transitions. [2020-10-13 14:56:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:56:24,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:24,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:24,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:56:24,860 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-13 14:56:24,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:24,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804129941] [2020-10-13 14:56:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:56:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:56:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:25,846 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:25,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:25,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:25,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:25,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:56:25,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:25,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:25,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:25,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:25,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:25,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804129941] [2020-10-13 14:56:25,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:25,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:25,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111477190] [2020-10-13 14:56:25,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:25,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:25,879 INFO L87 Difference]: Start difference. First operand 11007 states and 17744 transitions. Second operand 4 states. [2020-10-13 14:56:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:27,040 INFO L93 Difference]: Finished difference Result 26219 states and 42002 transitions. [2020-10-13 14:56:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:27,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:56:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:27,084 INFO L225 Difference]: With dead ends: 26219 [2020-10-13 14:56:27,085 INFO L226 Difference]: Without dead ends: 15273 [2020-10-13 14:56:27,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2020-10-13 14:56:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 15271. [2020-10-13 14:56:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15271 states. [2020-10-13 14:56:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15271 states to 15271 states and 23904 transitions. [2020-10-13 14:56:27,933 INFO L78 Accepts]: Start accepts. Automaton has 15271 states and 23904 transitions. Word has length 71 [2020-10-13 14:56:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:27,933 INFO L479 AbstractCegarLoop]: Abstraction has 15271 states and 23904 transitions. [2020-10-13 14:56:27,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15271 states and 23904 transitions. [2020-10-13 14:56:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:27,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:27,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:56:27,935 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash -511424921, now seen corresponding path program 1 times [2020-10-13 14:56:27,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:27,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011527026] [2020-10-13 14:56:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:27,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:28,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:28,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:28,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-13 14:56:28,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:56:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:28,552 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:28,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:28,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:28,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:28,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:28,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:28,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011527026] [2020-10-13 14:56:28,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:28,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:28,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853339022] [2020-10-13 14:56:28,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:28,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:28,581 INFO L87 Difference]: Start difference. First operand 15271 states and 23904 transitions. Second operand 4 states. [2020-10-13 14:56:28,786 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:56:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:30,388 INFO L93 Difference]: Finished difference Result 33229 states and 52164 transitions. [2020-10-13 14:56:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:30,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:56:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:30,436 INFO L225 Difference]: With dead ends: 33229 [2020-10-13 14:56:30,436 INFO L226 Difference]: Without dead ends: 18019 [2020-10-13 14:56:30,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18019 states. [2020-10-13 14:56:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18019 to 18017. [2020-10-13 14:56:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18017 states. [2020-10-13 14:56:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18017 states to 18017 states and 28150 transitions. [2020-10-13 14:56:31,258 INFO L78 Accepts]: Start accepts. Automaton has 18017 states and 28150 transitions. Word has length 72 [2020-10-13 14:56:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 18017 states and 28150 transitions. [2020-10-13 14:56:31,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18017 states and 28150 transitions. [2020-10-13 14:56:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:56:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:31,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:31,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:56:31,260 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 903278326, now seen corresponding path program 1 times [2020-10-13 14:56:31,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:31,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317082022] [2020-10-13 14:56:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:32,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:33,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:56:33,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-13 14:56:33,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:33,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:33,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:56:33,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:56:33,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:33,506 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:33,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:33,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:33,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:33,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:33,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:33,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317082022] [2020-10-13 14:56:33,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:33,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:33,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733246603] [2020-10-13 14:56:33,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:33,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:33,530 INFO L87 Difference]: Start difference. First operand 18017 states and 28150 transitions. Second operand 4 states. [2020-10-13 14:56:33,732 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:56:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:35,040 INFO L93 Difference]: Finished difference Result 40627 states and 63508 transitions. [2020-10-13 14:56:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:35,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:56:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:35,103 INFO L225 Difference]: With dead ends: 40627 [2020-10-13 14:56:35,104 INFO L226 Difference]: Without dead ends: 22673 [2020-10-13 14:56:35,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22673 states. [2020-10-13 14:56:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22673 to 22671. [2020-10-13 14:56:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22671 states. [2020-10-13 14:56:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22671 states to 22671 states and 35344 transitions. [2020-10-13 14:56:36,447 INFO L78 Accepts]: Start accepts. Automaton has 22671 states and 35344 transitions. Word has length 73 [2020-10-13 14:56:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:36,447 INFO L479 AbstractCegarLoop]: Abstraction has 22671 states and 35344 transitions. [2020-10-13 14:56:36,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 22671 states and 35344 transitions. [2020-10-13 14:56:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:56:36,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:36,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:36,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:56:36,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash 268409429, now seen corresponding path program 1 times [2020-10-13 14:56:36,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:36,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939931650] [2020-10-13 14:56:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4643 [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:56:41,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:56:41,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:56:41,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:41,366 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:41,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:41,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:56:41,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:41,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:41,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939931650] [2020-10-13 14:56:41,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:41,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:56:41,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862771900] [2020-10-13 14:56:41,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:56:41,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:56:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:41,406 INFO L87 Difference]: Start difference. First operand 22671 states and 35344 transitions. Second operand 6 states. [2020-10-13 14:56:41,654 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:56:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:44,076 INFO L93 Difference]: Finished difference Result 65822 states and 102752 transitions. [2020-10-13 14:56:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:56:44,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 14:56:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:44,183 INFO L225 Difference]: With dead ends: 65822 [2020-10-13 14:56:44,183 INFO L226 Difference]: Without dead ends: 43230 [2020-10-13 14:56:44,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:56:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43230 states. [2020-10-13 14:56:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43230 to 22671. [2020-10-13 14:56:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22671 states. [2020-10-13 14:56:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22671 states to 22671 states and 35230 transitions. [2020-10-13 14:56:45,482 INFO L78 Accepts]: Start accepts. Automaton has 22671 states and 35230 transitions. Word has length 75 [2020-10-13 14:56:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:45,482 INFO L479 AbstractCegarLoop]: Abstraction has 22671 states and 35230 transitions. [2020-10-13 14:56:45,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:56:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22671 states and 35230 transitions. [2020-10-13 14:56:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:56:45,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:45,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:45,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:56:45,484 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1201667880, now seen corresponding path program 1 times [2020-10-13 14:56:45,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:45,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739463388] [2020-10-13 14:56:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:45,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:50,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:56:50,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:56:50,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:50,744 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:50,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739463388] [2020-10-13 14:56:50,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:50,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:56:50,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812483104] [2020-10-13 14:56:50,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:56:50,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:56:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:50,773 INFO L87 Difference]: Start difference. First operand 22671 states and 35230 transitions. Second operand 6 states. [2020-10-13 14:56:51,022 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:56:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:54,912 INFO L93 Difference]: Finished difference Result 103562 states and 161322 transitions. [2020-10-13 14:56:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:56:54,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 14:56:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:55,126 INFO L225 Difference]: With dead ends: 103562 [2020-10-13 14:56:55,126 INFO L226 Difference]: Without dead ends: 80970 [2020-10-13 14:56:55,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:56:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80970 states. [2020-10-13 14:56:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80970 to 42373. [2020-10-13 14:56:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42373 states. [2020-10-13 14:56:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42373 states to 42373 states and 65608 transitions. [2020-10-13 14:56:58,031 INFO L78 Accepts]: Start accepts. Automaton has 42373 states and 65608 transitions. Word has length 78 [2020-10-13 14:56:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:58,032 INFO L479 AbstractCegarLoop]: Abstraction has 42373 states and 65608 transitions. [2020-10-13 14:56:58,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:56:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 42373 states and 65608 transitions. [2020-10-13 14:56:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:56:58,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:58,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:58,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:56:58,035 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1404910670, now seen corresponding path program 1 times [2020-10-13 14:56:58,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:58,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616784931] [2020-10-13 14:56:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3991 [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 14:57:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:03,084 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:03,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:03,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616784931] [2020-10-13 14:57:03,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:03,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:03,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606296664] [2020-10-13 14:57:03,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:03,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:03,107 INFO L87 Difference]: Start difference. First operand 42373 states and 65608 transitions. Second operand 5 states. [2020-10-13 14:57:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:06,767 INFO L93 Difference]: Finished difference Result 60220 states and 92365 transitions. [2020-10-13 14:57:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:57:06,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 14:57:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:06,854 INFO L225 Difference]: With dead ends: 60220 [2020-10-13 14:57:06,854 INFO L226 Difference]: Without dead ends: 60218 [2020-10-13 14:57:06,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60218 states. [2020-10-13 14:57:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60218 to 42781. [2020-10-13 14:57:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42781 states. [2020-10-13 14:57:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42781 states to 42781 states and 65986 transitions. [2020-10-13 14:57:09,425 INFO L78 Accepts]: Start accepts. Automaton has 42781 states and 65986 transitions. Word has length 79 [2020-10-13 14:57:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:09,425 INFO L479 AbstractCegarLoop]: Abstraction has 42781 states and 65986 transitions. [2020-10-13 14:57:09,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42781 states and 65986 transitions. [2020-10-13 14:57:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:57:09,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:09,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:09,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:57:09,429 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1075390058, now seen corresponding path program 1 times [2020-10-13 14:57:09,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:09,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707855032] [2020-10-13 14:57:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:57:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:14,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,676 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:14,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:14,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:14,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:14,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707855032] [2020-10-13 14:57:14,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:14,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:14,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018875635] [2020-10-13 14:57:14,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:14,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:14,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:14,705 INFO L87 Difference]: Start difference. First operand 42781 states and 65986 transitions. Second operand 4 states. [2020-10-13 14:57:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:17,261 INFO L93 Difference]: Finished difference Result 76870 states and 118685 transitions. [2020-10-13 14:57:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:17,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:57:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:17,313 INFO L225 Difference]: With dead ends: 76870 [2020-10-13 14:57:17,313 INFO L226 Difference]: Without dead ends: 34168 [2020-10-13 14:57:17,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34168 states. [2020-10-13 14:57:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34168 to 34090. [2020-10-13 14:57:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34090 states. [2020-10-13 14:57:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34090 states to 34090 states and 52329 transitions. [2020-10-13 14:57:20,238 INFO L78 Accepts]: Start accepts. Automaton has 34090 states and 52329 transitions. Word has length 101 [2020-10-13 14:57:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:20,239 INFO L479 AbstractCegarLoop]: Abstraction has 34090 states and 52329 transitions. [2020-10-13 14:57:20,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34090 states and 52329 transitions. [2020-10-13 14:57:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:57:20,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:20,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:20,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:57:20,241 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1793966216, now seen corresponding path program 1 times [2020-10-13 14:57:20,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:20,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806780918] [2020-10-13 14:57:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:25,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:57:25,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:57:25,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:57:25,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:25,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:25,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:57:25,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:57:25,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:25,484 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:25,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:25,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:25,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:25,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806780918] [2020-10-13 14:57:25,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:25,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:25,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550042808] [2020-10-13 14:57:25,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:25,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:25,511 INFO L87 Difference]: Start difference. First operand 34090 states and 52329 transitions. Second operand 4 states. [2020-10-13 14:57:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:27,131 INFO L93 Difference]: Finished difference Result 48792 states and 74957 transitions. [2020-10-13 14:57:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:27,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:57:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:27,153 INFO L225 Difference]: With dead ends: 48792 [2020-10-13 14:57:27,153 INFO L226 Difference]: Without dead ends: 14782 [2020-10-13 14:57:27,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2020-10-13 14:57:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 14368. [2020-10-13 14:57:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14368 states. [2020-10-13 14:57:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14368 states to 14368 states and 22012 transitions. [2020-10-13 14:57:27,968 INFO L78 Accepts]: Start accepts. Automaton has 14368 states and 22012 transitions. Word has length 101 [2020-10-13 14:57:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:27,968 INFO L479 AbstractCegarLoop]: Abstraction has 14368 states and 22012 transitions. [2020-10-13 14:57:27,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14368 states and 22012 transitions. [2020-10-13 14:57:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:57:27,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:27,971 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:27,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:57:27,971 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:27,971 INFO L82 PathProgramCache]: Analyzing trace with hash -780411721, now seen corresponding path program 1 times [2020-10-13 14:57:27,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:27,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946446481] [2020-10-13 14:57:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:57:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:33,190 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:33,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:57:33,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946446481] [2020-10-13 14:57:33,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:33,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:33,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146569267] [2020-10-13 14:57:33,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:33,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:33,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:33,215 INFO L87 Difference]: Start difference. First operand 14368 states and 22012 transitions. Second operand 4 states. [2020-10-13 14:57:33,422 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:57:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:34,918 INFO L93 Difference]: Finished difference Result 32443 states and 49738 transitions. [2020-10-13 14:57:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:34,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-10-13 14:57:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:34,940 INFO L225 Difference]: With dead ends: 32443 [2020-10-13 14:57:34,940 INFO L226 Difference]: Without dead ends: 18183 [2020-10-13 14:57:34,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2020-10-13 14:57:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 18181. [2020-10-13 14:57:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18181 states. [2020-10-13 14:57:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18181 states to 18181 states and 27797 transitions. [2020-10-13 14:57:36,003 INFO L78 Accepts]: Start accepts. Automaton has 18181 states and 27797 transitions. Word has length 102 [2020-10-13 14:57:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:36,003 INFO L479 AbstractCegarLoop]: Abstraction has 18181 states and 27797 transitions. [2020-10-13 14:57:36,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18181 states and 27797 transitions. [2020-10-13 14:57:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:57:36,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:36,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:36,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:57:36,005 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash -854832967, now seen corresponding path program 1 times [2020-10-13 14:57:36,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:36,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677093373] [2020-10-13 14:57:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:41,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:57:41,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:57:41,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:57:41,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:41,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:41,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:41,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:57:41,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:41,312 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:41,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:41,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:41,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:41,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:41,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:57:41,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677093373] [2020-10-13 14:57:41,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:41,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:41,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564907379] [2020-10-13 14:57:41,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:41,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:41,352 INFO L87 Difference]: Start difference. First operand 18181 states and 27797 transitions. Second operand 5 states. [2020-10-13 14:57:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:44,813 INFO L93 Difference]: Finished difference Result 53719 states and 82022 transitions. [2020-10-13 14:57:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:44,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-13 14:57:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:44,859 INFO L225 Difference]: With dead ends: 53719 [2020-10-13 14:57:44,860 INFO L226 Difference]: Without dead ends: 35567 [2020-10-13 14:57:44,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35567 states. [2020-10-13 14:57:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35567 to 35565. [2020-10-13 14:57:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35565 states. [2020-10-13 14:57:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35565 states to 35565 states and 54009 transitions. [2020-10-13 14:57:47,405 INFO L78 Accepts]: Start accepts. Automaton has 35565 states and 54009 transitions. Word has length 106 [2020-10-13 14:57:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:47,406 INFO L479 AbstractCegarLoop]: Abstraction has 35565 states and 54009 transitions. [2020-10-13 14:57:47,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 35565 states and 54009 transitions. [2020-10-13 14:57:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:57:47,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:47,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:47,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:57:47,409 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1915617473, now seen corresponding path program 1 times [2020-10-13 14:57:47,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:47,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723662040] [2020-10-13 14:57:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:52,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,614 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:52,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:57:52,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723662040] [2020-10-13 14:57:52,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:52,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:52,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296872284] [2020-10-13 14:57:52,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:52,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:52,637 INFO L87 Difference]: Start difference. First operand 35565 states and 54009 transitions. Second operand 4 states. [2020-10-13 14:57:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:58,353 INFO L93 Difference]: Finished difference Result 106649 states and 161955 transitions. [2020-10-13 14:57:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:58,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 14:57:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:58,448 INFO L225 Difference]: With dead ends: 106649 [2020-10-13 14:57:58,449 INFO L226 Difference]: Without dead ends: 71116 [2020-10-13 14:57:58,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71116 states. [2020-10-13 14:58:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71116 to 35567. [2020-10-13 14:58:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35567 states. [2020-10-13 14:58:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35567 states to 35567 states and 54011 transitions. [2020-10-13 14:58:01,497 INFO L78 Accepts]: Start accepts. Automaton has 35567 states and 54011 transitions. Word has length 107 [2020-10-13 14:58:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:01,497 INFO L479 AbstractCegarLoop]: Abstraction has 35567 states and 54011 transitions. [2020-10-13 14:58:01,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35567 states and 54011 transitions. [2020-10-13 14:58:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:58:01,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:01,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:01,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:58:01,501 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash -725902086, now seen corresponding path program 1 times [2020-10-13 14:58:01,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:01,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471060037] [2020-10-13 14:58:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:06,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:06,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:58:06,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:58:06,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:58:06,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:58:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:58:06,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:06,754 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:06,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:06,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:58:06,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471060037] [2020-10-13 14:58:06,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:06,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:06,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281894078] [2020-10-13 14:58:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:06,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:06,784 INFO L87 Difference]: Start difference. First operand 35567 states and 54011 transitions. Second operand 5 states. [2020-10-13 14:58:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:10,581 INFO L93 Difference]: Finished difference Result 71116 states and 107996 transitions. [2020-10-13 14:58:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:10,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 14:58:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:10,625 INFO L225 Difference]: With dead ends: 71116 [2020-10-13 14:58:10,625 INFO L226 Difference]: Without dead ends: 35567 [2020-10-13 14:58:10,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35567 states. [2020-10-13 14:58:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35567 to 35566. [2020-10-13 14:58:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35566 states. [2020-10-13 14:58:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35566 states to 35566 states and 54007 transitions. [2020-10-13 14:58:13,266 INFO L78 Accepts]: Start accepts. Automaton has 35566 states and 54007 transitions. Word has length 108 [2020-10-13 14:58:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:13,266 INFO L479 AbstractCegarLoop]: Abstraction has 35566 states and 54007 transitions. [2020-10-13 14:58:13,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 35566 states and 54007 transitions. [2020-10-13 14:58:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:58:13,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:13,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:13,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:58:13,270 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash 643682407, now seen corresponding path program 1 times [2020-10-13 14:58:13,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:13,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136606332] [2020-10-13 14:58:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:58:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:18,501 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:58:18,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136606332] [2020-10-13 14:58:18,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:18,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:18,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003246538] [2020-10-13 14:58:18,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:18,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:18,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:18,526 INFO L87 Difference]: Start difference. First operand 35566 states and 54007 transitions. Second operand 5 states. [2020-10-13 14:58:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:24,353 INFO L93 Difference]: Finished difference Result 104030 states and 157653 transitions. [2020-10-13 14:58:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:24,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 14:58:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:24,452 INFO L225 Difference]: With dead ends: 104030 [2020-10-13 14:58:24,453 INFO L226 Difference]: Without dead ends: 68503 [2020-10-13 14:58:24,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68503 states. [2020-10-13 14:58:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68503 to 68501. [2020-10-13 14:58:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68501 states. [2020-10-13 14:58:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68501 states to 68501 states and 102971 transitions. [2020-10-13 14:58:31,339 INFO L78 Accepts]: Start accepts. Automaton has 68501 states and 102971 transitions. Word has length 108 [2020-10-13 14:58:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:31,340 INFO L479 AbstractCegarLoop]: Abstraction has 68501 states and 102971 transitions. [2020-10-13 14:58:31,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 68501 states and 102971 transitions. [2020-10-13 14:58:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:58:31,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:31,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:31,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:58:31,345 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -55079094, now seen corresponding path program 1 times [2020-10-13 14:58:31,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:31,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860371306] [2020-10-13 14:58:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:58:36,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,725 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:36,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:36,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:36,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:58:36,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860371306] [2020-10-13 14:58:36,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:36,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:36,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972842550] [2020-10-13 14:58:36,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:36,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:36,756 INFO L87 Difference]: Start difference. First operand 68501 states and 102971 transitions. Second operand 5 states. [2020-10-13 14:58:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:46,292 INFO L93 Difference]: Finished difference Result 170344 states and 255642 transitions. [2020-10-13 14:58:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:46,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 14:58:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:46,446 INFO L225 Difference]: With dead ends: 170344 [2020-10-13 14:58:46,446 INFO L226 Difference]: Without dead ends: 101896 [2020-10-13 14:58:46,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101896 states. [2020-10-13 14:58:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101896 to 101894. [2020-10-13 14:58:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101894 states. [2020-10-13 14:58:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101894 states to 101894 states and 151601 transitions. [2020-10-13 14:58:57,534 INFO L78 Accepts]: Start accepts. Automaton has 101894 states and 151601 transitions. Word has length 108 [2020-10-13 14:58:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:57,534 INFO L479 AbstractCegarLoop]: Abstraction has 101894 states and 151601 transitions. [2020-10-13 14:58:57,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 101894 states and 151601 transitions. [2020-10-13 14:58:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:58:57,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:57,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:57,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:58:57,540 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1933625183, now seen corresponding path program 1 times [2020-10-13 14:58:57,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:57,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010310466] [2020-10-13 14:58:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:57,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:02,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:59:02,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:02,759 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:02,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:02,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:02,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:02,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:02,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:02,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:59:02,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010310466] [2020-10-13 14:59:02,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:02,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:02,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051298584] [2020-10-13 14:59:02,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:02,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:02,782 INFO L87 Difference]: Start difference. First operand 101894 states and 151601 transitions. Second operand 4 states. [2020-10-13 14:59:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:17,895 INFO L93 Difference]: Finished difference Result 241061 states and 359788 transitions. [2020-10-13 14:59:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:17,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 14:59:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:18,115 INFO L225 Difference]: With dead ends: 241061 [2020-10-13 14:59:18,116 INFO L226 Difference]: Without dead ends: 139514 [2020-10-13 14:59:18,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139514 states. [2020-10-13 14:59:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139514 to 102674. [2020-10-13 14:59:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102674 states. [2020-10-13 14:59:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102674 states to 102674 states and 152633 transitions. [2020-10-13 14:59:28,099 INFO L78 Accepts]: Start accepts. Automaton has 102674 states and 152633 transitions. Word has length 109 [2020-10-13 14:59:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:28,099 INFO L479 AbstractCegarLoop]: Abstraction has 102674 states and 152633 transitions. [2020-10-13 14:59:28,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 102674 states and 152633 transitions. [2020-10-13 14:59:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:59:28,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:28,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:28,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:59:28,104 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -955678723, now seen corresponding path program 1 times [2020-10-13 14:59:28,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:28,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305103813] [2020-10-13 14:59:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:28,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:29,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking...