/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:25:53,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:25:53,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:25:53,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:25:53,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:25:53,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:25:53,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:25:53,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:25:53,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:25:53,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:25:53,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:25:53,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:25:53,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:25:53,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:25:53,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:25:53,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:25:53,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:25:53,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:25:53,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:25:53,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:25:53,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:25:53,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:25:53,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:25:53,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:25:53,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:25:53,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:25:53,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:25:53,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:25:53,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:25:53,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:25:53,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:25:53,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:25:53,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:25:53,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:25:53,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:25:53,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:25:53,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:25:53,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:25:53,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:25:53,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:25:53,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:25:53,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:25:53,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:25:53,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:25:53,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:25:53,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:25:53,303 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:25:53,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:25:53,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:25:53,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:25:53,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:25:53,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:25:53,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:25:53,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:25:53,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:25:53,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:25:53,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:25:53,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:25:53,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:25:53,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:25:53,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:25:53,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:25:53,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:25:53,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:25:53,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:25:53,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:25:53,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:25:53,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:25:53,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:25:53,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:25:53,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:25:53,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:25:53,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:25:53,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:25:53,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:25:53,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:25:53,754 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:25:53,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:25:53,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80f222b26/a4c65fac34d14fe18feb12e9c7616d2c/FLAG0867ca330 [2020-10-28 00:25:54,446 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:25:54,446 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 [2020-10-28 00:25:54,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80f222b26/a4c65fac34d14fe18feb12e9c7616d2c/FLAG0867ca330 [2020-10-28 00:25:54,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80f222b26/a4c65fac34d14fe18feb12e9c7616d2c [2020-10-28 00:25:54,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:25:54,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:25:54,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:25:54,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:25:54,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:25:54,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:25:54" (1/1) ... [2020-10-28 00:25:54,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67787bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:54, skipping insertion in model container [2020-10-28 00:25:54,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:25:54" (1/1) ... [2020-10-28 00:25:54,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:25:54,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:25:55,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:25:55,283 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:25:55,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:25:55,462 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:25:55,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55 WrapperNode [2020-10-28 00:25:55,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:25:55,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:25:55,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:25:55,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:25:55,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... [2020-10-28 00:25:55,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:25:55,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:25:55,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:25:55,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:25:55,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:25:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:25:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:25:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:25:55,663 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:25:55,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:25:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:25:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:25:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:25:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:25:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:25:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:25:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:25:56,593 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:25:56,593 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:25:56,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:25:56 BoogieIcfgContainer [2020-10-28 00:25:56,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:25:56,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:25:56,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:25:56,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:25:56,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:25:54" (1/3) ... [2020-10-28 00:25:56,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551bde52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:25:56, skipping insertion in model container [2020-10-28 00:25:56,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:25:55" (2/3) ... [2020-10-28 00:25:56,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551bde52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:25:56, skipping insertion in model container [2020-10-28 00:25:56,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:25:56" (3/3) ... [2020-10-28 00:25:56,604 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:25:56,616 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:25:56,621 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:25:56,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:25:56,662 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:25:56,663 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:25:56,663 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:25:56,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:25:56,663 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:25:56,663 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:25:56,664 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:25:56,664 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:25:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 00:25:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:25:56,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:56,697 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] [2020-10-28 00:25:56,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 00:25:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:56,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260677946] [2020-10-28 00:25:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:57,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:58,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:59,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:59,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:25:59,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:25:59,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2801 [2020-10-28 00:25:59,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:25:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:25:59,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:25:59,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:26:00,476 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:00,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:00,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:00,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:00,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:00,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:26:00,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:00,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260677946] [2020-10-28 00:26:00,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:00,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:26:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409315567] [2020-10-28 00:26:00,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:26:00,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:00,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:26:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:00,564 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 6 states. [2020-10-28 00:26:00,957 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:26:02,335 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:02,701 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:03,128 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:03,518 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:03,632 INFO L93 Difference]: Finished difference Result 722 states and 1204 transitions. [2020-10-28 00:26:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:26:03,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:26:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:03,654 INFO L225 Difference]: With dead ends: 722 [2020-10-28 00:26:03,654 INFO L226 Difference]: Without dead ends: 601 [2020-10-28 00:26:03,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:26:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-28 00:26:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 238. [2020-10-28 00:26:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 00:26:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 375 transitions. [2020-10-28 00:26:03,789 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 375 transitions. Word has length 67 [2020-10-28 00:26:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:03,790 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 375 transitions. [2020-10-28 00:26:03,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:26:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 375 transitions. [2020-10-28 00:26:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:26:03,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:03,795 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] [2020-10-28 00:26:03,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:26:03,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1967253613, now seen corresponding path program 1 times [2020-10-28 00:26:03,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:03,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204891798] [2020-10-28 00:26:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:04,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:04,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:07,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:07,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:26:07,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:07,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3303 [2020-10-28 00:26:07,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:26:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:26:07,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 00:26:07,601 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:07,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:07,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:07,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:07,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:07,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:26:07,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:07,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:07,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:07,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:07,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204891798] [2020-10-28 00:26:07,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:07,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:26:07,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614405944] [2020-10-28 00:26:07,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:26:07,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:26:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:26:07,652 INFO L87 Difference]: Start difference. First operand 238 states and 375 transitions. Second operand 7 states. [2020-10-28 00:26:08,074 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:26:09,269 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:09,576 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:09,979 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:10,439 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:26:10,821 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:11,499 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:26:12,221 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:12,233 INFO L93 Difference]: Finished difference Result 1492 states and 2451 transitions. [2020-10-28 00:26:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:26:12,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 00:26:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:12,242 INFO L225 Difference]: With dead ends: 1492 [2020-10-28 00:26:12,242 INFO L226 Difference]: Without dead ends: 1315 [2020-10-28 00:26:12,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:26:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-10-28 00:26:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 695. [2020-10-28 00:26:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 00:26:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1134 transitions. [2020-10-28 00:26:12,326 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1134 transitions. Word has length 68 [2020-10-28 00:26:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:12,327 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1134 transitions. [2020-10-28 00:26:12,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:26:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1134 transitions. [2020-10-28 00:26:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:26:12,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:12,331 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] [2020-10-28 00:26:12,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:26:12,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -913645665, now seen corresponding path program 1 times [2020-10-28 00:26:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:12,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507913562] [2020-10-28 00:26:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:12,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:14,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:14,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:26:14,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2613 [2020-10-28 00:26:14,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:14,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:15,351 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:15,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:15,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:15,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:15,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:15,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:15,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:15,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:15,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:15,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:15,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:15,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507913562] [2020-10-28 00:26:15,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:15,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:15,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978554344] [2020-10-28 00:26:15,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:15,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:15,411 INFO L87 Difference]: Start difference. First operand 695 states and 1134 transitions. Second operand 5 states. [2020-10-28 00:26:15,779 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:16,955 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:17,078 INFO L93 Difference]: Finished difference Result 2439 states and 4034 transitions. [2020-10-28 00:26:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:17,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 00:26:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:17,092 INFO L225 Difference]: With dead ends: 2439 [2020-10-28 00:26:17,092 INFO L226 Difference]: Without dead ends: 1861 [2020-10-28 00:26:17,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:26:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2020-10-28 00:26:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1273. [2020-10-28 00:26:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2020-10-28 00:26:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2092 transitions. [2020-10-28 00:26:17,204 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2092 transitions. Word has length 69 [2020-10-28 00:26:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:17,204 INFO L481 AbstractCegarLoop]: Abstraction has 1273 states and 2092 transitions. [2020-10-28 00:26:17,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2092 transitions. [2020-10-28 00:26:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:26:17,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:17,208 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] [2020-10-28 00:26:17,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:26:17,209 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash 114088646, now seen corresponding path program 1 times [2020-10-28 00:26:17,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:17,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855574399] [2020-10-28 00:26:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:17,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:19,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:26:19,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:19,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-28 00:26:19,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:26:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:20,137 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:20,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:20,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:20,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:20,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:26:20,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:20,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855574399] [2020-10-28 00:26:20,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:20,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959131083] [2020-10-28 00:26:20,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:20,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:20,190 INFO L87 Difference]: Start difference. First operand 1273 states and 2092 transitions. Second operand 5 states. [2020-10-28 00:26:20,587 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:21,803 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:21,992 INFO L93 Difference]: Finished difference Result 4711 states and 7798 transitions. [2020-10-28 00:26:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:21,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:26:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:22,018 INFO L225 Difference]: With dead ends: 4711 [2020-10-28 00:26:22,019 INFO L226 Difference]: Without dead ends: 3565 [2020-10-28 00:26:22,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:26:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2020-10-28 00:26:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2402. [2020-10-28 00:26:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-10-28 00:26:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3956 transitions. [2020-10-28 00:26:22,228 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3956 transitions. Word has length 70 [2020-10-28 00:26:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:22,229 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 3956 transitions. [2020-10-28 00:26:22,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3956 transitions. [2020-10-28 00:26:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:26:22,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:22,231 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] [2020-10-28 00:26:22,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:26:22,232 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2094232715, now seen corresponding path program 1 times [2020-10-28 00:26:22,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:22,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522070944] [2020-10-28 00:26:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:22,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:22,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:25,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:27,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 00:26:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:26:27,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:27,765 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:27,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:27,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:27,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:27,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:27,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:26:27,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:27,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:27,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522070944] [2020-10-28 00:26:27,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:27,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569918017] [2020-10-28 00:26:27,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:27,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:27,847 INFO L87 Difference]: Start difference. First operand 2402 states and 3956 transitions. Second operand 4 states. [2020-10-28 00:26:28,233 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:29,654 INFO L93 Difference]: Finished difference Result 6391 states and 10549 transitions. [2020-10-28 00:26:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:29,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:26:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:29,681 INFO L225 Difference]: With dead ends: 6391 [2020-10-28 00:26:29,682 INFO L226 Difference]: Without dead ends: 4066 [2020-10-28 00:26:29,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2020-10-28 00:26:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 4063. [2020-10-28 00:26:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4063 states. [2020-10-28 00:26:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 6667 transitions. [2020-10-28 00:26:30,014 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 6667 transitions. Word has length 71 [2020-10-28 00:26:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:30,014 INFO L481 AbstractCegarLoop]: Abstraction has 4063 states and 6667 transitions. [2020-10-28 00:26:30,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 6667 transitions. [2020-10-28 00:26:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:26:30,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:30,016 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] [2020-10-28 00:26:30,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:26:30,016 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2094711827, now seen corresponding path program 1 times [2020-10-28 00:26:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:30,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728681990] [2020-10-28 00:26:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:26:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:26:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:35,528 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:35,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:35,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:35,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:35,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:35,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:35,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728681990] [2020-10-28 00:26:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360298345] [2020-10-28 00:26:35,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:35,588 INFO L87 Difference]: Start difference. First operand 4063 states and 6667 transitions. Second operand 4 states. [2020-10-28 00:26:35,986 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:37,367 INFO L93 Difference]: Finished difference Result 10754 states and 17647 transitions. [2020-10-28 00:26:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:37,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:26:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:37,407 INFO L225 Difference]: With dead ends: 10754 [2020-10-28 00:26:37,407 INFO L226 Difference]: Without dead ends: 6784 [2020-10-28 00:26:37,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2020-10-28 00:26:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6781. [2020-10-28 00:26:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6781 states. [2020-10-28 00:26:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 11051 transitions. [2020-10-28 00:26:37,983 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 11051 transitions. Word has length 71 [2020-10-28 00:26:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:37,983 INFO L481 AbstractCegarLoop]: Abstraction has 6781 states and 11051 transitions. [2020-10-28 00:26:37,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 11051 transitions. [2020-10-28 00:26:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:26:37,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:37,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:37,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:26:37,985 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1034528335, now seen corresponding path program 1 times [2020-10-28 00:26:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:37,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441841817] [2020-10-28 00:26:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:43,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:26:43,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:26:43,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:26:43,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:43,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:43,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:26:43,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:26:43,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:43,391 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:43,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:43,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:43,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:43,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:26:43,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:43,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:43,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:43,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:43,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441841817] [2020-10-28 00:26:43,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:43,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:43,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754684791] [2020-10-28 00:26:43,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:43,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:43,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:43,446 INFO L87 Difference]: Start difference. First operand 6781 states and 11051 transitions. Second operand 4 states. [2020-10-28 00:26:43,822 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:45,371 INFO L93 Difference]: Finished difference Result 17731 states and 28831 transitions. [2020-10-28 00:26:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:45,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:26:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:45,434 INFO L225 Difference]: With dead ends: 17731 [2020-10-28 00:26:45,435 INFO L226 Difference]: Without dead ends: 11045 [2020-10-28 00:26:45,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11045 states. [2020-10-28 00:26:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11045 to 11008. [2020-10-28 00:26:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11008 states. [2020-10-28 00:26:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11008 states to 11008 states and 17745 transitions. [2020-10-28 00:26:46,254 INFO L78 Accepts]: Start accepts. Automaton has 11008 states and 17745 transitions. Word has length 71 [2020-10-28 00:26:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:46,255 INFO L481 AbstractCegarLoop]: Abstraction has 11008 states and 17745 transitions. [2020-10-28 00:26:46,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11008 states and 17745 transitions. [2020-10-28 00:26:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:26:46,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:46,256 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] [2020-10-28 00:26:46,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:26:46,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -974900522, now seen corresponding path program 1 times [2020-10-28 00:26:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:46,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749859387] [2020-10-28 00:26:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:47,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:47,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:26:47,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:47,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-28 00:26:47,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:47,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:47,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:26:47,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:26:47,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:47,744 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:47,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:47,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:47,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:47,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:47,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749859387] [2020-10-28 00:26:47,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:47,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:47,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267415708] [2020-10-28 00:26:47,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:47,784 INFO L87 Difference]: Start difference. First operand 11008 states and 17745 transitions. Second operand 4 states. [2020-10-28 00:26:48,679 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:49,523 INFO L93 Difference]: Finished difference Result 26222 states and 42005 transitions. [2020-10-28 00:26:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:49,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 00:26:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:49,567 INFO L225 Difference]: With dead ends: 26222 [2020-10-28 00:26:49,568 INFO L226 Difference]: Without dead ends: 15275 [2020-10-28 00:26:49,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15275 states. [2020-10-28 00:26:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15275 to 15272. [2020-10-28 00:26:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15272 states. [2020-10-28 00:26:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15272 states to 15272 states and 23905 transitions. [2020-10-28 00:26:50,628 INFO L78 Accepts]: Start accepts. Automaton has 15272 states and 23905 transitions. Word has length 72 [2020-10-28 00:26:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:50,629 INFO L481 AbstractCegarLoop]: Abstraction has 15272 states and 23905 transitions. [2020-10-28 00:26:50,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 15272 states and 23905 transitions. [2020-10-28 00:26:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:26:50,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:50,630 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] [2020-10-28 00:26:50,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:26:50,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash 15864717, now seen corresponding path program 1 times [2020-10-28 00:26:50,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:50,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145261818] [2020-10-28 00:26:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:51,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:26:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:51,774 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:51,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:51,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:51,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:51,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145261818] [2020-10-28 00:26:51,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:51,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468018144] [2020-10-28 00:26:51,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:51,816 INFO L87 Difference]: Start difference. First operand 15272 states and 23905 transitions. Second operand 4 states. [2020-10-28 00:26:52,185 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:53,698 INFO L93 Difference]: Finished difference Result 34614 states and 54207 transitions. [2020-10-28 00:26:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:53,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:26:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:53,749 INFO L225 Difference]: With dead ends: 34614 [2020-10-28 00:26:53,750 INFO L226 Difference]: Without dead ends: 19403 [2020-10-28 00:26:53,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19403 states. [2020-10-28 00:26:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19403 to 19400. [2020-10-28 00:26:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19400 states. [2020-10-28 00:26:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19400 states to 19400 states and 30295 transitions. [2020-10-28 00:26:54,762 INFO L78 Accepts]: Start accepts. Automaton has 19400 states and 30295 transitions. Word has length 73 [2020-10-28 00:26:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:54,762 INFO L481 AbstractCegarLoop]: Abstraction has 19400 states and 30295 transitions. [2020-10-28 00:26:54,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19400 states and 30295 transitions. [2020-10-28 00:26:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:26:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:54,764 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] [2020-10-28 00:26:54,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:26:54,764 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1107276276, now seen corresponding path program 1 times [2020-10-28 00:26:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:54,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568952078] [2020-10-28 00:26:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:56,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:26:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:26:56,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:57,247 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:57,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:57,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:57,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:57,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568952078] [2020-10-28 00:26:57,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:57,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:57,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897216127] [2020-10-28 00:26:57,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:57,291 INFO L87 Difference]: Start difference. First operand 19400 states and 30295 transitions. Second operand 4 states. [2020-10-28 00:26:57,723 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:59,630 INFO L93 Difference]: Finished difference Result 43857 states and 68520 transitions. [2020-10-28 00:26:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:59,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 00:26:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:59,690 INFO L225 Difference]: With dead ends: 43857 [2020-10-28 00:26:59,691 INFO L226 Difference]: Without dead ends: 24565 [2020-10-28 00:26:59,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24565 states. [2020-10-28 00:27:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24565 to 24562. [2020-10-28 00:27:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24562 states. [2020-10-28 00:27:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24562 states to 24562 states and 38269 transitions. [2020-10-28 00:27:01,150 INFO L78 Accepts]: Start accepts. Automaton has 24562 states and 38269 transitions. Word has length 75 [2020-10-28 00:27:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:01,150 INFO L481 AbstractCegarLoop]: Abstraction has 24562 states and 38269 transitions. [2020-10-28 00:27:01,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 24562 states and 38269 transitions. [2020-10-28 00:27:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:27:01,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:01,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:01,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:27:01,152 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 21846219, now seen corresponding path program 1 times [2020-10-28 00:27:01,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:01,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614276763] [2020-10-28 00:27:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:05,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:27:05,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4736 [2020-10-28 00:27:05,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:27:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:27:05,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:06,282 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:06,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:06,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:06,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:06,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:06,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614276763] [2020-10-28 00:27:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:06,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588054512] [2020-10-28 00:27:06,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:06,326 INFO L87 Difference]: Start difference. First operand 24562 states and 38269 transitions. Second operand 4 states. [2020-10-28 00:27:06,679 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:08,682 INFO L93 Difference]: Finished difference Result 52944 states and 82707 transitions. [2020-10-28 00:27:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:08,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 00:27:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:08,764 INFO L225 Difference]: With dead ends: 52944 [2020-10-28 00:27:08,764 INFO L226 Difference]: Without dead ends: 28477 [2020-10-28 00:27:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28477 states. [2020-10-28 00:27:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28477 to 28474. [2020-10-28 00:27:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28474 states. [2020-10-28 00:27:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28474 states to 28474 states and 44296 transitions. [2020-10-28 00:27:10,438 INFO L78 Accepts]: Start accepts. Automaton has 28474 states and 44296 transitions. Word has length 77 [2020-10-28 00:27:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:10,438 INFO L481 AbstractCegarLoop]: Abstraction has 28474 states and 44296 transitions. [2020-10-28 00:27:10,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 28474 states and 44296 transitions. [2020-10-28 00:27:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 00:27:10,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:10,439 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] [2020-10-28 00:27:10,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:27:10,439 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash 730232441, now seen corresponding path program 1 times [2020-10-28 00:27:10,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:10,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522027690] [2020-10-28 00:27:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:10,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:10,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:10,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:12,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:27:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:27:15,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:27:15,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:15,935 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:15,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:15,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:15,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522027690] [2020-10-28 00:27:15,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:15,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:27:15,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640075949] [2020-10-28 00:27:15,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:27:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:27:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:15,976 INFO L87 Difference]: Start difference. First operand 28474 states and 44296 transitions. Second operand 6 states. [2020-10-28 00:27:16,436 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:27:17,620 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:18,013 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:18,599 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:18,983 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:21,097 INFO L93 Difference]: Finished difference Result 81628 states and 127139 transitions. [2020-10-28 00:27:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:27:21,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 00:27:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:21,214 INFO L225 Difference]: With dead ends: 81628 [2020-10-28 00:27:21,214 INFO L226 Difference]: Without dead ends: 53249 [2020-10-28 00:27:21,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:27:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53249 states. [2020-10-28 00:27:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53249 to 28474. [2020-10-28 00:27:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28474 states. [2020-10-28 00:27:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28474 states to 28474 states and 44155 transitions. [2020-10-28 00:27:23,788 INFO L78 Accepts]: Start accepts. Automaton has 28474 states and 44155 transitions. Word has length 78 [2020-10-28 00:27:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:23,788 INFO L481 AbstractCegarLoop]: Abstraction has 28474 states and 44155 transitions. [2020-10-28 00:27:23,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:27:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 28474 states and 44155 transitions. [2020-10-28 00:27:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:27:23,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:23,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:23,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:27:23,790 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:23,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 897598347, now seen corresponding path program 1 times [2020-10-28 00:27:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:23,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594020547] [2020-10-28 00:27:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:28,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:27:28,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:28,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:27:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:27:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 00:27:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:27:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:29,242 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:29,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:29,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:29,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594020547] [2020-10-28 00:27:29,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:29,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:27:29,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474322394] [2020-10-28 00:27:29,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:27:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:27:29,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:29,281 INFO L87 Difference]: Start difference. First operand 28474 states and 44155 transitions. Second operand 6 states. [2020-10-28 00:27:29,740 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:27:30,940 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:31,354 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:31,986 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:32,463 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:37,419 INFO L93 Difference]: Finished difference Result 127242 states and 197789 transitions. [2020-10-28 00:27:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:27:37,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:27:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:37,590 INFO L225 Difference]: With dead ends: 127242 [2020-10-28 00:27:37,590 INFO L226 Difference]: Without dead ends: 98863 [2020-10-28 00:27:37,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:27:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98863 states. [2020-10-28 00:27:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98863 to 53101. [2020-10-28 00:27:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53101 states. [2020-10-28 00:27:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53101 states to 53101 states and 82046 transitions. [2020-10-28 00:27:41,763 INFO L78 Accepts]: Start accepts. Automaton has 53101 states and 82046 transitions. Word has length 81 [2020-10-28 00:27:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 53101 states and 82046 transitions. [2020-10-28 00:27:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:27:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 53101 states and 82046 transitions. [2020-10-28 00:27:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:27:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:41,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:41,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:27:41,764 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1996216828, now seen corresponding path program 1 times [2020-10-28 00:27:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:41,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512929071] [2020-10-28 00:27:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:27:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,206 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:47,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:47,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:47,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:47,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512929071] [2020-10-28 00:27:47,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77188068] [2020-10-28 00:27:47,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:47,244 INFO L87 Difference]: Start difference. First operand 53101 states and 82046 transitions. Second operand 5 states. [2020-10-28 00:27:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:52,800 INFO L93 Difference]: Finished difference Result 75229 states and 115168 transitions. [2020-10-28 00:27:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:27:52,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:27:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:52,912 INFO L225 Difference]: With dead ends: 75229 [2020-10-28 00:27:52,912 INFO L226 Difference]: Without dead ends: 75226 [2020-10-28 00:27:52,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75226 states. [2020-10-28 00:27:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75226 to 53593. [2020-10-28 00:27:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53593 states. [2020-10-28 00:27:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53593 states to 53593 states and 82493 transitions. [2020-10-28 00:27:57,109 INFO L78 Accepts]: Start accepts. Automaton has 53593 states and 82493 transitions. Word has length 82 [2020-10-28 00:27:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 53593 states and 82493 transitions. [2020-10-28 00:27:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53593 states and 82493 transitions. [2020-10-28 00:27:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:27:57,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:57,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1] [2020-10-28 00:27:57,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:27:57,112 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2020775779, now seen corresponding path program 1 times [2020-10-28 00:27:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:57,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75420805] [2020-10-28 00:27:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:57,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:28:02,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:02,527 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:02,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:02,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:02,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75420805] [2020-10-28 00:28:02,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:02,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:02,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317924754] [2020-10-28 00:28:02,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:02,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:02,583 INFO L87 Difference]: Start difference. First operand 53593 states and 82493 transitions. Second operand 4 states. [2020-10-28 00:28:04,296 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:06,597 INFO L93 Difference]: Finished difference Result 96360 states and 148465 transitions. [2020-10-28 00:28:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:06,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:28:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:06,658 INFO L225 Difference]: With dead ends: 96360 [2020-10-28 00:28:06,658 INFO L226 Difference]: Without dead ends: 42862 [2020-10-28 00:28:06,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42862 states. [2020-10-28 00:28:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42862 to 42798. [2020-10-28 00:28:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42798 states. [2020-10-28 00:28:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42798 states to 42798 states and 65562 transitions. [2020-10-28 00:28:09,887 INFO L78 Accepts]: Start accepts. Automaton has 42798 states and 65562 transitions. Word has length 106 [2020-10-28 00:28:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:09,888 INFO L481 AbstractCegarLoop]: Abstraction has 42798 states and 65562 transitions. [2020-10-28 00:28:09,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 42798 states and 65562 transitions. [2020-10-28 00:28:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:28:09,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:09,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1] [2020-10-28 00:28:09,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:28:09,891 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1288871803, now seen corresponding path program 1 times [2020-10-28 00:28:09,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:09,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523426751] [2020-10-28 00:28:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:09,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:10,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:10,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:10,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:14,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:14,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:28:14,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:14,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:28:14,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:14,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:14,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 00:28:14,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:28:14,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:15,380 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:15,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:15,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:15,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523426751] [2020-10-28 00:28:15,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:15,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:15,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199344366] [2020-10-28 00:28:15,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:15,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:15,420 INFO L87 Difference]: Start difference. First operand 42798 states and 65562 transitions. Second operand 4 states. [2020-10-28 00:28:16,931 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:18,106 INFO L93 Difference]: Finished difference Result 61400 states and 94130 transitions. [2020-10-28 00:28:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:18,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:28:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:18,131 INFO L225 Difference]: With dead ends: 61400 [2020-10-28 00:28:18,131 INFO L226 Difference]: Without dead ends: 18697 [2020-10-28 00:28:18,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18697 states. [2020-10-28 00:28:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18697 to 18182. [2020-10-28 00:28:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18182 states. [2020-10-28 00:28:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18182 states to 18182 states and 27798 transitions. [2020-10-28 00:28:19,826 INFO L78 Accepts]: Start accepts. Automaton has 18182 states and 27798 transitions. Word has length 106 [2020-10-28 00:28:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:19,826 INFO L481 AbstractCegarLoop]: Abstraction has 18182 states and 27798 transitions. [2020-10-28 00:28:19,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18182 states and 27798 transitions. [2020-10-28 00:28:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:28:19,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:19,828 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] [2020-10-28 00:28:19,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:28:19,829 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 680341659, now seen corresponding path program 1 times [2020-10-28 00:28:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:19,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118401738] [2020-10-28 00:28:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:19,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:19,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:21,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:24,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:24,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:28:24,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:28:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:28:24,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:28:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:28:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:28:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:25,252 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:25,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:25,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:25,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:25,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:25,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:28:25,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:25,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:25,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:25,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:25,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:25,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118401738] [2020-10-28 00:28:25,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:28:25,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:28:25,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813727003] [2020-10-28 00:28:25,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:28:25,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:25,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:28:25,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:25,302 INFO L87 Difference]: Start difference. First operand 18182 states and 27798 transitions. Second operand 6 states. [2020-10-28 00:28:25,759 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:28:26,966 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:28:27,387 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:28:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:29,472 INFO L93 Difference]: Finished difference Result 47419 states and 72794 transitions. [2020-10-28 00:28:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:28:29,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-28 00:28:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:29,511 INFO L225 Difference]: With dead ends: 47419 [2020-10-28 00:28:29,511 INFO L226 Difference]: Without dead ends: 29357 [2020-10-28 00:28:29,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:28:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29357 states. [2020-10-28 00:28:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29357 to 29351. [2020-10-28 00:28:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29351 states. [2020-10-28 00:28:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29351 states to 29351 states and 44824 transitions. [2020-10-28 00:28:31,736 INFO L78 Accepts]: Start accepts. Automaton has 29351 states and 44824 transitions. Word has length 107 [2020-10-28 00:28:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:31,737 INFO L481 AbstractCegarLoop]: Abstraction has 29351 states and 44824 transitions. [2020-10-28 00:28:31,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29351 states and 44824 transitions. [2020-10-28 00:28:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:28:31,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:31,739 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] [2020-10-28 00:28:31,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:28:31,740 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1183414255, now seen corresponding path program 1 times [2020-10-28 00:28:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:31,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177795945] [2020-10-28 00:28:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:31,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:31,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:32,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:33,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:36,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:36,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:28:36,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:28:36,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:36,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:36,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:28:36,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:28:36,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:37,153 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:37,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:37,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:37,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:28:37,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:37,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:37,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:37,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:37,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177795945] [2020-10-28 00:28:37,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:37,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221036092] [2020-10-28 00:28:37,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:37,201 INFO L87 Difference]: Start difference. First operand 29351 states and 44824 transitions. Second operand 4 states. [2020-10-28 00:28:38,666 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:39,310 INFO L93 Difference]: Finished difference Result 41257 states and 63011 transitions. [2020-10-28 00:28:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:39,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:28:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:39,329 INFO L225 Difference]: With dead ends: 41257 [2020-10-28 00:28:39,329 INFO L226 Difference]: Without dead ends: 12026 [2020-10-28 00:28:39,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2020-10-28 00:28:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 11955. [2020-10-28 00:28:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11955 states. [2020-10-28 00:28:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11955 states to 11955 states and 18156 transitions. [2020-10-28 00:28:40,374 INFO L78 Accepts]: Start accepts. Automaton has 11955 states and 18156 transitions. Word has length 107 [2020-10-28 00:28:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:40,374 INFO L481 AbstractCegarLoop]: Abstraction has 11955 states and 18156 transitions. [2020-10-28 00:28:40,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 11955 states and 18156 transitions. [2020-10-28 00:28:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:28:40,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:40,376 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:40,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:28:40,376 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1103017589, now seen corresponding path program 1 times [2020-10-28 00:28:40,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:40,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384540949] [2020-10-28 00:28:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:45,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:45,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 00:28:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:45,795 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:45,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:45,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:45,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:45,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 00:28:45,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384540949] [2020-10-28 00:28:45,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:28:45,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:28:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989646499] [2020-10-28 00:28:45,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:28:45,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:45,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:28:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:45,829 INFO L87 Difference]: Start difference. First operand 11955 states and 18156 transitions. Second operand 6 states. [2020-10-28 00:28:46,242 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:28:47,434 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:28:47,838 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:28:48,208 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:49,779 INFO L93 Difference]: Finished difference Result 27918 states and 42405 transitions. [2020-10-28 00:28:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:28:49,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-28 00:28:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:49,804 INFO L225 Difference]: With dead ends: 27918 [2020-10-28 00:28:49,804 INFO L226 Difference]: Without dead ends: 21853 [2020-10-28 00:28:49,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:28:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21853 states. [2020-10-28 00:28:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21853 to 17641. [2020-10-28 00:28:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17641 states. [2020-10-28 00:28:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17641 states to 17641 states and 26748 transitions. [2020-10-28 00:28:51,263 INFO L78 Accepts]: Start accepts. Automaton has 17641 states and 26748 transitions. Word has length 108 [2020-10-28 00:28:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:51,263 INFO L481 AbstractCegarLoop]: Abstraction has 17641 states and 26748 transitions. [2020-10-28 00:28:51,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 17641 states and 26748 transitions. [2020-10-28 00:28:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:28:51,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:51,265 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:51,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:28:51,266 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1060091061, now seen corresponding path program 1 times [2020-10-28 00:28:51,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:51,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116743409] [2020-10-28 00:28:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:51,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:52,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:53,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:53,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:56,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 00:28:56,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:56,684 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:56,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:56,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:56,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:56,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:28:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116743409] [2020-10-28 00:28:56,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:28:56,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:28:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108001117] [2020-10-28 00:28:56,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:28:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:28:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:56,721 INFO L87 Difference]: Start difference. First operand 17641 states and 26748 transitions. Second operand 6 states. [2020-10-28 00:28:57,139 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:28:58,260 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:28:58,624 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:59,016 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:29:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:01,566 INFO L93 Difference]: Finished difference Result 40876 states and 62040 transitions. [2020-10-28 00:29:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:29:01,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-28 00:29:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:01,610 INFO L225 Difference]: With dead ends: 40876 [2020-10-28 00:29:01,610 INFO L226 Difference]: Without dead ends: 29041 [2020-10-28 00:29:01,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:29:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29041 states. [2020-10-28 00:29:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29041 to 25704. [2020-10-28 00:29:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25704 states. [2020-10-28 00:29:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25704 states to 25704 states and 38950 transitions. [2020-10-28 00:29:03,784 INFO L78 Accepts]: Start accepts. Automaton has 25704 states and 38950 transitions. Word has length 108 [2020-10-28 00:29:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:03,785 INFO L481 AbstractCegarLoop]: Abstraction has 25704 states and 38950 transitions. [2020-10-28 00:29:03,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:29:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25704 states and 38950 transitions. [2020-10-28 00:29:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:29:03,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:03,787 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:29:03,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:29:03,787 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash 787398917, now seen corresponding path program 1 times [2020-10-28 00:29:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:03,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117327328] [2020-10-28 00:29:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:08,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:08,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:29:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:29:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:29:08,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:29:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 00:29:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:09,280 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:09,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:09,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:29:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 00:29:09,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117327328] [2020-10-28 00:29:09,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:09,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:09,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757348204] [2020-10-28 00:29:09,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:09,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:09,325 INFO L87 Difference]: Start difference. First operand 25704 states and 38950 transitions. Second operand 5 states. [2020-10-28 00:29:09,707 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:29:10,788 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:29:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:13,550 INFO L93 Difference]: Finished difference Result 60362 states and 90789 transitions. [2020-10-28 00:29:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:29:13,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 00:29:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:13,595 INFO L225 Difference]: With dead ends: 60362 [2020-10-28 00:29:13,596 INFO L226 Difference]: Without dead ends: 34778 [2020-10-28 00:29:13,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:29:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2020-10-28 00:29:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 27459. [2020-10-28 00:29:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27459 states. [2020-10-28 00:29:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27459 states to 27459 states and 41505 transitions. [2020-10-28 00:29:16,081 INFO L78 Accepts]: Start accepts. Automaton has 27459 states and 41505 transitions. Word has length 109 [2020-10-28 00:29:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:16,081 INFO L481 AbstractCegarLoop]: Abstraction has 27459 states and 41505 transitions. [2020-10-28 00:29:16,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:29:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27459 states and 41505 transitions. [2020-10-28 00:29:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:29:16,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:16,083 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:29:16,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:29:16,083 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1590854287, now seen corresponding path program 1 times [2020-10-28 00:29:16,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:16,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231745703] [2020-10-28 00:29:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:16,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:16,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 00:29:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,696 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 00:29:21,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231745703] [2020-10-28 00:29:21,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217363286] [2020-10-28 00:29:21,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:21,775 INFO L87 Difference]: Start difference. First operand 27459 states and 41505 transitions. Second operand 5 states. [2020-10-28 00:29:22,190 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:29:23,228 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:29:23,885 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:29:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:27,661 INFO L93 Difference]: Finished difference Result 58543 states and 88592 transitions. [2020-10-28 00:29:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:29:27,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 00:29:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:27,714 INFO L225 Difference]: With dead ends: 58543 [2020-10-28 00:29:27,714 INFO L226 Difference]: Without dead ends: 42859 [2020-10-28 00:29:27,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:29:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42859 states.