/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.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:40:09,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:40:09,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:40:09,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:40:09,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:40:09,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:40:09,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:40:09,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:40:09,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:40:09,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:40:09,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:40:09,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:40:09,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:40:09,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:40:09,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:40:09,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:40:09,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:40:09,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:40:09,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:40:09,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:40:09,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:40:09,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:40:09,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:40:09,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:40:09,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:40:09,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:40:09,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:40:09,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:40:09,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:40:09,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:40:09,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:40:09,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:40:09,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:40:09,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:40:09,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:40:09,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:40:09,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:40:09,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:40:09,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:40:09,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:40:09,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:40:09,372 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 00:40:09,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:40:09,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:40:09,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:40:09,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:40:09,433 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:40:09,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:40:09,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:40:09,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:40:09,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:40:09,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:40:09,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:40:09,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:40:09,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:40:09,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:40:09,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:40:09,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:40:09,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:40:09,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:40:09,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:40:09,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:40:09,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:40:09,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:40:09,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:40:09,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:40:09,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:40:09,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:40:09,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:40:09,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:40:09,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:40:09,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:40:09,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:40:09,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:40:09,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:40:09,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:40:09,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:40:09,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:40:10,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8548b52/8be59a4b1d9d437c879c326905de8ec6/FLAG518736c11 [2020-10-28 00:40:10,969 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:40:10,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:40:10,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8548b52/8be59a4b1d9d437c879c326905de8ec6/FLAG518736c11 [2020-10-28 00:40:11,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8548b52/8be59a4b1d9d437c879c326905de8ec6 [2020-10-28 00:40:11,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:40:11,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:40:11,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:11,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:40:11,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:40:11,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:11" (1/1) ... [2020-10-28 00:40:11,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f83aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:11, skipping insertion in model container [2020-10-28 00:40:11,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:11" (1/1) ... [2020-10-28 00:40:11,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:40:11,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:40:11,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:40:12,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:40:12,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:40:12,490 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:40:12,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12 WrapperNode [2020-10-28 00:40:12,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:12,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:40:12,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:40:12,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:40:12,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (1/1) ... [2020-10-28 00:40:12,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:40:12,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:40:12,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:40:12,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:40:12,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (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 00:40:12,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:40:12,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:40:12,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:40:12,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:40:12,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:40:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:40:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:40:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:40:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:40:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:40:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:40:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:40:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:40:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:40:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:40:12,806 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:40:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:40:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:40:12,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:40:15,695 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:40:15,698 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:40:15,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:15 BoogieIcfgContainer [2020-10-28 00:40:15,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:40:15,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:40:15,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:40:15,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:40:15,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:40:11" (1/3) ... [2020-10-28 00:40:15,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dbbc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:15, skipping insertion in model container [2020-10-28 00:40:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:12" (2/3) ... [2020-10-28 00:40:15,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dbbc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:15, skipping insertion in model container [2020-10-28 00:40:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:15" (3/3) ... [2020-10-28 00:40:15,715 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:40:15,728 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:40:15,735 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:40:15,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:40:15,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:40:15,802 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:40:15,802 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:40:15,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:40:15,803 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:40:15,803 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:40:15,803 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:40:15,803 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:40:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-10-28 00:40:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 00:40:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:15,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:15,872 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 596635033, now seen corresponding path program 1 times [2020-10-28 00:40:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:15,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595455229] [2020-10-28 00:40:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:16,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:21,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:21,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 00:40:21,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:40:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-28 00:40:21,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:40:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-10-28 00:40:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:40:21,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:40:23,417 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:40:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:23,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:23,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:23,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:23,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:23,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 00:40:23,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595455229] [2020-10-28 00:40:23,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:23,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:40:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087658110] [2020-10-28 00:40:23,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:40:23,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:23,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:40:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:40:23,645 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 8 states. [2020-10-28 00:40:24,997 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 419 [2020-10-28 00:40:33,731 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:40:34,947 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:40:36,173 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 00:40:37,364 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:40:38,794 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:40:40,004 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 00:40:41,207 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:40:42,382 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 00:40:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:42,624 INFO L93 Difference]: Finished difference Result 3113 states and 5362 transitions. [2020-10-28 00:40:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:40:42,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2020-10-28 00:40:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:42,702 INFO L225 Difference]: With dead ends: 3113 [2020-10-28 00:40:42,704 INFO L226 Difference]: Without dead ends: 2852 [2020-10-28 00:40:42,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 00:40:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-10-28 00:40:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1009. [2020-10-28 00:40:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2020-10-28 00:40:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1746 transitions. [2020-10-28 00:40:42,936 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1746 transitions. Word has length 218 [2020-10-28 00:40:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:42,941 INFO L481 AbstractCegarLoop]: Abstraction has 1009 states and 1746 transitions. [2020-10-28 00:40:42,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:40:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1746 transitions. [2020-10-28 00:40:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 00:40:42,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:42,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:42,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:40:42,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash -879361082, now seen corresponding path program 1 times [2020-10-28 00:40:42,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:42,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378380508] [2020-10-28 00:40:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:43,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:44,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:45,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:46,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:48,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:40:48,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-28 00:40:48,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:40:48,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:49,495 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:40:49,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:49,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:49,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:49,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378380508] [2020-10-28 00:40:49,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:49,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:40:49,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557709212] [2020-10-28 00:40:49,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:40:49,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:40:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:40:49,687 INFO L87 Difference]: Start difference. First operand 1009 states and 1746 transitions. Second operand 9 states. [2020-10-28 00:40:51,045 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 00:40:58,961 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:41:00,199 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:41:01,418 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 00:41:02,642 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:41:03,870 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 00:41:05,174 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 416 [2020-10-28 00:41:06,373 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 00:41:07,621 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-28 00:41:08,859 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-28 00:41:10,915 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 00:41:12,152 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-28 00:41:13,423 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 416 [2020-10-28 00:41:15,702 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:41:16,934 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 00:41:18,094 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:41:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:18,134 INFO L93 Difference]: Finished difference Result 7477 states and 12655 transitions. [2020-10-28 00:41:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 00:41:18,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 219 [2020-10-28 00:41:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:18,174 INFO L225 Difference]: With dead ends: 7477 [2020-10-28 00:41:18,174 INFO L226 Difference]: Without dead ends: 7020 [2020-10-28 00:41:18,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 00:41:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2020-10-28 00:41:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 2286. [2020-10-28 00:41:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2020-10-28 00:41:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3903 transitions. [2020-10-28 00:41:18,377 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3903 transitions. Word has length 219 [2020-10-28 00:41:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:18,378 INFO L481 AbstractCegarLoop]: Abstraction has 2286 states and 3903 transitions. [2020-10-28 00:41:18,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:41:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3903 transitions. [2020-10-28 00:41:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 00:41:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:18,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:41:18,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 750698322, now seen corresponding path program 1 times [2020-10-28 00:41:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:18,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76554114] [2020-10-28 00:41:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:18,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:19,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:23,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:23,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-28 00:41:23,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:41:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 00:41:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:41:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-28 00:41:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:41:23,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:24,844 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:41:24,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:24,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:24,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:24,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:24,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:41:24,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:24,978 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 00:41:24,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76554114] [2020-10-28 00:41:24,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:24,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:41:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343960635] [2020-10-28 00:41:24,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:41:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:41:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:24,982 INFO L87 Difference]: Start difference. First operand 2286 states and 3903 transitions. Second operand 5 states. [2020-10-28 00:41:26,374 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:41:33,204 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:41:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:33,490 INFO L93 Difference]: Finished difference Result 7042 states and 11939 transitions. [2020-10-28 00:41:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:41:33,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-28 00:41:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:33,518 INFO L225 Difference]: With dead ends: 7042 [2020-10-28 00:41:33,519 INFO L226 Difference]: Without dead ends: 5490 [2020-10-28 00:41:33,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:41:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2020-10-28 00:41:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 3928. [2020-10-28 00:41:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-10-28 00:41:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6675 transitions. [2020-10-28 00:41:33,868 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6675 transitions. Word has length 220 [2020-10-28 00:41:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:33,868 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 6675 transitions. [2020-10-28 00:41:33,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:41:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6675 transitions. [2020-10-28 00:41:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 00:41:33,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:33,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:41:33,875 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -115768993, now seen corresponding path program 1 times [2020-10-28 00:41:33,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:33,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31974274] [2020-10-28 00:41:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:38,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:38,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-28 00:41:38,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:41:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 00:41:38,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:41:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-10-28 00:41:38,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:41:38,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:41:40,192 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:41:40,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:40,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:40,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:40,394 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 00:41:40,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31974274] [2020-10-28 00:41:40,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:40,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:41:40,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563538798] [2020-10-28 00:41:40,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:41:40,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:41:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:40,397 INFO L87 Difference]: Start difference. First operand 3928 states and 6675 transitions. Second operand 5 states. [2020-10-28 00:41:41,751 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:41:48,643 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:41:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:49,020 INFO L93 Difference]: Finished difference Result 13326 states and 22545 transitions. [2020-10-28 00:41:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:41:49,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-10-28 00:41:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:49,066 INFO L225 Difference]: With dead ends: 13326 [2020-10-28 00:41:49,066 INFO L226 Difference]: Without dead ends: 10232 [2020-10-28 00:41:49,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:41:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-10-28 00:41:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 7121. [2020-10-28 00:41:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2020-10-28 00:41:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 12059 transitions. [2020-10-28 00:41:49,668 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 12059 transitions. Word has length 221 [2020-10-28 00:41:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:49,669 INFO L481 AbstractCegarLoop]: Abstraction has 7121 states and 12059 transitions. [2020-10-28 00:41:49,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:41:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 12059 transitions. [2020-10-28 00:41:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 00:41:49,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:49,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:49,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:41:49,676 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1065153269, now seen corresponding path program 1 times [2020-10-28 00:41:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:49,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992318789] [2020-10-28 00:41:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:49,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:49,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:50,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:51,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:51,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:54,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:54,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 00:41:54,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:41:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-28 00:41:54,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:41:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-28 00:41:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:41:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:56,151 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:41:56,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:56,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:56,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:56,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:41:56,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:56,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:56,279 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 00:41:56,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992318789] [2020-10-28 00:41:56,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:56,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:41:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994190010] [2020-10-28 00:41:56,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:41:56,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:41:56,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:56,282 INFO L87 Difference]: Start difference. First operand 7121 states and 12059 transitions. Second operand 5 states. [2020-10-28 00:41:57,533 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:42:04,367 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:42:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:05,317 INFO L93 Difference]: Finished difference Result 25698 states and 43401 transitions. [2020-10-28 00:42:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:42:05,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-28 00:42:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:05,365 INFO L225 Difference]: With dead ends: 25698 [2020-10-28 00:42:05,365 INFO L226 Difference]: Without dead ends: 19527 [2020-10-28 00:42:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:42:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2020-10-28 00:42:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 13325. [2020-10-28 00:42:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13325 states. [2020-10-28 00:42:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13325 states to 13325 states and 22507 transitions. [2020-10-28 00:42:06,451 INFO L78 Accepts]: Start accepts. Automaton has 13325 states and 22507 transitions. Word has length 222 [2020-10-28 00:42:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:06,451 INFO L481 AbstractCegarLoop]: Abstraction has 13325 states and 22507 transitions. [2020-10-28 00:42:06,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:42:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 13325 states and 22507 transitions. [2020-10-28 00:42:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 00:42:06,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:06,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:06,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:42:06,458 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash -289996040, now seen corresponding path program 1 times [2020-10-28 00:42:06,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:06,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486321650] [2020-10-28 00:42:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:06,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:07,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:07,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:08,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:11,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 00:42:11,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:42:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:42:11,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:42:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-28 00:42:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:42:11,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:12,778 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:42:12,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:12,888 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 00:42:12,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486321650] [2020-10-28 00:42:12,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:12,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:42:12,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38547861] [2020-10-28 00:42:12,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:42:12,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:42:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:12,891 INFO L87 Difference]: Start difference. First operand 13325 states and 22507 transitions. Second operand 5 states. [2020-10-28 00:42:14,073 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:42:20,951 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 411 [2020-10-28 00:42:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:22,710 INFO L93 Difference]: Finished difference Result 50258 states and 84745 transitions. [2020-10-28 00:42:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:42:22,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-28 00:42:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:22,809 INFO L225 Difference]: With dead ends: 50258 [2020-10-28 00:42:22,809 INFO L226 Difference]: Without dead ends: 37947 [2020-10-28 00:42:22,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:42:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37947 states. [2020-10-28 00:42:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37947 to 25577. [2020-10-28 00:42:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25577 states. [2020-10-28 00:42:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25577 states to 25577 states and 43107 transitions. [2020-10-28 00:42:25,010 INFO L78 Accepts]: Start accepts. Automaton has 25577 states and 43107 transitions. Word has length 223 [2020-10-28 00:42:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:25,011 INFO L481 AbstractCegarLoop]: Abstraction has 25577 states and 43107 transitions. [2020-10-28 00:42:25,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:42:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25577 states and 43107 transitions. [2020-10-28 00:42:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 00:42:25,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:25,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:42:25,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:42:25,019 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1467619912, now seen corresponding path program 1 times [2020-10-28 00:42:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:25,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256823475] [2020-10-28 00:42:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:25,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:26,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:26,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:30,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:30,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 00:42:30,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:42:30,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:42:30,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-10-28 00:42:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:42:30,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:31,452 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:42:31,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:31,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:31,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:31,590 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 00:42:31,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256823475] [2020-10-28 00:42:31,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:31,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:31,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639138767] [2020-10-28 00:42:31,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:31,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:31,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:31,592 INFO L87 Difference]: Start difference. First operand 25577 states and 43107 transitions. Second operand 4 states. [2020-10-28 00:42:38,586 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:42:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:41,213 INFO L93 Difference]: Finished difference Result 70678 states and 118777 transitions. [2020-10-28 00:42:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:41,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-10-28 00:42:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:41,312 INFO L225 Difference]: With dead ends: 70678 [2020-10-28 00:42:41,312 INFO L226 Difference]: Without dead ends: 46115 [2020-10-28 00:42:41,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46115 states. [2020-10-28 00:42:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46115 to 45887. [2020-10-28 00:42:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45887 states. [2020-10-28 00:42:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45887 states to 45887 states and 76788 transitions. [2020-10-28 00:42:44,702 INFO L78 Accepts]: Start accepts. Automaton has 45887 states and 76788 transitions. Word has length 225 [2020-10-28 00:42:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:44,702 INFO L481 AbstractCegarLoop]: Abstraction has 45887 states and 76788 transitions. [2020-10-28 00:42:44,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 45887 states and 76788 transitions. [2020-10-28 00:42:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 00:42:44,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:44,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:44,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:42:44,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash -265475189, now seen corresponding path program 1 times [2020-10-28 00:42:44,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:44,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596118295] [2020-10-28 00:42:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:49,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:49,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 00:42:49,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:42:49,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 00:42:49,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-28 00:42:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:42:49,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:51,038 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:42:51,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:51,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:51,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:51,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:51,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:51,136 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 00:42:51,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596118295] [2020-10-28 00:42:51,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:51,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:51,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346026388] [2020-10-28 00:42:51,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:51,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:51,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:51,138 INFO L87 Difference]: Start difference. First operand 45887 states and 76788 transitions. Second operand 4 states. [2020-10-28 00:42:52,330 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-28 00:43:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:03,572 INFO L93 Difference]: Finished difference Result 126233 states and 210896 transitions. [2020-10-28 00:43:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:03,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-10-28 00:43:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:03,835 INFO L225 Difference]: With dead ends: 126233 [2020-10-28 00:43:03,835 INFO L226 Difference]: Without dead ends: 81138 [2020-10-28 00:43:03,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81138 states. [2020-10-28 00:43:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81138 to 81135. [2020-10-28 00:43:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81135 states. [2020-10-28 00:43:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81135 states to 81135 states and 135248 transitions. [2020-10-28 00:43:09,603 INFO L78 Accepts]: Start accepts. Automaton has 81135 states and 135248 transitions. Word has length 226 [2020-10-28 00:43:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:09,604 INFO L481 AbstractCegarLoop]: Abstraction has 81135 states and 135248 transitions. [2020-10-28 00:43:09,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 81135 states and 135248 transitions. [2020-10-28 00:43:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 00:43:09,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:09,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:43:09,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:43:09,611 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1482275556, now seen corresponding path program 1 times [2020-10-28 00:43:09,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:09,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144317202] [2020-10-28 00:43:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:12,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:14,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:14,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 00:43:14,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:43:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 00:43:14,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:43:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 00:43:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 00:43:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:16,020 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-28 00:43:16,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:16,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:16,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:16,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:16,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144317202] [2020-10-28 00:43:16,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:16,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:43:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505491778] [2020-10-28 00:43:16,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:43:16,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:43:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:16,107 INFO L87 Difference]: Start difference. First operand 81135 states and 135248 transitions. Second operand 5 states. [2020-10-28 00:43:23,342 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-28 00:43:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:34,381 INFO L93 Difference]: Finished difference Result 230885 states and 384396 transitions. [2020-10-28 00:43:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:43:34,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2020-10-28 00:43:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:34,764 INFO L225 Difference]: With dead ends: 230885 [2020-10-28 00:43:34,764 INFO L226 Difference]: Without dead ends: 150766 [2020-10-28 00:43:34,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:43:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150766 states. [2020-10-28 00:43:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150766 to 149867. [2020-10-28 00:43:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149867 states. [2020-10-28 00:43:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149867 states to 149867 states and 248652 transitions. [2020-10-28 00:43:46,155 INFO L78 Accepts]: Start accepts. Automaton has 149867 states and 248652 transitions. Word has length 226 [2020-10-28 00:43:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:46,155 INFO L481 AbstractCegarLoop]: Abstraction has 149867 states and 248652 transitions. [2020-10-28 00:43:46,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:43:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 149867 states and 248652 transitions. [2020-10-28 00:43:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 00:43:46,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:46,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:43:46,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:43:46,162 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash 429134395, now seen corresponding path program 1 times [2020-10-28 00:43:46,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:46,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244325091] [2020-10-28 00:43:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:46,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking...