/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:41:00,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:41:00,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:41:00,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:41:00,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:41:00,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:41:00,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:41:00,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:41:00,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:41:00,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:41:00,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:41:00,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:41:00,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:41:00,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:41:00,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:41:00,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:41:00,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:41:00,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:41:00,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:41:00,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:41:00,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:41:00,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:41:00,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:41:00,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:41:00,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:41:00,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:41:00,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:41:00,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:41:00,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:41:00,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:41:00,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:41:00,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:41:00,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:41:00,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:41:00,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:41:00,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:41:00,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:41:00,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:41:00,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:41:00,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:41:00,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:41:00,597 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 00:41:00,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:41:00,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:41:00,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:41:00,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:41:00,662 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:41:00,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:41:00,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:41:00,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:41:00,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:41:00,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:41:00,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:41:00,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:41:00,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:41:00,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:41:00,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:41:00,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:41:00,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:41:00,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:41:00,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:41:00,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:41:00,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:41:00,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:41:00,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:41:00,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:41:00,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:41:01,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:41:01,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:41:01,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:41:01,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:41:01,195 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:41:01,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-28 00:41:01,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/074e17b2e/dd230b055af04ea9abdf28e256afdd41/FLAGfa2e9f899 [2020-10-28 00:41:02,279 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:41:02,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-28 00:41:02,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/074e17b2e/dd230b055af04ea9abdf28e256afdd41/FLAGfa2e9f899 [2020-10-28 00:41:02,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/074e17b2e/dd230b055af04ea9abdf28e256afdd41 [2020-10-28 00:41:02,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:41:02,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:41:02,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:41:02,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:41:02,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:41:02,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:41:02" (1/1) ... [2020-10-28 00:41:02,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13298b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:02, skipping insertion in model container [2020-10-28 00:41:02,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:41:02" (1/1) ... [2020-10-28 00:41:02,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:41:03,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:41:05,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:41:05,385 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:41:06,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:41:06,864 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:41:06,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06 WrapperNode [2020-10-28 00:41:06,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:41:06,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:41:06,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:41:06,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:41:06,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:06,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:06,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:06,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:07,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:07,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:07,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (1/1) ... [2020-10-28 00:41:07,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:41:07,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:41:07,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:41:07,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:41:07,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (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 00:41:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:41:07,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:41:07,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:41:07,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:41:07,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:41:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:41:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:41:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:41:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:41:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:41:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:41:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:41:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:41:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:41:14,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:41:14,056 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:41:14,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:14 BoogieIcfgContainer [2020-10-28 00:41:14,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:41:14,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:41:14,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:41:14,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:41:14,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:41:02" (1/3) ... [2020-10-28 00:41:14,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc13774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:14, skipping insertion in model container [2020-10-28 00:41:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:06" (2/3) ... [2020-10-28 00:41:14,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc13774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:14, skipping insertion in model container [2020-10-28 00:41:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:14" (3/3) ... [2020-10-28 00:41:14,077 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-28 00:41:14,090 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:41:14,097 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:41:14,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:41:14,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:41:14,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:41:14,150 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:41:14,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:41:14,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:41:14,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:41:14,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:41:14,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:41:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states. [2020-10-28 00:41:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 00:41:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:14,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:14,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash 459972113, now seen corresponding path program 1 times [2020-10-28 00:41:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:14,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816506354] [2020-10-28 00:41:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:15,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:16,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:17,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:19,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:19,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 00:41:19,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:41:19,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:41:19,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:41:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-28 00:41:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:41:19,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:41:20,437 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2020-10-28 00:41:21,660 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:41:21,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:21,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:21,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:21,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 00:41:21,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:21,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:21,933 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 00:41:21,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816506354] [2020-10-28 00:41:21,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:21,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:41:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647251674] [2020-10-28 00:41:21,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:41:21,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:41:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:21,963 INFO L87 Difference]: Start difference. First operand 2519 states. Second operand 5 states. [2020-10-28 00:41:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:42,317 INFO L93 Difference]: Finished difference Result 4268 states and 7408 transitions. [2020-10-28 00:41:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:42,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-28 00:41:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:42,361 INFO L225 Difference]: With dead ends: 4268 [2020-10-28 00:41:42,361 INFO L226 Difference]: Without dead ends: 2511 [2020-10-28 00:41:42,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:41:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-10-28 00:41:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-10-28 00:41:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-10-28 00:41:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4373 transitions. [2020-10-28 00:41:42,597 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4373 transitions. Word has length 323 [2020-10-28 00:41:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:42,601 INFO L481 AbstractCegarLoop]: Abstraction has 2511 states and 4373 transitions. [2020-10-28 00:41:42,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:41:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4373 transitions. [2020-10-28 00:41:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 00:41:42,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:42,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:42,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:41:42,618 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1575721341, now seen corresponding path program 1 times [2020-10-28 00:41:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:42,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016590414] [2020-10-28 00:41:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:42,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:47,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:47,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-28 00:41:47,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:41:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:41:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-28 00:41:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:41:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:41:49,293 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:41:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:49,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:49,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:49,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:49,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:49,521 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 00:41:49,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016590414] [2020-10-28 00:41:49,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:49,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:49,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603938447] [2020-10-28 00:41:49,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:49,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:49,529 INFO L87 Difference]: Start difference. First operand 2511 states and 4373 transitions. Second operand 4 states. [2020-10-28 00:42:09,165 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 445 [2020-10-28 00:42:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:10,991 INFO L93 Difference]: Finished difference Result 5948 states and 10245 transitions. [2020-10-28 00:42:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:10,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-10-28 00:42:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:11,018 INFO L225 Difference]: With dead ends: 5948 [2020-10-28 00:42:11,019 INFO L226 Difference]: Without dead ends: 4221 [2020-10-28 00:42:11,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2020-10-28 00:42:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4121. [2020-10-28 00:42:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-10-28 00:42:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 7109 transitions. [2020-10-28 00:42:11,168 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 7109 transitions. Word has length 332 [2020-10-28 00:42:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:11,169 INFO L481 AbstractCegarLoop]: Abstraction has 4121 states and 7109 transitions. [2020-10-28 00:42:11,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 7109 transitions. [2020-10-28 00:42:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 00:42:11,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:11,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:11,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:42:11,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1174427413, now seen corresponding path program 1 times [2020-10-28 00:42:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:11,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546038598] [2020-10-28 00:42:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:11,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:13,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:16,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-28 00:42:16,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:42:16,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 00:42:16,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-28 00:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 00:42:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:17,825 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:42:17,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:17,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:17,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:17,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:42:17,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:17,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:17,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:17,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:17,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:18,042 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 00:42:18,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546038598] [2020-10-28 00:42:18,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:18,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:18,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101919952] [2020-10-28 00:42:18,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:18,046 INFO L87 Difference]: Start difference. First operand 4121 states and 7109 transitions. Second operand 4 states. [2020-10-28 00:42:44,843 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:42:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:47,841 INFO L93 Difference]: Finished difference Result 10319 states and 17645 transitions. [2020-10-28 00:42:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:47,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 352 [2020-10-28 00:42:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:47,877 INFO L225 Difference]: With dead ends: 10319 [2020-10-28 00:42:47,877 INFO L226 Difference]: Without dead ends: 7130 [2020-10-28 00:42:47,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7130 states. [2020-10-28 00:42:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7130 to 7091. [2020-10-28 00:42:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7091 states. [2020-10-28 00:42:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 12089 transitions. [2020-10-28 00:42:48,147 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 12089 transitions. Word has length 352 [2020-10-28 00:42:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:48,148 INFO L481 AbstractCegarLoop]: Abstraction has 7091 states and 12089 transitions. [2020-10-28 00:42:48,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 12089 transitions. [2020-10-28 00:42:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-28 00:42:48,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:48,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:48,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:42:48,173 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 370981481, now seen corresponding path program 1 times [2020-10-28 00:42:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:48,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040789567] [2020-10-28 00:42:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:49,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:50,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:50,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:53,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:53,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 362 [2020-10-28 00:42:53,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 00:42:53,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:54,721 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:42:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:54,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:54,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:54,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:55,026 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 00:42:55,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040789567] [2020-10-28 00:42:55,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:55,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785962791] [2020-10-28 00:42:55,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:55,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:55,029 INFO L87 Difference]: Start difference. First operand 7091 states and 12089 transitions. Second operand 4 states. [2020-10-28 00:42:56,360 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:43:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:25,057 INFO L93 Difference]: Finished difference Result 14304 states and 24266 transitions. [2020-10-28 00:43:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:25,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2020-10-28 00:43:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:25,096 INFO L225 Difference]: With dead ends: 14304 [2020-10-28 00:43:25,096 INFO L226 Difference]: Without dead ends: 8525 [2020-10-28 00:43:25,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2020-10-28 00:43:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 8486. [2020-10-28 00:43:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8486 states. [2020-10-28 00:43:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 14385 transitions. [2020-10-28 00:43:25,378 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 14385 transitions. Word has length 354 [2020-10-28 00:43:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:25,379 INFO L481 AbstractCegarLoop]: Abstraction has 8486 states and 14385 transitions. [2020-10-28 00:43:25,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 14385 transitions. [2020-10-28 00:43:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-28 00:43:25,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:25,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:25,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:43:25,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash 441200299, now seen corresponding path program 1 times [2020-10-28 00:43:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:25,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333048392] [2020-10-28 00:43:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:30,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 362 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-28 00:43:30,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:43:30,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:32,075 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:43:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:32,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:32,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:32,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:32,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:32,248 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 00:43:32,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333048392] [2020-10-28 00:43:32,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:32,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:43:32,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400999743] [2020-10-28 00:43:32,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:43:32,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:43:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:43:32,251 INFO L87 Difference]: Start difference. First operand 8486 states and 14385 transitions. Second operand 4 states. [2020-10-28 00:43:33,665 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 00:44:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:44:03,891 INFO L93 Difference]: Finished difference Result 21770 states and 36828 transitions. [2020-10-28 00:44:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:44:03,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2020-10-28 00:44:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:44:03,933 INFO L225 Difference]: With dead ends: 21770 [2020-10-28 00:44:03,934 INFO L226 Difference]: Without dead ends: 15323 [2020-10-28 00:44:03,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:44:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15323 states. [2020-10-28 00:44:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15323 to 15319. [2020-10-28 00:44:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15319 states. [2020-10-28 00:44:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15319 states to 15319 states and 25902 transitions. [2020-10-28 00:44:04,513 INFO L78 Accepts]: Start accepts. Automaton has 15319 states and 25902 transitions. Word has length 354 [2020-10-28 00:44:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:44:04,513 INFO L481 AbstractCegarLoop]: Abstraction has 15319 states and 25902 transitions. [2020-10-28 00:44:04,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:44:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 15319 states and 25902 transitions. [2020-10-28 00:44:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-28 00:44:04,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:44:04,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:44:04,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:44:04,552 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:44:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:44:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -916735125, now seen corresponding path program 1 times [2020-10-28 00:44:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:44:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690114134] [2020-10-28 00:44:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:44:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:04,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:06,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:09,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 362 [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:44:09,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-28 00:44:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:44:09,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:11,166 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 00:44:11,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:44:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:11,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:11,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:44:11,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:44:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:11,315 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 00:44:11,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690114134] [2020-10-28 00:44:11,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:44:11,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:44:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000564288] [2020-10-28 00:44:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:44:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:44:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:44:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:44:11,319 INFO L87 Difference]: Start difference. First operand 15319 states and 25902 transitions. Second operand 4 states. [2020-10-28 00:44:12,762 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 442