/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:29:50,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:29:50,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:29:50,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:29:50,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:29:50,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:29:50,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:29:50,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:29:50,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:29:50,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:29:50,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:29:50,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:29:50,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:29:50,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:29:50,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:29:50,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:29:50,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:29:50,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:29:50,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:29:50,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:29:50,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:29:50,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:29:50,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:29:50,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:29:50,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:29:50,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:29:50,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:29:50,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:29:50,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:29:50,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:29:50,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:29:50,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:29:50,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:29:50,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:29:50,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:29:50,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:29:50,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:29:50,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:29:50,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:29:50,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:29:50,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:29:50,228 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 00:29:50,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:29:50,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:29:50,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:29:50,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:29:50,284 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:29:50,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:29:50,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:29:50,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:29:50,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:29:50,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:29:50,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:29:50,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:29:50,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:29:50,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:29:50,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:29:50,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:29:50,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:29:50,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:29:50,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:29:50,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:29:50,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:29:50,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:29:50,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:29:50,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:29:50,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:29:50,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:29:50,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:29:50,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:29:50,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:29:50,293 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:29:50,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:29:50,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:29:50,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:29:50,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:29:50,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:29:50,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:29:50,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f4eab39/5e3c3e91597e497fba06415f5b25ce14/FLAGb1f302943 [2020-10-28 00:29:51,527 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:29:51,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:29:51,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f4eab39/5e3c3e91597e497fba06415f5b25ce14/FLAGb1f302943 [2020-10-28 00:29:51,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f4eab39/5e3c3e91597e497fba06415f5b25ce14 [2020-10-28 00:29:51,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:29:51,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:29:51,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:29:51,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:29:51,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:29:51,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:29:51" (1/1) ... [2020-10-28 00:29:51,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c652ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:51, skipping insertion in model container [2020-10-28 00:29:51,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:29:51" (1/1) ... [2020-10-28 00:29:51,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:29:51,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:29:52,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:29:52,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:29:52,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:29:52,514 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:29:52,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52 WrapperNode [2020-10-28 00:29:52,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:29:52,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:29:52,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:29:52,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:29:52,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:29:52,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:29:52,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:29:52,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:29:52,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (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 00:29:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:29:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:29:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:29:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:29:52,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:29:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:29:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:29:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:29:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:29:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:29:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:29:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:29:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:29:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:29:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:29:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:29:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:29:53,717 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:29:53,717 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:29:53,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:29:53 BoogieIcfgContainer [2020-10-28 00:29:53,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:29:53,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:29:53,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:29:53,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:29:53,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:29:51" (1/3) ... [2020-10-28 00:29:53,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fce2cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:29:53, skipping insertion in model container [2020-10-28 00:29:53,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52" (2/3) ... [2020-10-28 00:29:53,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fce2cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:29:53, skipping insertion in model container [2020-10-28 00:29:53,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:29:53" (3/3) ... [2020-10-28 00:29:53,729 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:29:53,743 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:29:53,749 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:29:53,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:29:53,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:29:53,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:29:53,792 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:29:53,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:29:53,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:29:53,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:29:53,792 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:29:53,792 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:29:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 00:29:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:29:53,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:53,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:29:53,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:53,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 00:29:53,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:53,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938961676] [2020-10-28 00:29:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:55,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:57,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:29:57,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:29:57,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-28 00:29:57,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:57,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:29:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:29:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:29:57,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:29:57,637 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:57,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:57,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:57,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:57,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:29:57,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:57,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:57,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:57,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:29:57,737 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 00:29:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938961676] [2020-10-28 00:29:57,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:57,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:29:57,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670866816] [2020-10-28 00:29:57,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:29:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:29:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:57,776 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 6 states. [2020-10-28 00:29:58,225 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:29:59,646 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:00,054 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:00,508 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:30:00,884 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:01,017 INFO L93 Difference]: Finished difference Result 722 states and 1204 transitions. [2020-10-28 00:30:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:30:01,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:30:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:01,056 INFO L225 Difference]: With dead ends: 722 [2020-10-28 00:30:01,056 INFO L226 Difference]: Without dead ends: 601 [2020-10-28 00:30:01,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:30:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-28 00:30:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 238. [2020-10-28 00:30:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 00:30:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 375 transitions. [2020-10-28 00:30:01,159 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 375 transitions. Word has length 67 [2020-10-28 00:30:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:01,160 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 375 transitions. [2020-10-28 00:30:01,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:30:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 375 transitions. [2020-10-28 00:30:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:30:01,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:01,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:01,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:30:01,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1967253613, now seen corresponding path program 1 times [2020-10-28 00:30:01,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:01,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602120723] [2020-10-28 00:30:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:01,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:01,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:01,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:02,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:04,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:04,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:30:04,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:30:04,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3217 [2020-10-28 00:30:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:30:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:30:04,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:30:04,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 00:30:04,840 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:04,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:04,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:04,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:04,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:30:04,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:04,893 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 00:30:04,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602120723] [2020-10-28 00:30:04,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:04,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:30:04,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323166433] [2020-10-28 00:30:04,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:30:04,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:30:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:30:04,900 INFO L87 Difference]: Start difference. First operand 238 states and 375 transitions. Second operand 7 states. [2020-10-28 00:30:05,291 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:30:06,494 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:30:06,863 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:07,307 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:07,741 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:30:08,113 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:30:08,783 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:30:09,421 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:09,433 INFO L93 Difference]: Finished difference Result 1492 states and 2451 transitions. [2020-10-28 00:30:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:30:09,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 00:30:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:09,442 INFO L225 Difference]: With dead ends: 1492 [2020-10-28 00:30:09,443 INFO L226 Difference]: Without dead ends: 1315 [2020-10-28 00:30:09,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:30:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-10-28 00:30:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 695. [2020-10-28 00:30:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 00:30:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1134 transitions. [2020-10-28 00:30:09,548 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1134 transitions. Word has length 68 [2020-10-28 00:30:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:09,551 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1134 transitions. [2020-10-28 00:30:09,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:30:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1134 transitions. [2020-10-28 00:30:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:30:09,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:09,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:09,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:30:09,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -913645665, now seen corresponding path program 1 times [2020-10-28 00:30:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:09,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585734769] [2020-10-28 00:30:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:09,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:09,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:09,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:12,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:30:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:30:12,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:12,751 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:12,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:12,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:12,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:12,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:12,791 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 00:30:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585734769] [2020-10-28 00:30:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:12,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:12,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759964141] [2020-10-28 00:30:12,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:12,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:12,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:12,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:12,794 INFO L87 Difference]: Start difference. First operand 695 states and 1134 transitions. Second operand 5 states. [2020-10-28 00:30:13,151 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:14,219 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:14,345 INFO L93 Difference]: Finished difference Result 2439 states and 4034 transitions. [2020-10-28 00:30:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:30:14,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 00:30:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:14,360 INFO L225 Difference]: With dead ends: 2439 [2020-10-28 00:30:14,360 INFO L226 Difference]: Without dead ends: 1861 [2020-10-28 00:30:14,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:30:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2020-10-28 00:30:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1273. [2020-10-28 00:30:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2020-10-28 00:30:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2092 transitions. [2020-10-28 00:30:14,472 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2092 transitions. Word has length 69 [2020-10-28 00:30:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:14,473 INFO L481 AbstractCegarLoop]: Abstraction has 1273 states and 2092 transitions. [2020-10-28 00:30:14,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2092 transitions. [2020-10-28 00:30:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:30:14,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:14,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:14,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:30:14,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 114088646, now seen corresponding path program 1 times [2020-10-28 00:30:14,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:14,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625497682] [2020-10-28 00:30:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:14,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:16,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:16,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:30:16,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:30:16,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2351 [2020-10-28 00:30:16,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:30:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:30:16,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:17,228 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:17,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:17,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:17,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:17,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:17,272 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 00:30:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625497682] [2020-10-28 00:30:17,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:17,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:17,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647954736] [2020-10-28 00:30:17,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:17,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:17,277 INFO L87 Difference]: Start difference. First operand 1273 states and 2092 transitions. Second operand 5 states. [2020-10-28 00:30:17,679 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:18,720 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:18,928 INFO L93 Difference]: Finished difference Result 4711 states and 7798 transitions. [2020-10-28 00:30:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:30:18,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:30:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:18,951 INFO L225 Difference]: With dead ends: 4711 [2020-10-28 00:30:18,951 INFO L226 Difference]: Without dead ends: 3565 [2020-10-28 00:30:18,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:30:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2020-10-28 00:30:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2402. [2020-10-28 00:30:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-10-28 00:30:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3956 transitions. [2020-10-28 00:30:19,154 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3956 transitions. Word has length 70 [2020-10-28 00:30:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:19,155 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 3956 transitions. [2020-10-28 00:30:19,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3956 transitions. [2020-10-28 00:30:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:30:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:19,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:19,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:30:19,157 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2094232715, now seen corresponding path program 1 times [2020-10-28 00:30:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339753104] [2020-10-28 00:30:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:20,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:24,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:24,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:30:24,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:30:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:30:24,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 00:30:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:30:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:24,552 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:24,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:24,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:24,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:24,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:24,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:24,595 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 00:30:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339753104] [2020-10-28 00:30:24,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:24,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:24,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137373858] [2020-10-28 00:30:24,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:24,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:24,598 INFO L87 Difference]: Start difference. First operand 2402 states and 3956 transitions. Second operand 4 states. [2020-10-28 00:30:24,980 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:26,278 INFO L93 Difference]: Finished difference Result 6391 states and 10549 transitions. [2020-10-28 00:30:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:26,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:30:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:26,304 INFO L225 Difference]: With dead ends: 6391 [2020-10-28 00:30:26,305 INFO L226 Difference]: Without dead ends: 4066 [2020-10-28 00:30:26,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2020-10-28 00:30:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 4063. [2020-10-28 00:30:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4063 states. [2020-10-28 00:30:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 6667 transitions. [2020-10-28 00:30:26,617 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 6667 transitions. Word has length 71 [2020-10-28 00:30:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:26,619 INFO L481 AbstractCegarLoop]: Abstraction has 4063 states and 6667 transitions. [2020-10-28 00:30:26,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 6667 transitions. [2020-10-28 00:30:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:30:26,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:26,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:26,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:30:26,623 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2094711827, now seen corresponding path program 1 times [2020-10-28 00:30:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:26,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256312465] [2020-10-28 00:30:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:26,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:31,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:30:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:30:31,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:32,031 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:32,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:32,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:32,068 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 00:30:32,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256312465] [2020-10-28 00:30:32,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:32,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:32,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135960777] [2020-10-28 00:30:32,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:32,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:32,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:32,071 INFO L87 Difference]: Start difference. First operand 4063 states and 6667 transitions. Second operand 4 states. [2020-10-28 00:30:32,441 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:33,804 INFO L93 Difference]: Finished difference Result 10754 states and 17647 transitions. [2020-10-28 00:30:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:33,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:30:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:33,840 INFO L225 Difference]: With dead ends: 10754 [2020-10-28 00:30:33,841 INFO L226 Difference]: Without dead ends: 6784 [2020-10-28 00:30:33,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2020-10-28 00:30:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6781. [2020-10-28 00:30:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6781 states. [2020-10-28 00:30:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 11051 transitions. [2020-10-28 00:30:34,324 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 11051 transitions. Word has length 71 [2020-10-28 00:30:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:34,325 INFO L481 AbstractCegarLoop]: Abstraction has 6781 states and 11051 transitions. [2020-10-28 00:30:34,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 11051 transitions. [2020-10-28 00:30:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:30:34,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:34,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:34,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:30:34,327 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1034528335, now seen corresponding path program 1 times [2020-10-28 00:30:34,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:34,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711810832] [2020-10-28 00:30:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:34,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:39,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:30:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:30:39,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:39,796 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:39,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:39,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:39,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:39,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:39,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:30:39,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:39,846 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 00:30:39,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711810832] [2020-10-28 00:30:39,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:39,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33410072] [2020-10-28 00:30:39,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:39,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:39,855 INFO L87 Difference]: Start difference. First operand 6781 states and 11051 transitions. Second operand 4 states. [2020-10-28 00:30:40,295 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:30:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:41,801 INFO L93 Difference]: Finished difference Result 17731 states and 28831 transitions. [2020-10-28 00:30:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:41,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:30:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:41,857 INFO L225 Difference]: With dead ends: 17731 [2020-10-28 00:30:41,858 INFO L226 Difference]: Without dead ends: 11045 [2020-10-28 00:30:41,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11045 states. [2020-10-28 00:30:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11045 to 11008. [2020-10-28 00:30:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11008 states. [2020-10-28 00:30:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11008 states to 11008 states and 17745 transitions. [2020-10-28 00:30:42,692 INFO L78 Accepts]: Start accepts. Automaton has 11008 states and 17745 transitions. Word has length 71 [2020-10-28 00:30:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:42,693 INFO L481 AbstractCegarLoop]: Abstraction has 11008 states and 17745 transitions. [2020-10-28 00:30:42,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 11008 states and 17745 transitions. [2020-10-28 00:30:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:30:42,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:42,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:42,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:30:42,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -974900522, now seen corresponding path program 1 times [2020-10-28 00:30:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:42,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489101764] [2020-10-28 00:30:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:42,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:43,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:30:43,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:30:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:44,314 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:44,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:44,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:44,354 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 00:30:44,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489101764] [2020-10-28 00:30:44,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:44,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:44,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806087338] [2020-10-28 00:30:44,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:44,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:44,357 INFO L87 Difference]: Start difference. First operand 11008 states and 17745 transitions. Second operand 4 states. [2020-10-28 00:30:45,239 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:46,278 INFO L93 Difference]: Finished difference Result 27974 states and 44709 transitions. [2020-10-28 00:30:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:46,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 00:30:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:46,328 INFO L225 Difference]: With dead ends: 27974 [2020-10-28 00:30:46,328 INFO L226 Difference]: Without dead ends: 17027 [2020-10-28 00:30:46,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17027 states. [2020-10-28 00:30:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17027 to 17024. [2020-10-28 00:30:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17024 states. [2020-10-28 00:30:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 26561 transitions. [2020-10-28 00:30:47,405 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 26561 transitions. Word has length 72 [2020-10-28 00:30:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:47,406 INFO L481 AbstractCegarLoop]: Abstraction has 17024 states and 26561 transitions. [2020-10-28 00:30:47,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 26561 transitions. [2020-10-28 00:30:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:30:47,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:47,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:47,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:30:47,407 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:47,408 INFO L82 PathProgramCache]: Analyzing trace with hash 15864717, now seen corresponding path program 1 times [2020-10-28 00:30:47,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:47,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078934713] [2020-10-28 00:30:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:47,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:48,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:48,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:30:48,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:30:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-28 00:30:48,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:30:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:30:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:48,606 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:48,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:48,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:48,648 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 00:30:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078934713] [2020-10-28 00:30:48,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:48,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:48,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875026363] [2020-10-28 00:30:48,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:48,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:48,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:48,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:48,650 INFO L87 Difference]: Start difference. First operand 17024 states and 26561 transitions. Second operand 4 states. [2020-10-28 00:30:49,015 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:50,553 INFO L93 Difference]: Finished difference Result 38595 states and 60243 transitions. [2020-10-28 00:30:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:50,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:30:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:50,622 INFO L225 Difference]: With dead ends: 38595 [2020-10-28 00:30:50,622 INFO L226 Difference]: Without dead ends: 21632 [2020-10-28 00:30:50,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21632 states. [2020-10-28 00:30:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21632 to 21629. [2020-10-28 00:30:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21629 states. [2020-10-28 00:30:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21629 states to 21629 states and 33663 transitions. [2020-10-28 00:30:51,824 INFO L78 Accepts]: Start accepts. Automaton has 21629 states and 33663 transitions. Word has length 73 [2020-10-28 00:30:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:51,824 INFO L481 AbstractCegarLoop]: Abstraction has 21629 states and 33663 transitions. [2020-10-28 00:30:51,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21629 states and 33663 transitions. [2020-10-28 00:30:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:30:51,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:51,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:51,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:30:51,825 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1107276276, now seen corresponding path program 1 times [2020-10-28 00:30:51,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:51,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171985944] [2020-10-28 00:30:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:51,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:52,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:53,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2126 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:30:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:54,337 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:54,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:54,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:54,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:54,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:54,371 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 00:30:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171985944] [2020-10-28 00:30:54,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:54,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488610754] [2020-10-28 00:30:54,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:54,373 INFO L87 Difference]: Start difference. First operand 21629 states and 33663 transitions. Second operand 4 states. [2020-10-28 00:30:54,735 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:30:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:56,401 INFO L93 Difference]: Finished difference Result 48921 states and 76173 transitions. [2020-10-28 00:30:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:56,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 00:30:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:56,474 INFO L225 Difference]: With dead ends: 48921 [2020-10-28 00:30:56,474 INFO L226 Difference]: Without dead ends: 27400 [2020-10-28 00:30:56,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27400 states. [2020-10-28 00:30:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27400 to 27397. [2020-10-28 00:30:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27397 states. [2020-10-28 00:30:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27397 states to 27397 states and 42539 transitions. [2020-10-28 00:30:58,399 INFO L78 Accepts]: Start accepts. Automaton has 27397 states and 42539 transitions. Word has length 75 [2020-10-28 00:30:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:58,399 INFO L481 AbstractCegarLoop]: Abstraction has 27397 states and 42539 transitions. [2020-10-28 00:30:58,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27397 states and 42539 transitions. [2020-10-28 00:30:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:30:58,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:58,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:58,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:30:58,401 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash 21846219, now seen corresponding path program 1 times [2020-10-28 00:30:58,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:58,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123321733] [2020-10-28 00:30:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:59,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:03,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:31:03,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4874 [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:31:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:03,657 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:31:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:03,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:03,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:03,685 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 00:31:03,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123321733] [2020-10-28 00:31:03,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:03,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471158061] [2020-10-28 00:31:03,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:03,688 INFO L87 Difference]: Start difference. First operand 27397 states and 42539 transitions. Second operand 4 states. [2020-10-28 00:31:04,044 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:31:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:05,962 INFO L93 Difference]: Finished difference Result 58614 states and 91247 transitions. [2020-10-28 00:31:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:05,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 00:31:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:06,052 INFO L225 Difference]: With dead ends: 58614 [2020-10-28 00:31:06,052 INFO L226 Difference]: Without dead ends: 31312 [2020-10-28 00:31:06,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2020-10-28 00:31:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 31309. [2020-10-28 00:31:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31309 states. [2020-10-28 00:31:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31309 states to 31309 states and 48566 transitions. [2020-10-28 00:31:07,768 INFO L78 Accepts]: Start accepts. Automaton has 31309 states and 48566 transitions. Word has length 77 [2020-10-28 00:31:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:07,768 INFO L481 AbstractCegarLoop]: Abstraction has 31309 states and 48566 transitions. [2020-10-28 00:31:07,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 31309 states and 48566 transitions. [2020-10-28 00:31:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 00:31:07,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:07,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:07,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:31:07,769 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash 730232441, now seen corresponding path program 1 times [2020-10-28 00:31:07,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:07,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736214891] [2020-10-28 00:31:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:07,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:08,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:08,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:31:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:31:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:31:12,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:13,214 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:31:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:13,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:13,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:13,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:13,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:31:13,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:13,260 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 00:31:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736214891] [2020-10-28 00:31:13,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:13,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:31:13,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054904865] [2020-10-28 00:31:13,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:31:13,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:31:13,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:31:13,262 INFO L87 Difference]: Start difference. First operand 31309 states and 48566 transitions. Second operand 6 states. [2020-10-28 00:31:13,675 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:31:14,822 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:31:15,256 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:31:15,781 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:31:17,381 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:31:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:18,355 INFO L93 Difference]: Finished difference Result 89365 states and 138818 transitions. [2020-10-28 00:31:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:31:18,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 00:31:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:18,471 INFO L225 Difference]: With dead ends: 89365 [2020-10-28 00:31:18,472 INFO L226 Difference]: Without dead ends: 58151 [2020-10-28 00:31:18,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:31:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58151 states. [2020-10-28 00:31:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58151 to 31309. [2020-10-28 00:31:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31309 states. [2020-10-28 00:31:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31309 states to 31309 states and 48425 transitions. [2020-10-28 00:31:20,518 INFO L78 Accepts]: Start accepts. Automaton has 31309 states and 48425 transitions. Word has length 78 [2020-10-28 00:31:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:20,518 INFO L481 AbstractCegarLoop]: Abstraction has 31309 states and 48425 transitions. [2020-10-28 00:31:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:31:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 31309 states and 48425 transitions. [2020-10-28 00:31:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:31:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:20,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:20,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:31:20,520 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 897598347, now seen corresponding path program 1 times [2020-10-28 00:31:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692185582] [2020-10-28 00:31:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:31:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 00:31:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:31:25,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:25,974 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:31:25,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:25,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:25,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:25,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:25,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:31:25,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:26,009 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 00:31:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692185582] [2020-10-28 00:31:26,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:26,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:31:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812550343] [2020-10-28 00:31:26,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:31:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:31:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:31:26,011 INFO L87 Difference]: Start difference. First operand 31309 states and 48425 transitions. Second operand 6 states. [2020-10-28 00:31:26,427 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:31:27,636 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:31:28,082 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:31:28,630 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:31:31,537 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:31:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:34,300 INFO L93 Difference]: Finished difference Result 138591 states and 214961 transitions. [2020-10-28 00:31:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:31:34,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:31:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:34,484 INFO L225 Difference]: With dead ends: 138591 [2020-10-28 00:31:34,485 INFO L226 Difference]: Without dead ends: 107377 [2020-10-28 00:31:34,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:31:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107377 states. [2020-10-28 00:31:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107377 to 57826. [2020-10-28 00:31:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-10-28 00:31:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 89171 transitions. [2020-10-28 00:31:38,851 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 89171 transitions. Word has length 81 [2020-10-28 00:31:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:38,851 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 89171 transitions. [2020-10-28 00:31:38,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:31:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 89171 transitions. [2020-10-28 00:31:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:31:38,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:38,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:38,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:31:38,853 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1996216828, now seen corresponding path program 1 times [2020-10-28 00:31:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:38,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083005875] [2020-10-28 00:31:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:38,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:31:43,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:31:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:44,278 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:31:44,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:44,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:44,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:44,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:44,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:44,315 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 00:31:44,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083005875] [2020-10-28 00:31:44,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:31:44,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666959659] [2020-10-28 00:31:44,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:31:44,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:31:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:44,317 INFO L87 Difference]: Start difference. First operand 57826 states and 89171 transitions. Second operand 5 states. [2020-10-28 00:31:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:49,901 INFO L93 Difference]: Finished difference Result 80078 states and 122367 transitions. [2020-10-28 00:31:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:31:49,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:31:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:50,016 INFO L225 Difference]: With dead ends: 80078 [2020-10-28 00:31:50,016 INFO L226 Difference]: Without dead ends: 80075 [2020-10-28 00:31:50,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:31:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80075 states. [2020-10-28 00:31:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80075 to 58318. [2020-10-28 00:31:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58318 states. [2020-10-28 00:31:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58318 states to 58318 states and 89618 transitions. [2020-10-28 00:31:54,288 INFO L78 Accepts]: Start accepts. Automaton has 58318 states and 89618 transitions. Word has length 82 [2020-10-28 00:31:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:54,288 INFO L481 AbstractCegarLoop]: Abstraction has 58318 states and 89618 transitions. [2020-10-28 00:31:54,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:31:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 58318 states and 89618 transitions. [2020-10-28 00:31:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:31:54,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:54,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:54,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:31:54,293 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2020775779, now seen corresponding path program 1 times [2020-10-28 00:31:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:54,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006595869] [2020-10-28 00:31:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:54,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:59,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:31:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:59,709 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:31:59,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:59,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006595869] [2020-10-28 00:31:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:59,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381723992] [2020-10-28 00:31:59,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:59,746 INFO L87 Difference]: Start difference. First operand 58318 states and 89618 transitions. Second operand 4 states. [2020-10-28 00:32:01,468 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:32:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:04,305 INFO L93 Difference]: Finished difference Result 104800 states and 161210 transitions. [2020-10-28 00:32:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:04,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:32:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:04,376 INFO L225 Difference]: With dead ends: 104800 [2020-10-28 00:32:04,376 INFO L226 Difference]: Without dead ends: 46577 [2020-10-28 00:32:04,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46577 states. [2020-10-28 00:32:07,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46577 to 46513. [2020-10-28 00:32:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46513 states. [2020-10-28 00:32:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46513 states to 46513 states and 71132 transitions. [2020-10-28 00:32:07,817 INFO L78 Accepts]: Start accepts. Automaton has 46513 states and 71132 transitions. Word has length 106 [2020-10-28 00:32:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:07,817 INFO L481 AbstractCegarLoop]: Abstraction has 46513 states and 71132 transitions. [2020-10-28 00:32:07,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46513 states and 71132 transitions. [2020-10-28 00:32:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:32:07,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:07,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:07,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:32:07,821 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1288871803, now seen corresponding path program 1 times [2020-10-28 00:32:07,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:07,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537933856] [2020-10-28 00:32:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:07,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:08,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:12,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:12,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:32:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:13,252 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:32:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:13,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:13,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:13,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:13,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537933856] [2020-10-28 00:32:13,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:13,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:32:13,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623944651] [2020-10-28 00:32:13,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:32:13,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:32:13,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:32:13,292 INFO L87 Difference]: Start difference. First operand 46513 states and 71132 transitions. Second operand 4 states. [2020-10-28 00:32:14,808 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:32:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:16,097 INFO L93 Difference]: Finished difference Result 66860 states and 102285 transitions. [2020-10-28 00:32:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:16,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:32:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:16,127 INFO L225 Difference]: With dead ends: 66860 [2020-10-28 00:32:16,127 INFO L226 Difference]: Without dead ends: 20442 [2020-10-28 00:32:16,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20442 states. [2020-10-28 00:32:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20442 to 19927. [2020-10-28 00:32:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19927 states. [2020-10-28 00:32:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19927 states to 19927 states and 30383 transitions. [2020-10-28 00:32:17,709 INFO L78 Accepts]: Start accepts. Automaton has 19927 states and 30383 transitions. Word has length 106 [2020-10-28 00:32:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:17,710 INFO L481 AbstractCegarLoop]: Abstraction has 19927 states and 30383 transitions. [2020-10-28 00:32:17,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19927 states and 30383 transitions. [2020-10-28 00:32:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:32:17,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:17,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:17,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:32:17,712 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash 680341659, now seen corresponding path program 1 times [2020-10-28 00:32:17,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:17,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443789102] [2020-10-28 00:32:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:17,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:17,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:17,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:18,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:18,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:20,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:32:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:23,124 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:32:23,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:23,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443789102] [2020-10-28 00:32:23,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:32:23,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:32:23,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790747145] [2020-10-28 00:32:23,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:32:23,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:23,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:32:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:23,159 INFO L87 Difference]: Start difference. First operand 19927 states and 30383 transitions. Second operand 6 states. [2020-10-28 00:32:23,571 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:32:24,735 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:32:25,145 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:32:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:27,498 INFO L93 Difference]: Finished difference Result 51687 states and 79095 transitions. [2020-10-28 00:32:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:32:27,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-28 00:32:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:27,539 INFO L225 Difference]: With dead ends: 51687 [2020-10-28 00:32:27,539 INFO L226 Difference]: Without dead ends: 31880 [2020-10-28 00:32:27,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:32:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31880 states. [2020-10-28 00:32:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31880 to 31874. [2020-10-28 00:32:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31874 states. [2020-10-28 00:32:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31874 states to 31874 states and 48520 transitions. [2020-10-28 00:32:29,776 INFO L78 Accepts]: Start accepts. Automaton has 31874 states and 48520 transitions. Word has length 107 [2020-10-28 00:32:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:29,776 INFO L481 AbstractCegarLoop]: Abstraction has 31874 states and 48520 transitions. [2020-10-28 00:32:29,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:32:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 31874 states and 48520 transitions. [2020-10-28 00:32:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:32:29,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:29,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:29,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:32:29,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:29,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1183414255, now seen corresponding path program 1 times [2020-10-28 00:32:29,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:29,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594351337] [2020-10-28 00:32:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:32:34,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:35,184 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:32:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:35,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:35,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:35,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:35,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594351337] [2020-10-28 00:32:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:35,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:32:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192049759] [2020-10-28 00:32:35,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:32:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:32:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:32:35,218 INFO L87 Difference]: Start difference. First operand 31874 states and 48520 transitions. Second operand 4 states. [2020-10-28 00:32:36,538 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:32:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:37,287 INFO L93 Difference]: Finished difference Result 44682 states and 68039 transitions. [2020-10-28 00:32:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:37,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:32:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:37,309 INFO L225 Difference]: With dead ends: 44682 [2020-10-28 00:32:37,309 INFO L226 Difference]: Without dead ends: 12928 [2020-10-28 00:32:37,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2020-10-28 00:32:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 12857. [2020-10-28 00:32:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12857 states. [2020-10-28 00:32:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12857 states to 12857 states and 19460 transitions. [2020-10-28 00:32:38,344 INFO L78 Accepts]: Start accepts. Automaton has 12857 states and 19460 transitions. Word has length 107 [2020-10-28 00:32:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:38,344 INFO L481 AbstractCegarLoop]: Abstraction has 12857 states and 19460 transitions. [2020-10-28 00:32:38,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 12857 states and 19460 transitions. [2020-10-28 00:32:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:32:38,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:38,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:38,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:32:38,346 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:38,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1103017589, now seen corresponding path program 1 times [2020-10-28 00:32:38,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:38,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198636953] [2020-10-28 00:32:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:38,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:40,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:40,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:40,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:32:43,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:32:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:32:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:43,762 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:32:43,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:43,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:43,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:43,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:43,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198636953] [2020-10-28 00:32:43,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:32:43,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:32:43,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417139002] [2020-10-28 00:32:43,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:32:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:32:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:43,798 INFO L87 Difference]: Start difference. First operand 12857 states and 19460 transitions. Second operand 6 states. [2020-10-28 00:32:44,203 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:32:45,343 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:32:45,729 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:32:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:46,997 INFO L93 Difference]: Finished difference Result 22471 states and 34090 transitions. [2020-10-28 00:32:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:32:46,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-28 00:32:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:47,019 INFO L225 Difference]: With dead ends: 22471 [2020-10-28 00:32:47,020 INFO L226 Difference]: Without dead ends: 15943 [2020-10-28 00:32:47,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:32:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15943 states. [2020-10-28 00:32:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15943 to 15813. [2020-10-28 00:32:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15813 states. [2020-10-28 00:32:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15813 states to 15813 states and 23962 transitions. [2020-10-28 00:32:48,204 INFO L78 Accepts]: Start accepts. Automaton has 15813 states and 23962 transitions. Word has length 108 [2020-10-28 00:32:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:48,204 INFO L481 AbstractCegarLoop]: Abstraction has 15813 states and 23962 transitions. [2020-10-28 00:32:48,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:32:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 15813 states and 23962 transitions. [2020-10-28 00:32:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:32:48,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:48,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:48,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:32:48,212 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1060091061, now seen corresponding path program 1 times [2020-10-28 00:32:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:48,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501425655] [2020-10-28 00:32:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:53,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:53,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:32:53,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:32:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:32:53,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:32:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:32:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 00:32:53,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:53,628 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:32:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:53,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:53,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:53,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:53,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:32:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:53,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:32:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501425655] [2020-10-28 00:32:53,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:32:53,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:32:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061061437] [2020-10-28 00:32:53,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:32:53,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:53,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:32:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:53,661 INFO L87 Difference]: Start difference. First operand 15813 states and 23962 transitions. Second operand 6 states. [2020-10-28 00:32:54,070 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:32:55,230 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:32:55,583 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:32:55,965 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:32:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:58,078 INFO L93 Difference]: Finished difference Result 42672 states and 64690 transitions. [2020-10-28 00:32:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:32:58,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-28 00:32:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:58,119 INFO L225 Difference]: With dead ends: 42672 [2020-10-28 00:32:58,119 INFO L226 Difference]: Without dead ends: 26979 [2020-10-28 00:32:58,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:32:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26979 states. [2020-10-28 00:32:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26979 to 22734. [2020-10-28 00:32:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22734 states. [2020-10-28 00:32:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22734 states to 22734 states and 34409 transitions. [2020-10-28 00:32:59,921 INFO L78 Accepts]: Start accepts. Automaton has 22734 states and 34409 transitions. Word has length 108 [2020-10-28 00:32:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:59,921 INFO L481 AbstractCegarLoop]: Abstraction has 22734 states and 34409 transitions. [2020-10-28 00:32:59,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:32:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22734 states and 34409 transitions. [2020-10-28 00:32:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:32:59,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:59,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:32:59,926 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 787398917, now seen corresponding path program 1 times [2020-10-28 00:32:59,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:59,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908083484] [2020-10-28 00:32:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:00,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:04,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:33:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:33:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 00:33:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:05,369 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:33:05,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:33:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:05,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:05,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:33:05,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:33:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:33:05,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:33:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:33:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:33:05,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 00:33:05,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908083484] [2020-10-28 00:33:05,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:33:05,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:33:05,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917296817] [2020-10-28 00:33:05,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:33:05,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:33:05,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:33:05,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:33:05,418 INFO L87 Difference]: Start difference. First operand 22734 states and 34409 transitions. Second operand 5 states. [2020-10-28 00:33:05,798 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:33:06,944 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:33:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:33:09,249 INFO L93 Difference]: Finished difference Result 52903 states and 79488 transitions. [2020-10-28 00:33:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:33:09,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 00:33:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:33:09,284 INFO L225 Difference]: With dead ends: 52903 [2020-10-28 00:33:09,285 INFO L226 Difference]: Without dead ends: 30289 [2020-10-28 00:33:09,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:33:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30289 states. [2020-10-28 00:33:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30289 to 23736. [2020-10-28 00:33:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23736 states. [2020-10-28 00:33:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23736 states to 23736 states and 35825 transitions. [2020-10-28 00:33:11,037 INFO L78 Accepts]: Start accepts. Automaton has 23736 states and 35825 transitions. Word has length 109 [2020-10-28 00:33:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:33:11,037 INFO L481 AbstractCegarLoop]: Abstraction has 23736 states and 35825 transitions. [2020-10-28 00:33:11,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:33:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 23736 states and 35825 transitions. [2020-10-28 00:33:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:33:11,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:33:11,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:33:11,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:33:11,039 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:33:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:33:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1590854287, now seen corresponding path program 1 times [2020-10-28 00:33:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:33:11,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686454645] [2020-10-28 00:33:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:33:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:16,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 00:33:16,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:16,559 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:33:16,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:33:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:16,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:16,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:33:16,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:33:16,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:33:16,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:33:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:33:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:33:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 00:33:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686454645] [2020-10-28 00:33:16,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:33:16,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:33:16,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10509407] [2020-10-28 00:33:16,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:33:16,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:33:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:33:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:33:16,608 INFO L87 Difference]: Start difference. First operand 23736 states and 35825 transitions. Second operand 5 states. [2020-10-28 00:33:17,032 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:33:18,071 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:33:18,806 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:33:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:33:21,872 INFO L93 Difference]: Finished difference Result 52637 states and 79528 transitions. [2020-10-28 00:33:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:33:21,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 00:33:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:33:21,925 INFO L225 Difference]: With dead ends: 52637 [2020-10-28 00:33:21,925 INFO L226 Difference]: Without dead ends: 38167 [2020-10-28 00:33:21,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:33:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38167 states.