/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=SHALLOWEST --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.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:00:07,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:00:07,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:00:07,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:00:07,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:00:07,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:00:07,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:00:07,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:00:07,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:00:07,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:00:07,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:00:07,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:00:07,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:00:07,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:00:07,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:00:07,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:00:07,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:00:07,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:00:07,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:00:07,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:00:07,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:00:07,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:00:07,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:00:07,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:00:07,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:00:07,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:00:07,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:00:07,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:00:07,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:00:07,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:00:07,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:00:07,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:00:07,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:00:07,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:00:07,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:00:07,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:00:07,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:00:07,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:00:07,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:00:07,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:00:07,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:00:07,223 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 [2020-10-27 06:00:07,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:00:07,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:00:07,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:00:07,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:00:07,286 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:00:07,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:00:07,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:00:07,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:00:07,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:00:07,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:00:07,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:00:07,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:00:07,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:00:07,289 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:00:07,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:00:07,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:00:07,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:00:07,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:00:07,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:00:07,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:00:07,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:00:07,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:00:07,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:00:07,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:00:07,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:00:07,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:00:07,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:00:07,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:00:07,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:00:07,293 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:00:07,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:00:07,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:00:07,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:00:07,740 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:00:07,741 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:00:07,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:00:07,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c36b5a13/4322d8aed80243b3b9822755b033d7bd/FLAGe27279b8e [2020-10-27 06:00:08,509 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:00:08,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:00:08,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c36b5a13/4322d8aed80243b3b9822755b033d7bd/FLAGe27279b8e [2020-10-27 06:00:08,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c36b5a13/4322d8aed80243b3b9822755b033d7bd [2020-10-27 06:00:08,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:00:08,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:00:08,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:00:08,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:00:08,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:00:08,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:00:08" (1/1) ... [2020-10-27 06:00:08,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e538ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:08, skipping insertion in model container [2020-10-27 06:00:08,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:00:08" (1/1) ... [2020-10-27 06:00:08,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:00:08,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:00:09,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:00:09,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:00:09,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:00:09,673 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:00:09,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09 WrapperNode [2020-10-27 06:00:09,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:00:09,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:00:09,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:00:09,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:00:09,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (1/1) ... [2020-10-27 06:00:09,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:00:09,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:00:09,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:00:09,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:00:09,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (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 [2020-10-27 06:00:09,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:00:09,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:00:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:00:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 06:00:09,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:00:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:00:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:00:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:00:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:00:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 06:00:09,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 06:00:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:00:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 06:00:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 06:00:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 06:00:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 06:00:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:00:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:00:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:00:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:00:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:00:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:00:11,413 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:00:11,413 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 06:00:11,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:00:11 BoogieIcfgContainer [2020-10-27 06:00:11,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:00:11,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:00:11,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:00:11,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:00:11,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:00:08" (1/3) ... [2020-10-27 06:00:11,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d1594d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:00:11, skipping insertion in model container [2020-10-27 06:00:11,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:09" (2/3) ... [2020-10-27 06:00:11,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d1594d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:00:11, skipping insertion in model container [2020-10-27 06:00:11,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:00:11" (3/3) ... [2020-10-27 06:00:11,425 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:00:11,437 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:00:11,443 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:00:11,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:00:11,488 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:00:11,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:00:11,489 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:00:11,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:00:11,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:00:11,489 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:00:11,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:00:11,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:00:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states. [2020-10-27 06:00:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 06:00:11,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:11,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:11,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash -388104051, now seen corresponding path program 1 times [2020-10-27 06:00:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:11,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122626114] [2020-10-27 06:00:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:12,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:12,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:12,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:14,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:16,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:17,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 06:00:17,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:00:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 06:00:17,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:17,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:17,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 06:00:17,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 06:00:17,710 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:00:17,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:17,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:17,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:00:17,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:17,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:00:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:17,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122626114] [2020-10-27 06:00:17,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:17,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119244647] [2020-10-27 06:00:17,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:17,893 INFO L87 Difference]: Start difference. First operand 340 states. Second operand 5 states. [2020-10-27 06:00:21,089 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:22,228 INFO L93 Difference]: Finished difference Result 957 states and 1684 transitions. [2020-10-27 06:00:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:00:22,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 06:00:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:22,278 INFO L225 Difference]: With dead ends: 957 [2020-10-27 06:00:22,279 INFO L226 Difference]: Without dead ends: 630 [2020-10-27 06:00:22,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:00:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-10-27 06:00:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 627. [2020-10-27 06:00:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-27 06:00:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 906 transitions. [2020-10-27 06:00:22,470 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 906 transitions. Word has length 157 [2020-10-27 06:00:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:22,471 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 906 transitions. [2020-10-27 06:00:22,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 906 transitions. [2020-10-27 06:00:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 06:00:22,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:22,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:22,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:00:22,478 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash 967009116, now seen corresponding path program 1 times [2020-10-27 06:00:22,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:22,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340265353] [2020-10-27 06:00:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:23,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:24,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:27,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:27,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 06:00:27,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:00:27,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 06:00:27,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:27,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 06:00:27,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:27,993 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:00:27,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:28,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:28,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:28,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:28,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:00:28,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:28,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:28,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:28,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:00:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:28,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340265353] [2020-10-27 06:00:28,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:28,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889114283] [2020-10-27 06:00:28,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:28,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:28,132 INFO L87 Difference]: Start difference. First operand 627 states and 906 transitions. Second operand 5 states. [2020-10-27 06:00:30,248 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:31,395 INFO L93 Difference]: Finished difference Result 1791 states and 2574 transitions. [2020-10-27 06:00:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:00:31,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-27 06:00:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:31,404 INFO L225 Difference]: With dead ends: 1791 [2020-10-27 06:00:31,404 INFO L226 Difference]: Without dead ends: 1192 [2020-10-27 06:00:31,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:00:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-10-27 06:00:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1189. [2020-10-27 06:00:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2020-10-27 06:00:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1693 transitions. [2020-10-27 06:00:31,493 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1693 transitions. Word has length 158 [2020-10-27 06:00:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:31,493 INFO L481 AbstractCegarLoop]: Abstraction has 1189 states and 1693 transitions. [2020-10-27 06:00:31,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1693 transitions. [2020-10-27 06:00:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 06:00:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:31,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:31,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:00:31,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash 525271787, now seen corresponding path program 1 times [2020-10-27 06:00:31,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:31,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001728650] [2020-10-27 06:00:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:32,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:32,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:32,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:33,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:36,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:36,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 06:00:36,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:00:36,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 06:00:36,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 06:00:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:37,038 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:00:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:37,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:37,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:37,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 06:00:37,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:00:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001728650] [2020-10-27 06:00:37,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:37,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282335981] [2020-10-27 06:00:37,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:37,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:37,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:37,182 INFO L87 Difference]: Start difference. First operand 1189 states and 1693 transitions. Second operand 5 states. [2020-10-27 06:00:39,219 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:40,308 INFO L93 Difference]: Finished difference Result 3493 states and 4960 transitions. [2020-10-27 06:00:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:00:40,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-27 06:00:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:40,321 INFO L225 Difference]: With dead ends: 3493 [2020-10-27 06:00:40,322 INFO L226 Difference]: Without dead ends: 2315 [2020-10-27 06:00:40,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:00:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-27 06:00:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2312. [2020-10-27 06:00:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-10-27 06:00:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3257 transitions. [2020-10-27 06:00:40,462 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3257 transitions. Word has length 159 [2020-10-27 06:00:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:40,464 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 3257 transitions. [2020-10-27 06:00:40,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3257 transitions. [2020-10-27 06:00:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 06:00:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:40,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:40,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:00:40,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1558737125, now seen corresponding path program 1 times [2020-10-27 06:00:40,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:40,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892884330] [2020-10-27 06:00:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:40,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:42,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:45,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:45,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 06:00:45,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:00:45,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 06:00:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 06:00:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:46,086 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:00:46,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:46,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:46,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:46,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:00:46,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:46,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892884330] [2020-10-27 06:00:46,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:46,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445624598] [2020-10-27 06:00:46,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:46,204 INFO L87 Difference]: Start difference. First operand 2312 states and 3257 transitions. Second operand 5 states. [2020-10-27 06:00:48,424 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:49,622 INFO L93 Difference]: Finished difference Result 6651 states and 9318 transitions. [2020-10-27 06:00:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:00:49,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-27 06:00:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:49,649 INFO L225 Difference]: With dead ends: 6651 [2020-10-27 06:00:49,649 INFO L226 Difference]: Without dead ends: 4422 [2020-10-27 06:00:49,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:00:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2020-10-27 06:00:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 4419. [2020-10-27 06:00:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2020-10-27 06:00:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 6126 transitions. [2020-10-27 06:00:49,882 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 6126 transitions. Word has length 160 [2020-10-27 06:00:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:49,882 INFO L481 AbstractCegarLoop]: Abstraction has 4419 states and 6126 transitions. [2020-10-27 06:00:49,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 6126 transitions. [2020-10-27 06:00:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 06:00:49,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:49,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:49,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:00:49,892 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1569803499, now seen corresponding path program 1 times [2020-10-27 06:00:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:49,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539701397] [2020-10-27 06:00:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:49,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:54,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:54,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:54,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 06:00:54,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:00:54,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 06:00:54,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:54,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:54,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:54,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 06:00:54,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:55,524 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:00:55,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:55,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:55,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:55,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:00:55,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:55,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539701397] [2020-10-27 06:00:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:55,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865790996] [2020-10-27 06:00:55,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:55,634 INFO L87 Difference]: Start difference. First operand 4419 states and 6126 transitions. Second operand 5 states. [2020-10-27 06:00:58,132 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:59,397 INFO L93 Difference]: Finished difference Result 11881 states and 16536 transitions. [2020-10-27 06:00:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:00:59,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 06:00:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:59,445 INFO L225 Difference]: With dead ends: 11881 [2020-10-27 06:00:59,445 INFO L226 Difference]: Without dead ends: 8494 [2020-10-27 06:00:59,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:00:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2020-10-27 06:00:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 8491. [2020-10-27 06:00:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8491 states. [2020-10-27 06:00:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8491 states to 8491 states and 11596 transitions. [2020-10-27 06:00:59,946 INFO L78 Accepts]: Start accepts. Automaton has 8491 states and 11596 transitions. Word has length 161 [2020-10-27 06:00:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:59,948 INFO L481 AbstractCegarLoop]: Abstraction has 8491 states and 11596 transitions. [2020-10-27 06:00:59,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8491 states and 11596 transitions. [2020-10-27 06:00:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 06:00:59,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:59,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:59,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:00:59,966 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash 886572219, now seen corresponding path program 1 times [2020-10-27 06:00:59,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:59,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238244835] [2020-10-27 06:00:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:05,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:01:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 06:01:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:05,609 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:05,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:05,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:05,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:05,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:05,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 06:01:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238244835] [2020-10-27 06:01:05,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:05,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:05,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095379724] [2020-10-27 06:01:05,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:05,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:05,696 INFO L87 Difference]: Start difference. First operand 8491 states and 11596 transitions. Second operand 5 states. [2020-10-27 06:01:08,553 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:09,935 INFO L93 Difference]: Finished difference Result 23818 states and 32630 transitions. [2020-10-27 06:01:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:01:09,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-27 06:01:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:09,998 INFO L225 Difference]: With dead ends: 23818 [2020-10-27 06:01:09,998 INFO L226 Difference]: Without dead ends: 16503 [2020-10-27 06:01:10,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:01:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2020-10-27 06:01:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 16500. [2020-10-27 06:01:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16500 states. [2020-10-27 06:01:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 22234 transitions. [2020-10-27 06:01:11,136 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 22234 transitions. Word has length 162 [2020-10-27 06:01:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 16500 states and 22234 transitions. [2020-10-27 06:01:11,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 22234 transitions. [2020-10-27 06:01:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 06:01:11,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:11,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:11,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:01:11,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 668681738, now seen corresponding path program 1 times [2020-10-27 06:01:11,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:11,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284747071] [2020-10-27 06:01:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:11,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 06:01:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 06:01:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:16,761 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:16,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:16,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:16,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:16,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:01:16,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:01:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:16,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284747071] [2020-10-27 06:01:16,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:16,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508553648] [2020-10-27 06:01:16,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:16,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:16,881 INFO L87 Difference]: Start difference. First operand 16500 states and 22234 transitions. Second operand 5 states. [2020-10-27 06:01:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:19,347 INFO L93 Difference]: Finished difference Result 26775 states and 36127 transitions. [2020-10-27 06:01:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:01:19,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-27 06:01:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:19,378 INFO L225 Difference]: With dead ends: 26775 [2020-10-27 06:01:19,378 INFO L226 Difference]: Without dead ends: 10589 [2020-10-27 06:01:19,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:01:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2020-10-27 06:01:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 10589. [2020-10-27 06:01:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10589 states. [2020-10-27 06:01:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 14246 transitions. [2020-10-27 06:01:19,986 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 14246 transitions. Word has length 163 [2020-10-27 06:01:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:19,987 INFO L481 AbstractCegarLoop]: Abstraction has 10589 states and 14246 transitions. [2020-10-27 06:01:19,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 14246 transitions. [2020-10-27 06:01:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 06:01:20,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:20,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:20,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 06:01:20,002 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -832568841, now seen corresponding path program 1 times [2020-10-27 06:01:20,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:20,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373419388] [2020-10-27 06:01:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:22,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:25,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 06:01:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:01:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 06:01:25,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:01:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:01:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 06:01:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:25,511 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:25,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:25,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:25,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 06:01:25,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:01:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:01:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:25,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373419388] [2020-10-27 06:01:25,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:25,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:01:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121057307] [2020-10-27 06:01:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:01:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:01:25,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:01:25,644 INFO L87 Difference]: Start difference. First operand 10589 states and 14246 transitions. Second operand 9 states. [2020-10-27 06:01:26,081 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:28,480 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:01:28,969 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:01:30,661 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:01:31,093 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 06:01:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:31,923 INFO L93 Difference]: Finished difference Result 33685 states and 48078 transitions. [2020-10-27 06:01:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:01:31,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2020-10-27 06:01:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:31,983 INFO L225 Difference]: With dead ends: 33685 [2020-10-27 06:01:31,983 INFO L226 Difference]: Without dead ends: 25966 [2020-10-27 06:01:32,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 06:01:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25966 states. [2020-10-27 06:01:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25966 to 15245. [2020-10-27 06:01:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15245 states. [2020-10-27 06:01:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15245 states to 15245 states and 20830 transitions. [2020-10-27 06:01:33,044 INFO L78 Accepts]: Start accepts. Automaton has 15245 states and 20830 transitions. Word has length 165 [2020-10-27 06:01:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:33,045 INFO L481 AbstractCegarLoop]: Abstraction has 15245 states and 20830 transitions. [2020-10-27 06:01:33,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:01:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15245 states and 20830 transitions. [2020-10-27 06:01:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 06:01:33,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:33,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:01:33,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash -331567011, now seen corresponding path program 1 times [2020-10-27 06:01:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:33,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171667787] [2020-10-27 06:01:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:33,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:33,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:34,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:38,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:38,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 06:01:38,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:01:38,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 06:01:38,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:01:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 06:01:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:38,582 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:38,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171667787] [2020-10-27 06:01:38,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:38,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:38,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259410986] [2020-10-27 06:01:38,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:38,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:38,662 INFO L87 Difference]: Start difference. First operand 15245 states and 20830 transitions. Second operand 5 states. [2020-10-27 06:01:39,085 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 06:01:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:43,222 INFO L93 Difference]: Finished difference Result 27974 states and 38390 transitions. [2020-10-27 06:01:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:01:43,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-27 06:01:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:43,253 INFO L225 Difference]: With dead ends: 27974 [2020-10-27 06:01:43,254 INFO L226 Difference]: Without dead ends: 15248 [2020-10-27 06:01:43,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:01:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15248 states. [2020-10-27 06:01:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15248 to 15245. [2020-10-27 06:01:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15245 states. [2020-10-27 06:01:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15245 states to 15245 states and 20789 transitions. [2020-10-27 06:01:44,562 INFO L78 Accepts]: Start accepts. Automaton has 15245 states and 20789 transitions. Word has length 165 [2020-10-27 06:01:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:44,563 INFO L481 AbstractCegarLoop]: Abstraction has 15245 states and 20789 transitions. [2020-10-27 06:01:44,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15245 states and 20789 transitions. [2020-10-27 06:01:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 06:01:44,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:44,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:44,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:01:44,575 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1229559596, now seen corresponding path program 1 times [2020-10-27 06:01:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:44,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486817942] [2020-10-27 06:01:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:44,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:49,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 06:01:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:50,087 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:50,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:50,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486817942] [2020-10-27 06:01:50,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:50,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:50,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42468982] [2020-10-27 06:01:50,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:50,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:50,140 INFO L87 Difference]: Start difference. First operand 15245 states and 20789 transitions. Second operand 5 states. [2020-10-27 06:01:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:52,557 INFO L93 Difference]: Finished difference Result 24927 states and 34142 transitions. [2020-10-27 06:01:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:01:52,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-27 06:01:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:52,578 INFO L225 Difference]: With dead ends: 24927 [2020-10-27 06:01:52,578 INFO L226 Difference]: Without dead ends: 12229 [2020-10-27 06:01:52,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:01:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12229 states. [2020-10-27 06:01:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12229 to 12229. [2020-10-27 06:01:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12229 states. [2020-10-27 06:01:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 16623 transitions. [2020-10-27 06:01:53,556 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 16623 transitions. Word has length 166 [2020-10-27 06:01:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:53,557 INFO L481 AbstractCegarLoop]: Abstraction has 12229 states and 16623 transitions. [2020-10-27 06:01:53,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 16623 transitions. [2020-10-27 06:01:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 06:01:53,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:53,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:53,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:01:53,570 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:53,570 INFO L82 PathProgramCache]: Analyzing trace with hash -964699058, now seen corresponding path program 1 times [2020-10-27 06:01:53,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:53,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184916235] [2020-10-27 06:01:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:53,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:53,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:53,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:58,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:58,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 06:01:58,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:01:58,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 06:01:58,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:01:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:01:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 06:01:58,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:59,116 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:01:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:59,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:59,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:59,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:01:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:59,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184916235] [2020-10-27 06:01:59,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:59,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:01:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524646860] [2020-10-27 06:01:59,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:01:59,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:01:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:01:59,197 INFO L87 Difference]: Start difference. First operand 12229 states and 16623 transitions. Second operand 9 states. [2020-10-27 06:01:59,628 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:02:01,891 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:02:02,432 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:04,217 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:04,711 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 06:02:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:06,298 INFO L93 Difference]: Finished difference Result 42777 states and 60564 transitions. [2020-10-27 06:02:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:02:06,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2020-10-27 06:02:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:06,348 INFO L225 Difference]: With dead ends: 42777 [2020-10-27 06:02:06,348 INFO L226 Difference]: Without dead ends: 33052 [2020-10-27 06:02:06,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:02:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33052 states. [2020-10-27 06:02:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33052 to 20417. [2020-10-27 06:02:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20417 states. [2020-10-27 06:02:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20417 states to 20417 states and 27855 transitions. [2020-10-27 06:02:08,243 INFO L78 Accepts]: Start accepts. Automaton has 20417 states and 27855 transitions. Word has length 167 [2020-10-27 06:02:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:02:08,243 INFO L481 AbstractCegarLoop]: Abstraction has 20417 states and 27855 transitions. [2020-10-27 06:02:08,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:02:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20417 states and 27855 transitions. [2020-10-27 06:02:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 06:02:08,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:02:08,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:02:08,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 06:02:08,257 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:02:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:02:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2085761746, now seen corresponding path program 1 times [2020-10-27 06:02:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:02:08,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005948601] [2020-10-27 06:02:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:02:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:08,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:13,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:13,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 06:02:13,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 06:02:13,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:13,728 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:02:13,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:13,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:13,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:13,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:02:13,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:02:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:13,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:02:13,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:13,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005948601] [2020-10-27 06:02:13,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:13,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:02:13,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052965048] [2020-10-27 06:02:13,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:02:13,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:02:13,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:02:13,793 INFO L87 Difference]: Start difference. First operand 20417 states and 27855 transitions. Second operand 5 states. [2020-10-27 06:02:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:16,680 INFO L93 Difference]: Finished difference Result 34031 states and 46322 transitions. [2020-10-27 06:02:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:02:16,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-27 06:02:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:16,696 INFO L225 Difference]: With dead ends: 34031 [2020-10-27 06:02:16,696 INFO L226 Difference]: Without dead ends: 13674 [2020-10-27 06:02:16,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:02:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13674 states. [2020-10-27 06:02:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13674 to 13674. [2020-10-27 06:02:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13674 states. [2020-10-27 06:02:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 18542 transitions. [2020-10-27 06:02:17,894 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 18542 transitions. Word has length 167 [2020-10-27 06:02:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:02:17,894 INFO L481 AbstractCegarLoop]: Abstraction has 13674 states and 18542 transitions. [2020-10-27 06:02:17,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:02:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 18542 transitions. [2020-10-27 06:02:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 06:02:17,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:02:17,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:02:17,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 06:02:17,901 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:02:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:02:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -916494654, now seen corresponding path program 1 times [2020-10-27 06:02:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:02:17,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782671121] [2020-10-27 06:02:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:02:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:17,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:18,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:22,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:22,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 06:02:22,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:23,467 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:02:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:23,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:02:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782671121] [2020-10-27 06:02:23,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:23,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:02:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64291730] [2020-10-27 06:02:23,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:02:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:02:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:02:23,544 INFO L87 Difference]: Start difference. First operand 13674 states and 18542 transitions. Second operand 9 states. [2020-10-27 06:02:24,014 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:02:26,503 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:02:26,964 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:28,804 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:29,289 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 06:02:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:32,182 INFO L93 Difference]: Finished difference Result 52554 states and 73684 transitions. [2020-10-27 06:02:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:02:32,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2020-10-27 06:02:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:32,225 INFO L225 Difference]: With dead ends: 52554 [2020-10-27 06:02:32,225 INFO L226 Difference]: Without dead ends: 40206 [2020-10-27 06:02:32,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:02:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40206 states. [2020-10-27 06:02:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40206 to 18019. [2020-10-27 06:02:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18019 states. [2020-10-27 06:02:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18019 states to 18019 states and 24272 transitions. [2020-10-27 06:02:34,156 INFO L78 Accepts]: Start accepts. Automaton has 18019 states and 24272 transitions. Word has length 171 [2020-10-27 06:02:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:02:34,156 INFO L481 AbstractCegarLoop]: Abstraction has 18019 states and 24272 transitions. [2020-10-27 06:02:34,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:02:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 18019 states and 24272 transitions. [2020-10-27 06:02:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 06:02:34,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:02:34,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:02:34,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 06:02:34,167 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:02:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:02:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -552783275, now seen corresponding path program 1 times [2020-10-27 06:02:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:02:34,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937493181] [2020-10-27 06:02:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:02:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:34,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:35,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:39,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:02:39,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:39,673 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:02:39,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:39,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:02:39,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:39,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:02:39,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:39,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937493181] [2020-10-27 06:02:39,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:39,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:02:39,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595983466] [2020-10-27 06:02:39,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:02:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:39,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:02:39,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:02:39,721 INFO L87 Difference]: Start difference. First operand 18019 states and 24272 transitions. Second operand 5 states. [2020-10-27 06:02:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:42,990 INFO L93 Difference]: Finished difference Result 27076 states and 36557 transitions. [2020-10-27 06:02:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:02:42,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-10-27 06:02:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:43,008 INFO L225 Difference]: With dead ends: 27076 [2020-10-27 06:02:43,008 INFO L226 Difference]: Without dead ends: 15205 [2020-10-27 06:02:43,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:02:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15205 states. [2020-10-27 06:02:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15205 to 15205. [2020-10-27 06:02:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15205 states. [2020-10-27 06:02:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 20416 transitions. [2020-10-27 06:02:44,536 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 20416 transitions. Word has length 171 [2020-10-27 06:02:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:02:44,536 INFO L481 AbstractCegarLoop]: Abstraction has 15205 states and 20416 transitions. [2020-10-27 06:02:44,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:02:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 20416 transitions. [2020-10-27 06:02:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 06:02:44,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:02:44,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:02:44,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 06:02:44,543 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:02:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:02:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 421340754, now seen corresponding path program 1 times [2020-10-27 06:02:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:02:44,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092795897] [2020-10-27 06:02:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:02:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:44,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:44,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:45,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:49,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:49,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-27 06:02:49,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:50,053 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:02:50,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:50,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:50,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:50,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:02:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092795897] [2020-10-27 06:02:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:02:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155375282] [2020-10-27 06:02:50,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:02:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:02:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:02:50,172 INFO L87 Difference]: Start difference. First operand 15205 states and 20416 transitions. Second operand 9 states. [2020-10-27 06:02:50,622 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:02:53,074 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:02:53,524 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:55,449 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 06:02:56,006 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 06:02:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:58,590 INFO L93 Difference]: Finished difference Result 44023 states and 60894 transitions. [2020-10-27 06:02:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:02:58,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2020-10-27 06:02:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:58,645 INFO L225 Difference]: With dead ends: 44023 [2020-10-27 06:02:58,645 INFO L226 Difference]: Without dead ends: 36452 [2020-10-27 06:02:58,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 06:02:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36452 states. [2020-10-27 06:03:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36452 to 20004. [2020-10-27 06:03:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20004 states. [2020-10-27 06:03:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20004 states to 20004 states and 26863 transitions. [2020-10-27 06:03:00,753 INFO L78 Accepts]: Start accepts. Automaton has 20004 states and 26863 transitions. Word has length 174 [2020-10-27 06:03:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:03:00,754 INFO L481 AbstractCegarLoop]: Abstraction has 20004 states and 26863 transitions. [2020-10-27 06:03:00,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:03:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 20004 states and 26863 transitions. [2020-10-27 06:03:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 06:03:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:03:00,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:03:00,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 06:03:00,762 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:03:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:03:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1309660384, now seen corresponding path program 1 times [2020-10-27 06:03:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:03:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538981706] [2020-10-27 06:03:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:03:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:00,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:00,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:00,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 06:03:01,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 06:03:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:02,272 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:03:02,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:03:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:02,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:02,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:03:02,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:03:02,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:03:02,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:03:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:03:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:03:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:03:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538981706] [2020-10-27 06:03:02,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:03:02,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:03:02,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402399619] [2020-10-27 06:03:02,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:03:02,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:03:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:03:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:03:02,327 INFO L87 Difference]: Start difference. First operand 20004 states and 26863 transitions. Second operand 4 states. [2020-10-27 06:03:02,744 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 06:03:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:03:08,106 INFO L93 Difference]: Finished difference Result 45401 states and 63913 transitions. [2020-10-27 06:03:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:03:08,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2020-10-27 06:03:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:03:08,144 INFO L225 Difference]: With dead ends: 45401 [2020-10-27 06:03:08,144 INFO L226 Difference]: Without dead ends: 33870 [2020-10-27 06:03:08,158 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 [2020-10-27 06:03:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33870 states. [2020-10-27 06:03:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33870 to 33867. [2020-10-27 06:03:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33867 states. [2020-10-27 06:03:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33867 states to 33867 states and 46625 transitions. [2020-10-27 06:03:12,066 INFO L78 Accepts]: Start accepts. Automaton has 33867 states and 46625 transitions. Word has length 174 [2020-10-27 06:03:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:03:12,067 INFO L481 AbstractCegarLoop]: Abstraction has 33867 states and 46625 transitions. [2020-10-27 06:03:12,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:03:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33867 states and 46625 transitions. [2020-10-27 06:03:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 06:03:12,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:03:12,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:03:12,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 06:03:12,079 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:03:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:03:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash 528821117, now seen corresponding path program 1 times [2020-10-27 06:03:12,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:03:12,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042067457] [2020-10-27 06:03:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:03:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:12,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:12,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:03:12,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:13,371 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:03:13,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:03:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:13,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:03:13,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:03:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042067457] [2020-10-27 06:03:13,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:03:13,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:03:13,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822909862] [2020-10-27 06:03:13,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:03:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:03:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:03:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:03:13,416 INFO L87 Difference]: Start difference. First operand 33867 states and 46625 transitions. Second operand 4 states. [2020-10-27 06:03:17,210 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 06:03:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:03:19,841 INFO L93 Difference]: Finished difference Result 63440 states and 89549 transitions. [2020-10-27 06:03:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:03:19,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2020-10-27 06:03:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:03:19,883 INFO L225 Difference]: With dead ends: 63440 [2020-10-27 06:03:19,883 INFO L226 Difference]: Without dead ends: 32552 [2020-10-27 06:03:19,902 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 [2020-10-27 06:03:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32552 states. [2020-10-27 06:03:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32552 to 31967. [2020-10-27 06:03:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31967 states. [2020-10-27 06:03:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31967 states to 31967 states and 45203 transitions. [2020-10-27 06:03:23,633 INFO L78 Accepts]: Start accepts. Automaton has 31967 states and 45203 transitions. Word has length 174 [2020-10-27 06:03:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:03:23,633 INFO L481 AbstractCegarLoop]: Abstraction has 31967 states and 45203 transitions. [2020-10-27 06:03:23,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:03:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 31967 states and 45203 transitions. [2020-10-27 06:03:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 06:03:23,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:03:23,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:03:23,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 06:03:23,643 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:03:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:03:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2084881865, now seen corresponding path program 1 times [2020-10-27 06:03:23,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:03:23,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824614845] [2020-10-27 06:03:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:03:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:23,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1370 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:03:25,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:25,454 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 06:03:25,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:03:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:25,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:03:25,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:03:25,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:03:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:03:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:03:25,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824614845] [2020-10-27 06:03:25,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:03:25,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:03:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734898607] [2020-10-27 06:03:25,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:03:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:03:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:03:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:03:25,500 INFO L87 Difference]: Start difference. First operand 31967 states and 45203 transitions. Second operand 4 states. [2020-10-27 06:03:29,685 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 06:03:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:03:34,405 INFO L93 Difference]: Finished difference Result 79570 states and 113632 transitions. [2020-10-27 06:03:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:03:34,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2020-10-27 06:03:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:03:34,462 INFO L225 Difference]: With dead ends: 79570 [2020-10-27 06:03:34,462 INFO L226 Difference]: Without dead ends: 48898 [2020-10-27 06:03:34,483 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 [2020-10-27 06:03:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48898 states. [2020-10-27 06:03:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48898 to 44381. [2020-10-27 06:03:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44381 states. [2020-10-27 06:03:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44381 states to 44381 states and 63857 transitions. [2020-10-27 06:03:40,383 INFO L78 Accepts]: Start accepts. Automaton has 44381 states and 63857 transitions. Word has length 177 [2020-10-27 06:03:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:03:40,384 INFO L481 AbstractCegarLoop]: Abstraction has 44381 states and 63857 transitions. [2020-10-27 06:03:40,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:03:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 44381 states and 63857 transitions. [2020-10-27 06:03:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 06:03:40,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:03:40,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:03:40,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 06:03:40,390 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:03:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:03:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1864723831, now seen corresponding path program 1 times [2020-10-27 06:03:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:03:40,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051937772] [2020-10-27 06:03:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:03:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:03:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:40,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:03:40,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking...