/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:27:57,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:27:57,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:27:57,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:27:57,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:27:57,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:27:57,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:27:57,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:27:57,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:27:57,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:27:57,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:27:57,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:27:57,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:27:57,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:27:57,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:27:57,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:27:57,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:27:57,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:27:57,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:27:57,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:27:57,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:27:57,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:27:57,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:27:57,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:27:57,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:27:57,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:27:57,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:27:57,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:27:57,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:27:57,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:27:57,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:27:57,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:27:57,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:27:57,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:27:57,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:27:57,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:27:57,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:27:57,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:27:57,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:27:57,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:27:57,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:27:57,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:27:57,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:27:57,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:27:57,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:27:57,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:27:57,827 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:27:57,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:27:57,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:27:57,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:27:57,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:27:57,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:27:57,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:27:57,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:27:57,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:27:57,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:27:57,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:27:57,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:27:57,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:27:57,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:27:57,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:27:57,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:27:57,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:27:57,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:27:57,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:27:57,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:27:57,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:27:58,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:27:58,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:27:58,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:27:58,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:27:58,325 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:27:58,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:27:58,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/347cbf097/7b9e3c82786f453aa92c304599a32ed2/FLAGa348a83ab [2020-10-28 18:27:59,105 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:27:59,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:27:59,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/347cbf097/7b9e3c82786f453aa92c304599a32ed2/FLAGa348a83ab [2020-10-28 18:27:59,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/347cbf097/7b9e3c82786f453aa92c304599a32ed2 [2020-10-28 18:27:59,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:27:59,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:27:59,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:27:59,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:27:59,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:27:59,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e918245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59, skipping insertion in model container [2020-10-28 18:27:59,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:27:59,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:27:59,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:27:59,412 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:27:59,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:27:59,483 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:27:59,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59 WrapperNode [2020-10-28 18:27:59,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:27:59,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:27:59,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:27:59,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:27:59,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... [2020-10-28 18:27:59,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:27:59,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:27:59,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:27:59,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:27:59,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:27:59,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:27:59,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:27:59,629 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:27:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:27:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:27:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:27:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:27:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:27:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:27:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:27:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:27:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:27:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:27:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:27:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:27:59,636 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:27:59,636 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:27:59,636 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:27:59,636 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:27:59,636 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:27:59,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:27:59,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:27:59,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:27:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:27:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:27:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:27:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:28:00,464 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:28:00,465 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:28:00,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:00 BoogieIcfgContainer [2020-10-28 18:28:00,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:28:00,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:28:00,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:28:00,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:28:00,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:27:59" (1/3) ... [2020-10-28 18:28:00,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7786a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:00, skipping insertion in model container [2020-10-28 18:28:00,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:27:59" (2/3) ... [2020-10-28 18:28:00,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7786a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:00, skipping insertion in model container [2020-10-28 18:28:00,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:00" (3/3) ... [2020-10-28 18:28:00,484 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:28:00,498 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:28:00,507 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:28:00,522 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:28:00,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:28:00,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:28:00,569 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:28:00,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:28:00,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:28:00,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:28:00,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:28:00,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:28:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-28 18:28:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 18:28:00,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:00,601 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] [2020-10-28 18:28:00,601 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash -423992621, now seen corresponding path program 1 times [2020-10-28 18:28:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864923023] [2020-10-28 18:28:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:03,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 18:28:03,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:03,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2461 [2020-10-28 18:28:03,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:03,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:28:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:28:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:28:03,578 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:03,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:03,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:03,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:03,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:28:03,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:03,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:03,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:03,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:03,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:03,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:03,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864923023] [2020-10-28 18:28:03,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:03,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:03,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851723213] [2020-10-28 18:28:03,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:03,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:03,676 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2020-10-28 18:28:03,926 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:28:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:04,385 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2020-10-28 18:28:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:04,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 18:28:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:04,397 INFO L225 Difference]: With dead ends: 153 [2020-10-28 18:28:04,398 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 18:28:04,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 18:28:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-28 18:28:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 18:28:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 135 transitions. [2020-10-28 18:28:04,467 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 135 transitions. Word has length 41 [2020-10-28 18:28:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:04,468 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 135 transitions. [2020-10-28 18:28:04,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 135 transitions. [2020-10-28 18:28:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 18:28:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:04,472 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] [2020-10-28 18:28:04,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:28:04,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash -991625223, now seen corresponding path program 1 times [2020-10-28 18:28:04,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:04,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857756055] [2020-10-28 18:28:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:07,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 18:28:07,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-28 18:28:07,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:07,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:28:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:28:07,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:07,289 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:07,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:28:07,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:07,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:07,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857756055] [2020-10-28 18:28:07,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:07,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095990018] [2020-10-28 18:28:07,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:07,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:07,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:07,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:07,323 INFO L87 Difference]: Start difference. First operand 94 states and 135 transitions. Second operand 4 states. [2020-10-28 18:28:07,473 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:28:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:07,773 INFO L93 Difference]: Finished difference Result 220 states and 333 transitions. [2020-10-28 18:28:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:07,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 18:28:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:07,776 INFO L225 Difference]: With dead ends: 220 [2020-10-28 18:28:07,776 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 18:28:07,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 18:28:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-28 18:28:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 18:28:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 217 transitions. [2020-10-28 18:28:07,801 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 217 transitions. Word has length 42 [2020-10-28 18:28:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:07,802 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 217 transitions. [2020-10-28 18:28:07,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 217 transitions. [2020-10-28 18:28:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 18:28:07,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:07,803 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] [2020-10-28 18:28:07,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:28:07,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1211960673, now seen corresponding path program 1 times [2020-10-28 18:28:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:07,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677928153] [2020-10-28 18:28:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:07,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:09,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:09,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 18:28:09,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:28:09,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-28 18:28:09,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:09,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:28:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:28:09,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:09,431 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:09,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:09,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:09,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:09,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:28:09,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:09,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:09,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677928153] [2020-10-28 18:28:09,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:09,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:09,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375300645] [2020-10-28 18:28:09,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:09,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:09,469 INFO L87 Difference]: Start difference. First operand 146 states and 217 transitions. Second operand 4 states. [2020-10-28 18:28:09,619 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:28:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:09,917 INFO L93 Difference]: Finished difference Result 360 states and 553 transitions. [2020-10-28 18:28:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:09,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 18:28:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:09,920 INFO L225 Difference]: With dead ends: 360 [2020-10-28 18:28:09,921 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 18:28:09,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 18:28:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-10-28 18:28:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 18:28:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2020-10-28 18:28:09,951 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 43 [2020-10-28 18:28:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:09,951 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2020-10-28 18:28:09,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2020-10-28 18:28:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:28:09,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:09,958 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] [2020-10-28 18:28:09,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:28:09,959 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:09,959 INFO L82 PathProgramCache]: Analyzing trace with hash 724612549, now seen corresponding path program 1 times [2020-10-28 18:28:09,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:09,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384492803] [2020-10-28 18:28:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:10,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:13,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:13,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:28:13,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:13,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-10-28 18:28:13,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:13,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:28:13,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:28:13,664 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:13,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:13,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:13,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:13,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:28:13,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:13,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:13,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384492803] [2020-10-28 18:28:13,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:13,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:13,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430482904] [2020-10-28 18:28:13,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:13,732 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand 6 states. [2020-10-28 18:28:13,925 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:14,324 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:14,386 INFO L93 Difference]: Finished difference Result 652 states and 1005 transitions. [2020-10-28 18:28:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:28:14,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 18:28:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:14,390 INFO L225 Difference]: With dead ends: 652 [2020-10-28 18:28:14,390 INFO L226 Difference]: Without dead ends: 441 [2020-10-28 18:28:14,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-28 18:28:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2020-10-28 18:28:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-28 18:28:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 669 transitions. [2020-10-28 18:28:14,451 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 669 transitions. Word has length 44 [2020-10-28 18:28:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:14,453 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 669 transitions. [2020-10-28 18:28:14,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 669 transitions. [2020-10-28 18:28:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:28:14,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:14,464 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] [2020-10-28 18:28:14,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:28:14,466 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1559815040, now seen corresponding path program 1 times [2020-10-28 18:28:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:14,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482705785] [2020-10-28 18:28:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:15,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:28:15,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:28:15,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-28 18:28:15,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:15,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:28:15,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:15,502 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:15,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:15,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:15,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:15,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:15,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482705785] [2020-10-28 18:28:15,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:28:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906963870] [2020-10-28 18:28:15,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:15,541 INFO L87 Difference]: Start difference. First operand 438 states and 669 transitions. Second operand 6 states. [2020-10-28 18:28:15,749 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:28:16,225 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:16,391 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:28:16,604 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:28:16,763 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:28:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:16,931 INFO L93 Difference]: Finished difference Result 2928 states and 4545 transitions. [2020-10-28 18:28:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:16,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 18:28:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:16,952 INFO L225 Difference]: With dead ends: 2928 [2020-10-28 18:28:16,953 INFO L226 Difference]: Without dead ends: 2513 [2020-10-28 18:28:16,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:28:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2020-10-28 18:28:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 850. [2020-10-28 18:28:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-28 18:28:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1281 transitions. [2020-10-28 18:28:17,070 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1281 transitions. Word has length 44 [2020-10-28 18:28:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:17,072 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 1281 transitions. [2020-10-28 18:28:17,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1281 transitions. [2020-10-28 18:28:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:28:17,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:17,076 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] [2020-10-28 18:28:17,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:28:17,076 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1262547610, now seen corresponding path program 1 times [2020-10-28 18:28:17,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:17,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410748452] [2020-10-28 18:28:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:28:17,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:28:17,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-28 18:28:17,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:28:17,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,949 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:17,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:17,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410748452] [2020-10-28 18:28:17,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:17,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:28:17,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819751747] [2020-10-28 18:28:17,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:17,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:17,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:17,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:17,987 INFO L87 Difference]: Start difference. First operand 850 states and 1281 transitions. Second operand 6 states. [2020-10-28 18:28:18,221 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:28:18,668 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:28:18,842 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:28:19,081 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:28:19,271 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:28:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:19,484 INFO L93 Difference]: Finished difference Result 3340 states and 5061 transitions. [2020-10-28 18:28:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:19,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 18:28:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:19,499 INFO L225 Difference]: With dead ends: 3340 [2020-10-28 18:28:19,499 INFO L226 Difference]: Without dead ends: 2513 [2020-10-28 18:28:19,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:28:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2020-10-28 18:28:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 850. [2020-10-28 18:28:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-28 18:28:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1265 transitions. [2020-10-28 18:28:19,623 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1265 transitions. Word has length 46 [2020-10-28 18:28:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:19,624 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 1265 transitions. [2020-10-28 18:28:19,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1265 transitions. [2020-10-28 18:28:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:28:19,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:19,625 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] [2020-10-28 18:28:19,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:28:19,625 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1884077243, now seen corresponding path program 1 times [2020-10-28 18:28:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:19,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778393536] [2020-10-28 18:28:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:28:20,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:20,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:28:20,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:20,444 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:20,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:20,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:20,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:20,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:28:20,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:20,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 28 [2020-10-28 18:28:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:20,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778393536] [2020-10-28 18:28:20,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:20,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:20,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308041337] [2020-10-28 18:28:20,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:20,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:20,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:20,502 INFO L87 Difference]: Start difference. First operand 850 states and 1265 transitions. Second operand 4 states. [2020-10-28 18:28:20,650 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:21,012 INFO L93 Difference]: Finished difference Result 2070 states and 3091 transitions. [2020-10-28 18:28:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:21,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 18:28:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:21,020 INFO L225 Difference]: With dead ends: 2070 [2020-10-28 18:28:21,021 INFO L226 Difference]: Without dead ends: 1243 [2020-10-28 18:28:21,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2020-10-28 18:28:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1240. [2020-10-28 18:28:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-28 18:28:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1823 transitions. [2020-10-28 18:28:21,147 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1823 transitions. Word has length 46 [2020-10-28 18:28:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:21,148 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1823 transitions. [2020-10-28 18:28:21,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1823 transitions. [2020-10-28 18:28:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:28:21,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:21,149 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] [2020-10-28 18:28:21,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:28:21,150 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash -543572843, now seen corresponding path program 1 times [2020-10-28 18:28:21,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:21,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915382907] [2020-10-28 18:28:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:21,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:21,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:28:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:21,690 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:21,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:21,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:21,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915382907] [2020-10-28 18:28:21,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:21,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593329294] [2020-10-28 18:28:21,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:21,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:21,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:21,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:21,735 INFO L87 Difference]: Start difference. First operand 1240 states and 1823 transitions. Second operand 6 states. [2020-10-28 18:28:21,932 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:28:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:22,298 INFO L93 Difference]: Finished difference Result 2455 states and 3621 transitions. [2020-10-28 18:28:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:28:22,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 18:28:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:22,305 INFO L225 Difference]: With dead ends: 2455 [2020-10-28 18:28:22,306 INFO L226 Difference]: Without dead ends: 1240 [2020-10-28 18:28:22,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-10-28 18:28:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2020-10-28 18:28:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-28 18:28:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1791 transitions. [2020-10-28 18:28:22,444 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1791 transitions. Word has length 47 [2020-10-28 18:28:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:22,444 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1791 transitions. [2020-10-28 18:28:22,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1791 transitions. [2020-10-28 18:28:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:28:22,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:22,445 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] [2020-10-28 18:28:22,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:28:22,446 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash -867895622, now seen corresponding path program 1 times [2020-10-28 18:28:22,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:22,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095673813] [2020-10-28 18:28:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:22,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:22,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:28:22,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:22,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 18:28:22,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:22,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:28:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:28:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:28:22,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:22,817 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:22,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:22,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:22,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:22,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095673813] [2020-10-28 18:28:22,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:22,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453323148] [2020-10-28 18:28:22,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:28:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:28:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:22,846 INFO L87 Difference]: Start difference. First operand 1240 states and 1791 transitions. Second operand 5 states. [2020-10-28 18:28:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:23,402 INFO L93 Difference]: Finished difference Result 2226 states and 3202 transitions. [2020-10-28 18:28:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:28:23,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 18:28:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:23,414 INFO L225 Difference]: With dead ends: 2226 [2020-10-28 18:28:23,414 INFO L226 Difference]: Without dead ends: 2223 [2020-10-28 18:28:23,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2020-10-28 18:28:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1304. [2020-10-28 18:28:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2020-10-28 18:28:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1847 transitions. [2020-10-28 18:28:23,576 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1847 transitions. Word has length 47 [2020-10-28 18:28:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:23,577 INFO L481 AbstractCegarLoop]: Abstraction has 1304 states and 1847 transitions. [2020-10-28 18:28:23,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:28:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1847 transitions. [2020-10-28 18:28:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:28:23,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:23,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:23,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:28:23,580 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1244027673, now seen corresponding path program 1 times [2020-10-28 18:28:23,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:23,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036543833] [2020-10-28 18:28:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:28,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:28,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:28:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:28,835 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:28,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:28,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:28,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:28,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:28,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:28:28,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:28,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:28,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:28:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036543833] [2020-10-28 18:28:28,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:28,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:28:28,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442512826] [2020-10-28 18:28:28,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:28,871 INFO L87 Difference]: Start difference. First operand 1304 states and 1847 transitions. Second operand 6 states. [2020-10-28 18:28:29,065 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:29,549 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:29,747 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-28 18:28:29,911 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:28:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:30,393 INFO L93 Difference]: Finished difference Result 5647 states and 8073 transitions. [2020-10-28 18:28:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:28:30,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:28:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:30,414 INFO L225 Difference]: With dead ends: 5647 [2020-10-28 18:28:30,414 INFO L226 Difference]: Without dead ends: 4368 [2020-10-28 18:28:30,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:28:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2020-10-28 18:28:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 3102. [2020-10-28 18:28:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2020-10-28 18:28:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4377 transitions. [2020-10-28 18:28:30,754 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4377 transitions. Word has length 65 [2020-10-28 18:28:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:30,755 INFO L481 AbstractCegarLoop]: Abstraction has 3102 states and 4377 transitions. [2020-10-28 18:28:30,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4377 transitions. [2020-10-28 18:28:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:28:30,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:30,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:30,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:28:30,757 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash -507925791, now seen corresponding path program 1 times [2020-10-28 18:28:30,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:30,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831657437] [2020-10-28 18:28:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:30,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:30,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:30,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:35,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:35,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:28:35,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:28:35,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:28:35,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:35,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:35,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:35,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:28:35,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 18:28:36,024 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:36,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:36,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:36,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:36,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:28:36,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:36,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:36,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:36,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:28:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831657437] [2020-10-28 18:28:36,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:36,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:28:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396377861] [2020-10-28 18:28:36,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:36,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:36,072 INFO L87 Difference]: Start difference. First operand 3102 states and 4377 transitions. Second operand 6 states. [2020-10-28 18:28:36,325 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:36,814 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:36,977 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-28 18:28:37,146 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:28:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:37,839 INFO L93 Difference]: Finished difference Result 8210 states and 11578 transitions. [2020-10-28 18:28:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:28:37,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:28:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:37,872 INFO L225 Difference]: With dead ends: 8210 [2020-10-28 18:28:37,872 INFO L226 Difference]: Without dead ends: 6409 [2020-10-28 18:28:37,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:28:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2020-10-28 18:28:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 5020. [2020-10-28 18:28:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5020 states. [2020-10-28 18:28:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 7051 transitions. [2020-10-28 18:28:38,486 INFO L78 Accepts]: Start accepts. Automaton has 5020 states and 7051 transitions. Word has length 65 [2020-10-28 18:28:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:38,486 INFO L481 AbstractCegarLoop]: Abstraction has 5020 states and 7051 transitions. [2020-10-28 18:28:38,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5020 states and 7051 transitions. [2020-10-28 18:28:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:28:38,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:38,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:38,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:28:38,489 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash 92571501, now seen corresponding path program 1 times [2020-10-28 18:28:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:38,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509855757] [2020-10-28 18:28:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:38,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:43,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:28:43,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:43,735 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:43,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:43,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:43,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:43,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509855757] [2020-10-28 18:28:43,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:43,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:28:43,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932725271] [2020-10-28 18:28:43,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:43,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:43,800 INFO L87 Difference]: Start difference. First operand 5020 states and 7051 transitions. Second operand 6 states. [2020-10-28 18:28:44,083 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:44,661 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:44,811 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-28 18:28:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:45,269 INFO L93 Difference]: Finished difference Result 7876 states and 11158 transitions. [2020-10-28 18:28:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:28:45,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:28:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:45,304 INFO L225 Difference]: With dead ends: 7876 [2020-10-28 18:28:45,304 INFO L226 Difference]: Without dead ends: 6637 [2020-10-28 18:28:45,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:28:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2020-10-28 18:28:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 6352. [2020-10-28 18:28:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6352 states. [2020-10-28 18:28:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6352 states to 6352 states and 9007 transitions. [2020-10-28 18:28:46,045 INFO L78 Accepts]: Start accepts. Automaton has 6352 states and 9007 transitions. Word has length 65 [2020-10-28 18:28:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:46,046 INFO L481 AbstractCegarLoop]: Abstraction has 6352 states and 9007 transitions. [2020-10-28 18:28:46,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6352 states and 9007 transitions. [2020-10-28 18:28:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:28:46,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:46,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:46,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:28:46,054 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1100054169, now seen corresponding path program 1 times [2020-10-28 18:28:46,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:46,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261219808] [2020-10-28 18:28:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:51,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:28:51,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:28:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:51,313 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:51,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:51,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:51,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:28:51,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:51,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:51,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 18:28:51,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261219808] [2020-10-28 18:28:51,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:51,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 18:28:51,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160788805] [2020-10-28 18:28:51,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:28:51,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:28:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:51,374 INFO L87 Difference]: Start difference. First operand 6352 states and 9007 transitions. Second operand 5 states. [2020-10-28 18:28:51,574 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:28:52,099 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:28:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:52,925 INFO L93 Difference]: Finished difference Result 14577 states and 20821 transitions. [2020-10-28 18:28:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:28:52,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-28 18:28:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:52,954 INFO L225 Difference]: With dead ends: 14577 [2020-10-28 18:28:52,954 INFO L226 Difference]: Without dead ends: 9786 [2020-10-28 18:28:52,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:28:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9786 states. [2020-10-28 18:28:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9786 to 9780. [2020-10-28 18:28:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9780 states. [2020-10-28 18:28:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 13723 transitions. [2020-10-28 18:28:53,948 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 13723 transitions. Word has length 66 [2020-10-28 18:28:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:53,948 INFO L481 AbstractCegarLoop]: Abstraction has 9780 states and 13723 transitions. [2020-10-28 18:28:53,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:28:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 13723 transitions. [2020-10-28 18:28:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:28:53,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:53,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:53,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:28:53,951 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:53,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1092450070, now seen corresponding path program 1 times [2020-10-28 18:28:53,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:53,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464787296] [2020-10-28 18:28:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:59,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:28:59,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:28:59,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 18:28:59,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:59,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:28:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:28:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:59,524 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:28:59,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:59,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:59,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:59,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464787296] [2020-10-28 18:28:59,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:59,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:28:59,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945987471] [2020-10-28 18:28:59,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:28:59,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:59,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:28:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:28:59,597 INFO L87 Difference]: Start difference. First operand 9780 states and 13723 transitions. Second operand 13 states. [2020-10-28 18:29:00,207 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 143 [2020-10-28 18:29:00,418 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-28 18:29:01,009 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 18:29:01,154 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 18:29:01,275 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-28 18:29:01,443 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 18:29:02,798 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 18:29:02,929 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 18:29:03,321 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 18:29:03,990 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 143 [2020-10-28 18:29:04,436 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 137 [2020-10-28 18:29:04,952 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 137 [2020-10-28 18:29:05,094 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 18:29:05,231 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 18:29:05,384 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 18:29:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:10,062 INFO L93 Difference]: Finished difference Result 31088 states and 43024 transitions. [2020-10-28 18:29:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 18:29:10,063 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 18:29:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:10,137 INFO L225 Difference]: With dead ends: 31088 [2020-10-28 18:29:10,138 INFO L226 Difference]: Without dead ends: 27059 [2020-10-28 18:29:10,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=877, Invalid=3413, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 18:29:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27059 states. [2020-10-28 18:29:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27059 to 16327. [2020-10-28 18:29:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16327 states. [2020-10-28 18:29:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16327 states to 16327 states and 22892 transitions. [2020-10-28 18:29:12,250 INFO L78 Accepts]: Start accepts. Automaton has 16327 states and 22892 transitions. Word has length 67 [2020-10-28 18:29:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:12,250 INFO L481 AbstractCegarLoop]: Abstraction has 16327 states and 22892 transitions. [2020-10-28 18:29:12,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:29:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16327 states and 22892 transitions. [2020-10-28 18:29:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:29:12,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:12,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:12,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:29:12,253 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1484067085, now seen corresponding path program 1 times [2020-10-28 18:29:12,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:12,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303679949] [2020-10-28 18:29:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:29:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:29:17,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:17,811 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:29:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:17,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:17,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303679949] [2020-10-28 18:29:17,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:29:17,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 18:29:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803322611] [2020-10-28 18:29:17,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:29:17,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:29:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:29:17,870 INFO L87 Difference]: Start difference. First operand 16327 states and 22892 transitions. Second operand 11 states. [2020-10-28 18:29:18,144 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:29:19,585 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:29:19,810 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:29:20,026 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:21,963 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:29:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:33,812 INFO L93 Difference]: Finished difference Result 117251 states and 161612 transitions. [2020-10-28 18:29:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 18:29:33,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 18:29:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:34,139 INFO L225 Difference]: With dead ends: 117251 [2020-10-28 18:29:34,139 INFO L226 Difference]: Without dead ends: 100949 [2020-10-28 18:29:34,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 18:29:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100949 states. [2020-10-28 18:29:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100949 to 40178. [2020-10-28 18:29:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40178 states. [2020-10-28 18:29:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40178 states to 40178 states and 55572 transitions. [2020-10-28 18:29:41,000 INFO L78 Accepts]: Start accepts. Automaton has 40178 states and 55572 transitions. Word has length 67 [2020-10-28 18:29:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:41,000 INFO L481 AbstractCegarLoop]: Abstraction has 40178 states and 55572 transitions. [2020-10-28 18:29:41,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:29:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 40178 states and 55572 transitions. [2020-10-28 18:29:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:29:41,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:41,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:41,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:29:41,004 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1369034780, now seen corresponding path program 1 times [2020-10-28 18:29:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:41,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574409373] [2020-10-28 18:29:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:29:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:29:46,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:46,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:29:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:29:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:46,364 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:29:46,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:46,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:46,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574409373] [2020-10-28 18:29:46,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:29:46,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 18:29:46,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990098500] [2020-10-28 18:29:46,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:29:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:29:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:29:46,414 INFO L87 Difference]: Start difference. First operand 40178 states and 55572 transitions. Second operand 11 states. [2020-10-28 18:29:46,683 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:29:49,046 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:49,266 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:29:49,492 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:30:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:16,230 INFO L93 Difference]: Finished difference Result 219522 states and 299270 transitions. [2020-10-28 18:30:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 18:30:16,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 18:30:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:16,680 INFO L225 Difference]: With dead ends: 219522 [2020-10-28 18:30:16,680 INFO L226 Difference]: Without dead ends: 179369 [2020-10-28 18:30:16,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 18:30:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179369 states. [2020-10-28 18:30:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179369 to 90970. [2020-10-28 18:30:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90970 states. [2020-10-28 18:30:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90970 states to 90970 states and 124796 transitions. [2020-10-28 18:30:31,700 INFO L78 Accepts]: Start accepts. Automaton has 90970 states and 124796 transitions. Word has length 67 [2020-10-28 18:30:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:31,700 INFO L481 AbstractCegarLoop]: Abstraction has 90970 states and 124796 transitions. [2020-10-28 18:30:31,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:30:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 90970 states and 124796 transitions. [2020-10-28 18:30:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:30:31,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:31,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:31,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:30:31,703 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:31,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1605515426, now seen corresponding path program 1 times [2020-10-28 18:30:31,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:31,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002169782] [2020-10-28 18:30:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:31,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:32,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3504 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:30:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 18:30:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:35,394 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:30:35,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:35,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 18:30:35,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002169782] [2020-10-28 18:30:35,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:35,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255893744] [2020-10-28 18:30:35,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:35,416 INFO L87 Difference]: Start difference. First operand 90970 states and 124796 transitions. Second operand 4 states. [2020-10-28 18:30:36,018 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:30:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:46,781 INFO L93 Difference]: Finished difference Result 163330 states and 224532 transitions. [2020-10-28 18:30:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:46,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:30:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:46,868 INFO L225 Difference]: With dead ends: 163330 [2020-10-28 18:30:46,868 INFO L226 Difference]: Without dead ends: 72385 [2020-10-28 18:30:46,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72385 states. [2020-10-28 18:30:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72385 to 72385. [2020-10-28 18:30:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72385 states. [2020-10-28 18:30:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72385 states to 72385 states and 98192 transitions. [2020-10-28 18:30:57,742 INFO L78 Accepts]: Start accepts. Automaton has 72385 states and 98192 transitions. Word has length 68 [2020-10-28 18:30:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:57,742 INFO L481 AbstractCegarLoop]: Abstraction has 72385 states and 98192 transitions. [2020-10-28 18:30:57,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 72385 states and 98192 transitions. [2020-10-28 18:30:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:30:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:57,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:57,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:30:57,745 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -68947708, now seen corresponding path program 1 times [2020-10-28 18:30:57,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:57,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862017926] [2020-10-28 18:30:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:57,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:58,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3711 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:31:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:01,636 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:31:01,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:01,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:01,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:31:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862017926] [2020-10-28 18:31:01,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:01,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:01,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433089158] [2020-10-28 18:31:01,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:01,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:01,659 INFO L87 Difference]: Start difference. First operand 72385 states and 98192 transitions. Second operand 4 states. [2020-10-28 18:31:02,178 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:31:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:11,373 INFO L93 Difference]: Finished difference Result 140140 states and 190417 transitions. [2020-10-28 18:31:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:11,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:31:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:11,472 INFO L225 Difference]: With dead ends: 140140 [2020-10-28 18:31:11,473 INFO L226 Difference]: Without dead ends: 67780 [2020-10-28 18:31:11,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67780 states. [2020-10-28 18:31:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67780 to 67780. [2020-10-28 18:31:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67780 states. [2020-10-28 18:31:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67780 states to 67780 states and 91390 transitions. [2020-10-28 18:31:21,358 INFO L78 Accepts]: Start accepts. Automaton has 67780 states and 91390 transitions. Word has length 68 [2020-10-28 18:31:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:21,358 INFO L481 AbstractCegarLoop]: Abstraction has 67780 states and 91390 transitions. [2020-10-28 18:31:21,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 67780 states and 91390 transitions. [2020-10-28 18:31:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:31:21,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:21,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:21,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:31:21,361 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1451491360, now seen corresponding path program 1 times [2020-10-28 18:31:21,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:21,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416433685] [2020-10-28 18:31:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:22,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:24,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:24,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:31:24,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:31:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-28 18:31:24,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:24,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:31:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:31:24,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:24,510 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:31:24,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:24,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:24,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416433685] [2020-10-28 18:31:24,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:24,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:24,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179783515] [2020-10-28 18:31:24,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:24,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:24,543 INFO L87 Difference]: Start difference. First operand 67780 states and 91390 transitions. Second operand 4 states. [2020-10-28 18:31:25,808 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:31:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:34,744 INFO L93 Difference]: Finished difference Result 135538 states and 182757 transitions. [2020-10-28 18:31:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:34,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:31:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:34,827 INFO L225 Difference]: With dead ends: 135538 [2020-10-28 18:31:34,827 INFO L226 Difference]: Without dead ends: 67783 [2020-10-28 18:31:34,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67783 states.