/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:22:06,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:22:06,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:22:06,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:22:06,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:22:06,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:22:06,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:22:06,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:22:06,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:22:06,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:22:06,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:22:06,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:22:06,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:22:06,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:22:06,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:22:06,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:22:06,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:22:06,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:22:06,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:22:06,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:22:06,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:22:06,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:22:06,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:22:06,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:22:06,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:22:06,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:22:06,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:22:06,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:22:06,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:22:06,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:22:06,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:22:06,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:22:06,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:22:06,821 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:22:06,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:22:06,822 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:22:06,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:22:06,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:22:06,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:22:06,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:22:06,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:22:06,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:22:06,825 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:22:06,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:22:06,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:22:06,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:22:06,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:22:06,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:22:06,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:22:06,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:22:06,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:22:06,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:22:06,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:22:06,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:22:06,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:22:06,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:22:06,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:22:06,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:22:06,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:22:07,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:22:07,209 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:22:07,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:22:07,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:22:07,216 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:22:07,218 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:07,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebbc09ab/3635eecc05654b13a3588bd563eb5da5/FLAG283db3927 [2020-07-17 12:22:08,090 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:22:08,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:08,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebbc09ab/3635eecc05654b13a3588bd563eb5da5/FLAG283db3927 [2020-07-17 12:22:08,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebbc09ab/3635eecc05654b13a3588bd563eb5da5 [2020-07-17 12:22:08,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:22:08,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:22:08,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:22:08,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:22:08,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:22:08,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:22:08" (1/1) ... [2020-07-17 12:22:08,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d144c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:08, skipping insertion in model container [2020-07-17 12:22:08,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:22:08" (1/1) ... [2020-07-17 12:22:08,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:22:08,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:22:09,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:22:09,640 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:22:10,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:22:10,424 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:22:10,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10 WrapperNode [2020-07-17 12:22:10,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:22:10,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:22:10,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:22:10,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:22:10,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... [2020-07-17 12:22:10,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:22:10,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:22:10,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:22:10,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:22:10,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 12:22:10,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:22:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:22:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:22:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:22:10,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:22:10,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 12:22:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-17 12:22:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:22:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-17 12:22:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:22:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:22:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-17 12:22:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-17 12:22:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-17 12:22:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-17 12:22:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-17 12:22:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-17 12:22:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 12:22:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 12:22:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:22:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:22:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:22:13,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:22:13,864 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:22:13,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:22:13 BoogieIcfgContainer [2020-07-17 12:22:13,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:22:13,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:22:13,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:22:13,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:22:13,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:22:08" (1/3) ... [2020-07-17 12:22:13,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2147c2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:22:13, skipping insertion in model container [2020-07-17 12:22:13,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:10" (2/3) ... [2020-07-17 12:22:13,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2147c2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:22:13, skipping insertion in model container [2020-07-17 12:22:13,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:22:13" (3/3) ... [2020-07-17 12:22:13,888 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:13,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:22:13,917 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:22:13,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:22:13,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:22:13,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:22:13,983 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:22:13,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:22:13,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:22:13,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:22:13,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:22:13,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:22:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-17 12:22:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 12:22:14,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:14,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:14,109 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-17 12:22:14,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:14,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38078955] [2020-07-17 12:22:14,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:16,252 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:16,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38078955] [2020-07-17 12:22:16,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:16,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:16,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267457919] [2020-07-17 12:22:16,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:16,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:16,496 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-07-17 12:22:17,027 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:22:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:22,789 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-07-17 12:22:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:22,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-17 12:22:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:22,843 INFO L225 Difference]: With dead ends: 1515 [2020-07-17 12:22:22,844 INFO L226 Difference]: Without dead ends: 1299 [2020-07-17 12:22:22,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-07-17 12:22:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-07-17 12:22:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-07-17 12:22:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-07-17 12:22:23,048 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-07-17 12:22:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:23,055 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-07-17 12:22:23,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-07-17 12:22:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 12:22:23,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:23,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:23,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:22:23,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-07-17 12:22:23,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:23,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751155256] [2020-07-17 12:22:23,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:24,227 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751155256] [2020-07-17 12:22:24,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:24,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:24,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668152987] [2020-07-17 12:22:24,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:24,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:24,512 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-07-17 12:22:25,165 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:22:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:30,079 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-07-17 12:22:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:30,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-17 12:22:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:30,102 INFO L225 Difference]: With dead ends: 2671 [2020-07-17 12:22:30,103 INFO L226 Difference]: Without dead ends: 2289 [2020-07-17 12:22:30,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-07-17 12:22:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-07-17 12:22:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-07-17 12:22:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-07-17 12:22:30,242 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-07-17 12:22:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:30,243 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-07-17 12:22:30,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-07-17 12:22:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 12:22:30,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:30,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:30,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:22:30,260 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-07-17 12:22:30,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:30,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925257857] [2020-07-17 12:22:30,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:31,316 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:31,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925257857] [2020-07-17 12:22:31,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:31,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:31,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203002428] [2020-07-17 12:22:31,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:31,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:31,544 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-07-17 12:22:32,052 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:22:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:36,532 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-07-17 12:22:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:36,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-17 12:22:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:36,558 INFO L225 Difference]: With dead ends: 4943 [2020-07-17 12:22:36,559 INFO L226 Difference]: Without dead ends: 4229 [2020-07-17 12:22:36,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-07-17 12:22:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-07-17 12:22:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-07-17 12:22:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-07-17 12:22:36,716 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-07-17 12:22:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:36,716 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-07-17 12:22:36,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-07-17 12:22:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 12:22:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:36,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:36,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:22:36,729 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-07-17 12:22:36,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:36,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902652176] [2020-07-17 12:22:36,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:37,641 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:37,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902652176] [2020-07-17 12:22:37,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:37,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:37,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143035836] [2020-07-17 12:22:37,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:37,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:37,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:37,785 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-07-17 12:22:38,211 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:22:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:42,592 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-07-17 12:22:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:42,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-17 12:22:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:42,631 INFO L225 Difference]: With dead ends: 9359 [2020-07-17 12:22:42,631 INFO L226 Difference]: Without dead ends: 8029 [2020-07-17 12:22:42,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-07-17 12:22:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-07-17 12:22:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-07-17 12:22:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-07-17 12:22:42,890 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-07-17 12:22:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:42,891 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-07-17 12:22:42,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-07-17 12:22:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 12:22:42,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:42,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:42,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:22:42,920 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-07-17 12:22:42,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:42,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508555847] [2020-07-17 12:22:42,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:44,036 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:44,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508555847] [2020-07-17 12:22:44,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:44,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:22:44,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766531000] [2020-07-17 12:22:44,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:22:44,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:22:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:44,162 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-07-17 12:22:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:51,879 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-07-17 12:22:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:51,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-07-17 12:22:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:51,948 INFO L225 Difference]: With dead ends: 23754 [2020-07-17 12:22:51,949 INFO L226 Difference]: Without dead ends: 15742 [2020-07-17 12:22:51,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:22:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-07-17 12:22:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-07-17 12:22:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-07-17 12:22:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-07-17 12:22:52,744 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-07-17 12:22:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:52,745 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-07-17 12:22:52,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:22:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-07-17 12:22:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-17 12:22:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:52,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:22:52,782 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-07-17 12:22:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:52,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579999472] [2020-07-17 12:22:52,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:53,427 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:53,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579999472] [2020-07-17 12:22:53,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:53,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:53,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546110009] [2020-07-17 12:22:53,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:53,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:53,559 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-07-17 12:23:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:02,790 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-07-17 12:23:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:02,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-17 12:23:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:02,875 INFO L225 Difference]: With dead ends: 46481 [2020-07-17 12:23:02,876 INFO L226 Difference]: Without dead ends: 30870 [2020-07-17 12:23:02,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-07-17 12:23:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-07-17 12:23:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-07-17 12:23:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-07-17 12:23:05,017 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-07-17 12:23:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:05,018 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-07-17 12:23:05,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-07-17 12:23:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-17 12:23:05,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:05,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:05,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:23:05,084 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-07-17 12:23:05,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:05,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060307624] [2020-07-17 12:23:05,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:05,631 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:05,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060307624] [2020-07-17 12:23:05,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:05,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:05,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718477830] [2020-07-17 12:23:05,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:05,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:05,729 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states. [2020-07-17 12:23:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:15,805 INFO L93 Difference]: Finished difference Result 92529 states and 141731 transitions. [2020-07-17 12:23:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:15,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-17 12:23:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:16,005 INFO L225 Difference]: With dead ends: 92529 [2020-07-17 12:23:16,006 INFO L226 Difference]: Without dead ends: 61703 [2020-07-17 12:23:16,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61703 states. [2020-07-17 12:23:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61703 to 30887. [2020-07-17 12:23:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30887 states. [2020-07-17 12:23:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30887 states to 30887 states and 47313 transitions. [2020-07-17 12:23:17,361 INFO L78 Accepts]: Start accepts. Automaton has 30887 states and 47313 transitions. Word has length 320 [2020-07-17 12:23:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:17,361 INFO L479 AbstractCegarLoop]: Abstraction has 30887 states and 47313 transitions. [2020-07-17 12:23:17,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30887 states and 47313 transitions. [2020-07-17 12:23:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-17 12:23:17,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:17,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:17,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:23:17,403 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:17,404 INFO L82 PathProgramCache]: Analyzing trace with hash -83680004, now seen corresponding path program 1 times [2020-07-17 12:23:17,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:17,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495392953] [2020-07-17 12:23:17,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:17,954 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:18,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495392953] [2020-07-17 12:23:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104340930] [2020-07-17 12:23:18,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:18,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:18,064 INFO L87 Difference]: Start difference. First operand 30887 states and 47313 transitions. Second operand 4 states. [2020-07-17 12:23:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:29,159 INFO L93 Difference]: Finished difference Result 92548 states and 141752 transitions. [2020-07-17 12:23:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:29,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-07-17 12:23:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:29,270 INFO L225 Difference]: With dead ends: 92548 [2020-07-17 12:23:29,271 INFO L226 Difference]: Without dead ends: 61721 [2020-07-17 12:23:29,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2020-07-17 12:23:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 30905. [2020-07-17 12:23:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30905 states. [2020-07-17 12:23:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30905 states to 30905 states and 47334 transitions. [2020-07-17 12:23:30,895 INFO L78 Accepts]: Start accepts. Automaton has 30905 states and 47334 transitions. Word has length 321 [2020-07-17 12:23:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:30,896 INFO L479 AbstractCegarLoop]: Abstraction has 30905 states and 47334 transitions. [2020-07-17 12:23:30,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30905 states and 47334 transitions. [2020-07-17 12:23:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-17 12:23:30,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:30,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:30,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:23:30,918 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash 165674294, now seen corresponding path program 1 times [2020-07-17 12:23:30,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:30,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792281097] [2020-07-17 12:23:30,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:31,537 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:31,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792281097] [2020-07-17 12:23:31,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:31,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:31,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661707730] [2020-07-17 12:23:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:31,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:31,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:31,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:31,740 INFO L87 Difference]: Start difference. First operand 30905 states and 47334 transitions. Second operand 4 states. [2020-07-17 12:23:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:43,217 INFO L93 Difference]: Finished difference Result 87746 states and 134159 transitions. [2020-07-17 12:23:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:43,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-17 12:23:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:43,299 INFO L225 Difference]: With dead ends: 87746 [2020-07-17 12:23:43,300 INFO L226 Difference]: Without dead ends: 57086 [2020-07-17 12:23:43,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57086 states. [2020-07-17 12:23:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57086 to 57084. [2020-07-17 12:23:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57084 states. [2020-07-17 12:23:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57084 states to 57084 states and 86830 transitions. [2020-07-17 12:23:46,825 INFO L78 Accepts]: Start accepts. Automaton has 57084 states and 86830 transitions. Word has length 322 [2020-07-17 12:23:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:46,825 INFO L479 AbstractCegarLoop]: Abstraction has 57084 states and 86830 transitions. [2020-07-17 12:23:46,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 57084 states and 86830 transitions. [2020-07-17 12:23:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-17 12:23:46,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:46,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:46,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:23:46,877 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1404392915, now seen corresponding path program 1 times [2020-07-17 12:23:46,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:46,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069614016] [2020-07-17 12:23:46,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,894 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:48,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069614016] [2020-07-17 12:23:48,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:48,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:23:48,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862135950] [2020-07-17 12:23:48,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:23:48,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:23:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:23:48,016 INFO L87 Difference]: Start difference. First operand 57084 states and 86830 transitions. Second operand 5 states. [2020-07-17 12:23:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:56,855 INFO L93 Difference]: Finished difference Result 115449 states and 175645 transitions. [2020-07-17 12:23:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:23:56,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-07-17 12:23:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:56,943 INFO L225 Difference]: With dead ends: 115449 [2020-07-17 12:23:56,943 INFO L226 Difference]: Without dead ends: 57905 [2020-07-17 12:23:57,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:23:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57905 states. [2020-07-17 12:23:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57905 to 57903. [2020-07-17 12:23:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57903 states. [2020-07-17 12:23:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57903 states to 57903 states and 87752 transitions. [2020-07-17 12:23:59,307 INFO L78 Accepts]: Start accepts. Automaton has 57903 states and 87752 transitions. Word has length 322 [2020-07-17 12:23:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:59,307 INFO L479 AbstractCegarLoop]: Abstraction has 57903 states and 87752 transitions. [2020-07-17 12:23:59,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:23:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57903 states and 87752 transitions. [2020-07-17 12:23:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-17 12:23:59,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:59,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:59,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:23:59,370 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:59,371 INFO L82 PathProgramCache]: Analyzing trace with hash -715741738, now seen corresponding path program 1 times [2020-07-17 12:23:59,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:59,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634065720] [2020-07-17 12:23:59,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:59,915 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:00,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634065720] [2020-07-17 12:24:00,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:00,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:24:00,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514075190] [2020-07-17 12:24:00,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:24:00,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:24:00,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:00,299 INFO L87 Difference]: Start difference. First operand 57903 states and 87752 transitions. Second operand 4 states. [2020-07-17 12:24:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:09,389 INFO L93 Difference]: Finished difference Result 172837 states and 261779 transitions. [2020-07-17 12:24:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:24:09,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-17 12:24:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:09,575 INFO L225 Difference]: With dead ends: 172837 [2020-07-17 12:24:09,575 INFO L226 Difference]: Without dead ends: 115387 [2020-07-17 12:24:09,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115387 states. [2020-07-17 12:24:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115387 to 57961. [2020-07-17 12:24:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57961 states. [2020-07-17 12:24:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57961 states to 57961 states and 87827 transitions. [2020-07-17 12:24:14,192 INFO L78 Accepts]: Start accepts. Automaton has 57961 states and 87827 transitions. Word has length 324 [2020-07-17 12:24:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:14,192 INFO L479 AbstractCegarLoop]: Abstraction has 57961 states and 87827 transitions. [2020-07-17 12:24:14,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:24:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 57961 states and 87827 transitions. [2020-07-17 12:24:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-17 12:24:14,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:14,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:14,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:24:14,253 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 396725324, now seen corresponding path program 1 times [2020-07-17 12:24:14,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:14,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19762116] [2020-07-17 12:24:14,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:14,907 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:15,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19762116] [2020-07-17 12:24:15,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:15,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:24:15,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732663139] [2020-07-17 12:24:15,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:24:15,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:24:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:15,063 INFO L87 Difference]: Start difference. First operand 57961 states and 87827 transitions. Second operand 4 states. [2020-07-17 12:24:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:30,444 INFO L93 Difference]: Finished difference Result 171218 states and 259030 transitions. [2020-07-17 12:24:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:24:30,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-17 12:24:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:30,625 INFO L225 Difference]: With dead ends: 171218 [2020-07-17 12:24:30,626 INFO L226 Difference]: Without dead ends: 113542 [2020-07-17 12:24:30,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113542 states. [2020-07-17 12:24:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113542 to 113540. [2020-07-17 12:24:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113540 states. [2020-07-17 12:24:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113540 states to 113540 states and 170856 transitions. [2020-07-17 12:24:35,705 INFO L78 Accepts]: Start accepts. Automaton has 113540 states and 170856 transitions. Word has length 324 [2020-07-17 12:24:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:35,706 INFO L479 AbstractCegarLoop]: Abstraction has 113540 states and 170856 transitions. [2020-07-17 12:24:35,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:24:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 113540 states and 170856 transitions. [2020-07-17 12:24:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-17 12:24:35,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:35,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:35,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:24:35,810 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1430415401, now seen corresponding path program 1 times [2020-07-17 12:24:35,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:35,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749889203] [2020-07-17 12:24:35,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:36,885 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:37,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749889203] [2020-07-17 12:24:37,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:37,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:24:37,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90337506] [2020-07-17 12:24:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:24:37,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:24:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:24:37,056 INFO L87 Difference]: Start difference. First operand 113540 states and 170856 transitions. Second operand 5 states. [2020-07-17 12:24:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:50,770 INFO L93 Difference]: Finished difference Result 230524 states and 346909 transitions. [2020-07-17 12:24:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:24:50,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-17 12:24:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:50,991 INFO L225 Difference]: With dead ends: 230524 [2020-07-17 12:24:50,992 INFO L226 Difference]: Without dead ends: 115930 [2020-07-17 12:24:51,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:24:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115930 states. [2020-07-17 12:24:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115930 to 115928. [2020-07-17 12:24:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115928 states. [2020-07-17 12:24:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115928 states to 115928 states and 173777 transitions. [2020-07-17 12:24:58,991 INFO L78 Accepts]: Start accepts. Automaton has 115928 states and 173777 transitions. Word has length 324 [2020-07-17 12:24:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:58,992 INFO L479 AbstractCegarLoop]: Abstraction has 115928 states and 173777 transitions. [2020-07-17 12:24:58,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:24:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 115928 states and 173777 transitions. [2020-07-17 12:24:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-17 12:24:59,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:59,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:59,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:24:59,099 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895399, now seen corresponding path program 1 times [2020-07-17 12:24:59,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:59,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018119299] [2020-07-17 12:24:59,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:00,274 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:25:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:00,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018119299] [2020-07-17 12:25:00,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:00,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:25:00,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148460956] [2020-07-17 12:25:00,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:25:00,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:25:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:25:00,774 INFO L87 Difference]: Start difference. First operand 115928 states and 173777 transitions. Second operand 5 states. [2020-07-17 12:25:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:32,163 INFO L93 Difference]: Finished difference Result 441761 states and 661348 transitions. [2020-07-17 12:25:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:25:32,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-17 12:25:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:32,769 INFO L225 Difference]: With dead ends: 441761 [2020-07-17 12:25:32,769 INFO L226 Difference]: Without dead ends: 327813 [2020-07-17 12:25:32,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:25:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327813 states. [2020-07-17 12:25:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327813 to 116455. [2020-07-17 12:25:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116455 states. [2020-07-17 12:25:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116455 states to 116455 states and 174537 transitions. [2020-07-17 12:25:41,485 INFO L78 Accepts]: Start accepts. Automaton has 116455 states and 174537 transitions. Word has length 324 [2020-07-17 12:25:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:41,485 INFO L479 AbstractCegarLoop]: Abstraction has 116455 states and 174537 transitions. [2020-07-17 12:25:41,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:25:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 116455 states and 174537 transitions. [2020-07-17 12:25:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-17 12:25:41,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:41,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:25:41,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:25:41,600 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash 445665130, now seen corresponding path program 1 times [2020-07-17 12:25:41,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:41,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468393118] [2020-07-17 12:25:41,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:42,479 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:25:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:42,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468393118] [2020-07-17 12:25:42,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:42,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:25:42,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712741179] [2020-07-17 12:25:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:25:42,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:25:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:42,677 INFO L87 Difference]: Start difference. First operand 116455 states and 174537 transitions. Second operand 4 states. [2020-07-17 12:26:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:02,641 INFO L93 Difference]: Finished difference Result 295887 states and 447035 transitions. [2020-07-17 12:26:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:02,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-17 12:26:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:03,000 INFO L225 Difference]: With dead ends: 295887 [2020-07-17 12:26:03,001 INFO L226 Difference]: Without dead ends: 185881 [2020-07-17 12:26:03,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185881 states. [2020-07-17 12:26:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185881 to 146359. [2020-07-17 12:26:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146359 states. [2020-07-17 12:26:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146359 states to 146359 states and 222895 transitions. [2020-07-17 12:26:16,370 INFO L78 Accepts]: Start accepts. Automaton has 146359 states and 222895 transitions. Word has length 324 [2020-07-17 12:26:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:16,371 INFO L479 AbstractCegarLoop]: Abstraction has 146359 states and 222895 transitions. [2020-07-17 12:26:16,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 146359 states and 222895 transitions. [2020-07-17 12:26:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:26:16,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:16,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:16,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:26:16,482 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1844980394, now seen corresponding path program 1 times [2020-07-17 12:26:16,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:16,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003242114] [2020-07-17 12:26:16,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:17,351 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:17,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003242114] [2020-07-17 12:26:17,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:17,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:17,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978923284] [2020-07-17 12:26:17,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:17,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:17,504 INFO L87 Difference]: Start difference. First operand 146359 states and 222895 transitions. Second operand 4 states. [2020-07-17 12:26:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:41,485 INFO L93 Difference]: Finished difference Result 370403 states and 566989 transitions. [2020-07-17 12:26:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:41,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-17 12:26:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:41,972 INFO L225 Difference]: With dead ends: 370403 [2020-07-17 12:26:41,972 INFO L226 Difference]: Without dead ends: 231897 [2020-07-17 12:26:42,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231897 states. [2020-07-17 12:27:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231897 to 199847. [2020-07-17 12:27:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199847 states. [2020-07-17 12:27:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199847 states to 199847 states and 309023 transitions. [2020-07-17 12:27:00,696 INFO L78 Accepts]: Start accepts. Automaton has 199847 states and 309023 transitions. Word has length 326 [2020-07-17 12:27:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:00,696 INFO L479 AbstractCegarLoop]: Abstraction has 199847 states and 309023 transitions. [2020-07-17 12:27:00,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 199847 states and 309023 transitions. [2020-07-17 12:27:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:27:00,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:00,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:27:00,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:27:00,808 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1689083675, now seen corresponding path program 1 times [2020-07-17 12:27:00,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:00,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529941717] [2020-07-17 12:27:00,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:01,432 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:01,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529941717] [2020-07-17 12:27:01,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:01,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:27:01,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359769597] [2020-07-17 12:27:01,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:27:01,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:27:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:01,557 INFO L87 Difference]: Start difference. First operand 199847 states and 309023 transitions. Second operand 4 states. [2020-07-17 12:27:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:41,255 INFO L93 Difference]: Finished difference Result 593639 states and 917537 transitions. [2020-07-17 12:27:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:41,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-17 12:27:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:42,148 INFO L225 Difference]: With dead ends: 593639 [2020-07-17 12:27:42,148 INFO L226 Difference]: Without dead ends: 396515 [2020-07-17 12:27:42,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396515 states. [2020-07-17 12:28:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396515 to 200115. [2020-07-17 12:28:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200115 states. [2020-07-17 12:28:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200115 states to 200115 states and 309383 transitions. [2020-07-17 12:28:04,940 INFO L78 Accepts]: Start accepts. Automaton has 200115 states and 309383 transitions. Word has length 326 [2020-07-17 12:28:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:04,941 INFO L479 AbstractCegarLoop]: Abstraction has 200115 states and 309383 transitions. [2020-07-17 12:28:04,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:28:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 200115 states and 309383 transitions. [2020-07-17 12:28:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 12:28:05,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:05,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:28:05,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:28:05,085 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash -700863383, now seen corresponding path program 1 times [2020-07-17 12:28:05,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:05,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663669952] [2020-07-17 12:28:05,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:06,259 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:28:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:28:06,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663669952] [2020-07-17 12:28:06,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:28:06,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:28:06,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155848652] [2020-07-17 12:28:06,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:28:06,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:28:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:28:06,343 INFO L87 Difference]: Start difference. First operand 200115 states and 309383 transitions. Second operand 4 states. [2020-07-17 12:28:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:51,138 INFO L93 Difference]: Finished difference Result 593819 states and 917669 transitions. [2020-07-17 12:28:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:28:51,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-17 12:28:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:52,094 INFO L225 Difference]: With dead ends: 593819 [2020-07-17 12:28:52,095 INFO L226 Difference]: Without dead ends: 396715 [2020-07-17 12:28:52,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:28:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396715 states. [2020-07-17 12:29:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396715 to 200347. [2020-07-17 12:29:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200347 states. [2020-07-17 12:29:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200347 states to 200347 states and 309609 transitions. [2020-07-17 12:29:10,986 INFO L78 Accepts]: Start accepts. Automaton has 200347 states and 309609 transitions. Word has length 327 [2020-07-17 12:29:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:10,987 INFO L479 AbstractCegarLoop]: Abstraction has 200347 states and 309609 transitions. [2020-07-17 12:29:10,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:29:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 200347 states and 309609 transitions. [2020-07-17 12:29:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 12:29:11,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:11,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:29:11,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:29:11,115 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:11,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1551390185, now seen corresponding path program 1 times [2020-07-17 12:29:11,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:11,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749156382] [2020-07-17 12:29:11,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:15,800 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:29:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:15,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749156382] [2020-07-17 12:29:15,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:15,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:29:15,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734592970] [2020-07-17 12:29:15,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:29:15,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:29:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:29:15,979 INFO L87 Difference]: Start difference. First operand 200347 states and 309609 transitions. Second operand 6 states. [2020-07-17 12:29:16,556 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-17 12:29:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:38,887 INFO L93 Difference]: Finished difference Result 393817 states and 608812 transitions. [2020-07-17 12:29:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:29:38,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 327 [2020-07-17 12:29:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:39,184 INFO L225 Difference]: With dead ends: 393817 [2020-07-17 12:29:39,185 INFO L226 Difference]: Without dead ends: 200347 [2020-07-17 12:29:39,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:29:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200347 states. [2020-07-17 12:29:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200347 to 200347. [2020-07-17 12:29:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200347 states. [2020-07-17 12:29:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200347 states to 200347 states and 307087 transitions. [2020-07-17 12:29:59,856 INFO L78 Accepts]: Start accepts. Automaton has 200347 states and 307087 transitions. Word has length 327 [2020-07-17 12:29:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:59,857 INFO L479 AbstractCegarLoop]: Abstraction has 200347 states and 307087 transitions. [2020-07-17 12:29:59,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:29:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 200347 states and 307087 transitions. [2020-07-17 12:29:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 12:29:59,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:59,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:29:59,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 12:29:59,931 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1871199150, now seen corresponding path program 1 times [2020-07-17 12:29:59,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:59,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112025674] [2020-07-17 12:29:59,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:30:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:30:00,731 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:30:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:30:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:30:00,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112025674] [2020-07-17 12:30:00,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:30:00,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 12:30:00,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540218363] [2020-07-17 12:30:00,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:30:00,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:30:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:30:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:30:00,912 INFO L87 Difference]: Start difference. First operand 200347 states and 307087 transitions. Second operand 10 states. [2020-07-17 12:30:01,404 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-07-17 12:30:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:30:56,750 INFO L93 Difference]: Finished difference Result 718473 states and 1114748 transitions. [2020-07-17 12:30:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:30:56,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 327 [2020-07-17 12:30:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:30:57,581 INFO L225 Difference]: With dead ends: 718473 [2020-07-17 12:30:57,581 INFO L226 Difference]: Without dead ends: 525651 [2020-07-17 12:30:57,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:30:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525651 states. [2020-07-17 12:31:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525651 to 379683. [2020-07-17 12:31:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379683 states. [2020-07-17 12:31:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379683 states to 379683 states and 582699 transitions. [2020-07-17 12:31:36,872 INFO L78 Accepts]: Start accepts. Automaton has 379683 states and 582699 transitions. Word has length 327 [2020-07-17 12:31:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:31:36,873 INFO L479 AbstractCegarLoop]: Abstraction has 379683 states and 582699 transitions. [2020-07-17 12:31:36,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:31:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 379683 states and 582699 transitions. [2020-07-17 12:31:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 12:31:36,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:31:36,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:31:36,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 12:31:36,977 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:31:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:31:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1485523804, now seen corresponding path program 1 times [2020-07-17 12:31:36,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:31:36,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650667381] [2020-07-17 12:31:36,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:31:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:37,723 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:31:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:31:37,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650667381] [2020-07-17 12:31:37,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:31:37,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:31:37,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576917260] [2020-07-17 12:31:37,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:31:37,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:31:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:31:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:31:37,820 INFO L87 Difference]: Start difference. First operand 379683 states and 582699 transitions. Second operand 5 states. [2020-07-17 12:32:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:54,737 INFO L93 Difference]: Finished difference Result 1120805 states and 1721566 transitions. [2020-07-17 12:32:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:32:54,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-07-17 12:32:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:55,904 INFO L225 Difference]: With dead ends: 1120805 [2020-07-17 12:32:55,904 INFO L226 Difference]: Without dead ends: 741908 [2020-07-17 12:32:56,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:32:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741908 states.