/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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:08:55,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:08:55,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:08:55,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:08:55,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:08:55,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:08:55,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:08:55,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:08:55,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:08:55,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:08:55,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:08:55,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:08:55,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:08:55,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:08:55,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:08:55,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:08:55,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:08:55,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:08:55,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:08:55,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:08:55,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:08:55,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:08:55,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:08:55,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:08:55,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:08:55,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:08:55,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:08:55,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:08:55,191 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 [2020-08-22 17:08:55,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:08:55,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:08:55,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:08:55,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:08:55,235 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:08:55,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:08:55,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:08:55,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:08:55,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:08:55,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:08:55,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:08:55,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:08:55,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:08:55,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:08:55,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:08:55,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:08:55,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:08:55,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:08:55,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:08:55,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:08:55,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:08:55,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:08:55,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:08:55,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:08:55,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:08:55,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:08:55,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:08:55,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:08:55,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:08:55,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:08:55,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:08:55,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:08:55,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:08:55,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:08:55,623 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:08:55,624 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:08:55,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236ef05ed/44084e279f0f408abc565d878c9c727f/FLAG745e1ad95 [2020-08-22 17:08:56,446 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:08:56,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:08:56,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236ef05ed/44084e279f0f408abc565d878c9c727f/FLAG745e1ad95 [2020-08-22 17:08:56,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236ef05ed/44084e279f0f408abc565d878c9c727f [2020-08-22 17:08:56,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:08:56,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:08:56,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:08:56,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:08:56,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:08:56,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:08:56" (1/1) ... [2020-08-22 17:08:56,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6582132d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:56, skipping insertion in model container [2020-08-22 17:08:56,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:08:56" (1/1) ... [2020-08-22 17:08:56,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:08:56,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:08:58,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:08:58,294 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:08:59,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:08:59,907 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:08:59,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59 WrapperNode [2020-08-22 17:08:59,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:08:59,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:08:59,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:08:59,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:08:59,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:08:59,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:08:59,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:08:59,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:09:00,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:09:00,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:09:00,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (1/1) ... [2020-08-22 17:09:00,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:09:00,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:09:00,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:09:00,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:09:00,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (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 [2020-08-22 17:09:00,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:09:00,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:09:00,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:09:00,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:09:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:09:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:09:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:09:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:09:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:09:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:09:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:09:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:09:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:09:00,231 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:09:00,231 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:09:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:09:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 17:09:00,233 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:09:00,233 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:09:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:09:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:09:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:09:04,603 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:09:04,604 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:09:04,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:09:04 BoogieIcfgContainer [2020-08-22 17:09:04,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:09:04,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:09:04,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:09:04,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:09:04,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:08:56" (1/3) ... [2020-08-22 17:09:04,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f120a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:09:04, skipping insertion in model container [2020-08-22 17:09:04,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:08:59" (2/3) ... [2020-08-22 17:09:04,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f120a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:09:04, skipping insertion in model container [2020-08-22 17:09:04,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:09:04" (3/3) ... [2020-08-22 17:09:04,629 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:09:04,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:09:04,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 17:09:04,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 17:09:04,710 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:09:04,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:09:04,711 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:09:04,711 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:09:04,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:09:04,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:09:04,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:09:04,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:09:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-08-22 17:09:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-08-22 17:09:04,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:09:04,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:09:04,808 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:09:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:09:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-08-22 17:09:04,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:09:04,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396707866] [2020-08-22 17:09:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:09:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:09,089 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:09:09,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:09:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:09:09,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396707866] [2020-08-22 17:09:09,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:09:09,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:09:09,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509065598] [2020-08-22 17:09:09,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:09:09,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:09:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:09:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:09:09,654 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 5 states. [2020-08-22 17:09:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:09:27,120 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2020-08-22 17:09:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:09:27,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-08-22 17:09:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:09:27,189 INFO L225 Difference]: With dead ends: 4059 [2020-08-22 17:09:27,189 INFO L226 Difference]: Without dead ends: 2697 [2020-08-22 17:09:27,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:09:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-08-22 17:09:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-08-22 17:09:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-08-22 17:09:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2020-08-22 17:09:27,459 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2020-08-22 17:09:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:09:27,464 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2020-08-22 17:09:27,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:09:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2020-08-22 17:09:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-08-22 17:09:27,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:09:27,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:09:27,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:09:27,480 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:09:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:09:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times [2020-08-22 17:09:27,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:09:27,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845108680] [2020-08-22 17:09:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:09:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:29,063 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:09:29,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:09:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:09:29,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845108680] [2020-08-22 17:09:29,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:09:29,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:09:29,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731943838] [2020-08-22 17:09:29,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:09:29,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:09:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:09:29,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:09:29,551 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 4 states. [2020-08-22 17:09:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:09:47,847 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2020-08-22 17:09:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:09:47,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-08-22 17:09:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:09:47,875 INFO L225 Difference]: With dead ends: 7670 [2020-08-22 17:09:47,875 INFO L226 Difference]: Without dead ends: 5237 [2020-08-22 17:09:47,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:09:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-08-22 17:09:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-08-22 17:09:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-08-22 17:09:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2020-08-22 17:09:48,067 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2020-08-22 17:09:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:09:48,068 INFO L479 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2020-08-22 17:09:48,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:09:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2020-08-22 17:09:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-08-22 17:09:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:09:48,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:09:48,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:09:48,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:09:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:09:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times [2020-08-22 17:09:48,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:09:48,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067889560] [2020-08-22 17:09:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:09:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:49,068 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:09:49,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:09:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:09:49,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067889560] [2020-08-22 17:09:49,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:09:49,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:09:49,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64031776] [2020-08-22 17:09:49,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:09:49,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:09:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:09:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:09:49,281 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 4 states. [2020-08-22 17:10:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:07,473 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2020-08-22 17:10:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:10:07,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-08-22 17:10:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:07,519 INFO L225 Difference]: With dead ends: 15470 [2020-08-22 17:10:07,519 INFO L226 Difference]: Without dead ends: 10333 [2020-08-22 17:10:07,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2020-08-22 17:10:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2020-08-22 17:10:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-08-22 17:10:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2020-08-22 17:10:07,795 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2020-08-22 17:10:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:07,796 INFO L479 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2020-08-22 17:10:07,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:10:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2020-08-22 17:10:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-08-22 17:10:07,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:07,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:10:07,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:10:07,816 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times [2020-08-22 17:10:07,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:07,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29213880] [2020-08-22 17:10:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:09,118 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:10:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:09,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29213880] [2020-08-22 17:10:09,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:09,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:10:09,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259538265] [2020-08-22 17:10:09,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:10:09,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:10:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:09,425 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 4 states. [2020-08-22 17:10:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:27,755 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2020-08-22 17:10:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:10:27,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-08-22 17:10:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:27,795 INFO L225 Difference]: With dead ends: 15048 [2020-08-22 17:10:27,796 INFO L226 Difference]: Without dead ends: 10211 [2020-08-22 17:10:27,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-08-22 17:10:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-08-22 17:10:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-08-22 17:10:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2020-08-22 17:10:28,183 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2020-08-22 17:10:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:28,183 INFO L479 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2020-08-22 17:10:28,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:10:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2020-08-22 17:10:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-08-22 17:10:28,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:28,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:10:28,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:10:28,209 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times [2020-08-22 17:10:28,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:28,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638691215] [2020-08-22 17:10:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:29,171 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:10:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:29,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638691215] [2020-08-22 17:10:29,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:29,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:10:29,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073762282] [2020-08-22 17:10:29,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:10:29,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:10:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:29,408 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 4 states. [2020-08-22 17:10:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:48,540 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2020-08-22 17:10:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:10:48,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-08-22 17:10:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:48,584 INFO L225 Difference]: With dead ends: 30239 [2020-08-22 17:10:48,585 INFO L226 Difference]: Without dead ends: 20218 [2020-08-22 17:10:48,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-08-22 17:10:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2020-08-22 17:10:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-08-22 17:10:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2020-08-22 17:10:49,053 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2020-08-22 17:10:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:49,053 INFO L479 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2020-08-22 17:10:49,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:10:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2020-08-22 17:10:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-08-22 17:10:49,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:49,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:10:49,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:10:49,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 284183058, now seen corresponding path program 1 times [2020-08-22 17:10:49,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:49,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222346299] [2020-08-22 17:10:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:49,990 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:10:49,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:50,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222346299] [2020-08-22 17:10:50,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:50,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:10:50,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534508935] [2020-08-22 17:10:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:10:50,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:10:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:50,185 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 4 states. [2020-08-22 17:11:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:09,867 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2020-08-22 17:11:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:09,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-08-22 17:11:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:09,913 INFO L225 Difference]: With dead ends: 30374 [2020-08-22 17:11:09,914 INFO L226 Difference]: Without dead ends: 20335 [2020-08-22 17:11:09,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2020-08-22 17:11:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2020-08-22 17:11:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-08-22 17:11:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2020-08-22 17:11:10,356 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2020-08-22 17:11:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:10,357 INFO L479 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2020-08-22 17:11:10,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2020-08-22 17:11:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-08-22 17:11:10,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:10,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:11:10,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:11:10,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:10,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times [2020-08-22 17:11:10,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:10,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000105401] [2020-08-22 17:11:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:11,599 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:11:11,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:11,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000105401] [2020-08-22 17:11:11,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:11,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:11,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109680604] [2020-08-22 17:11:11,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:11,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:11,846 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 4 states. [2020-08-22 17:11:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:31,489 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2020-08-22 17:11:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:31,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-08-22 17:11:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:31,529 INFO L225 Difference]: With dead ends: 29456 [2020-08-22 17:11:31,529 INFO L226 Difference]: Without dead ends: 20045 [2020-08-22 17:11:31,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-08-22 17:11:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-08-22 17:11:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-08-22 17:11:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2020-08-22 17:11:32,470 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2020-08-22 17:11:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:32,471 INFO L479 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2020-08-22 17:11:32,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2020-08-22 17:11:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-08-22 17:11:32,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:32,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:11:32,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:11:32,500 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times [2020-08-22 17:11:32,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:32,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753822972] [2020-08-22 17:11:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:34,514 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:11:34,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:34,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753822972] [2020-08-22 17:11:34,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:34,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:11:34,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459618485] [2020-08-22 17:11:34,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:11:34,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:11:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:11:34,810 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 5 states. [2020-08-22 17:11:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:51,191 INFO L93 Difference]: Finished difference Result 47599 states and 77546 transitions. [2020-08-22 17:11:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:11:51,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 470 [2020-08-22 17:11:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:51,227 INFO L225 Difference]: With dead ends: 47599 [2020-08-22 17:11:51,228 INFO L226 Difference]: Without dead ends: 24408 [2020-08-22 17:11:51,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:11:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2020-08-22 17:11:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 24355. [2020-08-22 17:11:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24355 states. [2020-08-22 17:11:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24355 states to 24355 states and 39550 transitions. [2020-08-22 17:11:52,146 INFO L78 Accepts]: Start accepts. Automaton has 24355 states and 39550 transitions. Word has length 470 [2020-08-22 17:11:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:52,146 INFO L479 AbstractCegarLoop]: Abstraction has 24355 states and 39550 transitions. [2020-08-22 17:11:52,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:11:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24355 states and 39550 transitions. [2020-08-22 17:11:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-08-22 17:11:52,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:52,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:11:52,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:11:52,174 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1583646567, now seen corresponding path program 1 times [2020-08-22 17:11:52,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:52,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155153579] [2020-08-22 17:11:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:54,336 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:11:54,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:54,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155153579] [2020-08-22 17:11:54,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:54,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:54,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920800187] [2020-08-22 17:11:54,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:54,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:54,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:54,742 INFO L87 Difference]: Start difference. First operand 24355 states and 39550 transitions. Second operand 4 states. [2020-08-22 17:12:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:16,510 INFO L93 Difference]: Finished difference Result 71217 states and 115711 transitions. [2020-08-22 17:12:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:16,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-08-22 17:12:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:16,575 INFO L225 Difference]: With dead ends: 71217 [2020-08-22 17:12:16,575 INFO L226 Difference]: Without dead ends: 47882 [2020-08-22 17:12:16,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47882 states. [2020-08-22 17:12:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47882 to 47846. [2020-08-22 17:12:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47846 states. [2020-08-22 17:12:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47846 states to 47846 states and 77425 transitions. [2020-08-22 17:12:18,485 INFO L78 Accepts]: Start accepts. Automaton has 47846 states and 77425 transitions. Word has length 472 [2020-08-22 17:12:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:18,485 INFO L479 AbstractCegarLoop]: Abstraction has 47846 states and 77425 transitions. [2020-08-22 17:12:18,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 47846 states and 77425 transitions. [2020-08-22 17:12:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-08-22 17:12:18,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:18,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:12:18,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:12:18,529 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash 832056112, now seen corresponding path program 1 times [2020-08-22 17:12:18,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:18,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201554163] [2020-08-22 17:12:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:19,500 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:12:19,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201554163] [2020-08-22 17:12:19,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:19,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129424872] [2020-08-22 17:12:19,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:19,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:19,867 INFO L87 Difference]: Start difference. First operand 47846 states and 77425 transitions. Second operand 4 states. [2020-08-22 17:12:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:34,166 INFO L93 Difference]: Finished difference Result 138790 states and 224305 transitions. [2020-08-22 17:12:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:34,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-08-22 17:12:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:34,260 INFO L225 Difference]: With dead ends: 138790 [2020-08-22 17:12:34,260 INFO L226 Difference]: Without dead ends: 93337 [2020-08-22 17:12:34,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93337 states. [2020-08-22 17:12:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93337 to 48236. [2020-08-22 17:12:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48236 states. [2020-08-22 17:12:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48236 states to 48236 states and 78001 transitions. [2020-08-22 17:12:36,611 INFO L78 Accepts]: Start accepts. Automaton has 48236 states and 78001 transitions. Word has length 473 [2020-08-22 17:12:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:36,612 INFO L479 AbstractCegarLoop]: Abstraction has 48236 states and 78001 transitions. [2020-08-22 17:12:36,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48236 states and 78001 transitions. [2020-08-22 17:12:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-08-22 17:12:36,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:36,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:12:36,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:12:36,669 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1772484418, now seen corresponding path program 1 times [2020-08-22 17:12:36,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:36,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945938631] [2020-08-22 17:12:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:37,812 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:12:37,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:38,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945938631] [2020-08-22 17:12:38,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:38,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:38,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775081901] [2020-08-22 17:12:38,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:38,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:38,414 INFO L87 Difference]: Start difference. First operand 48236 states and 78001 transitions. Second operand 4 states. [2020-08-22 17:13:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:02,812 INFO L93 Difference]: Finished difference Result 140167 states and 226533 transitions. [2020-08-22 17:13:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:13:02,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-08-22 17:13:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:04,645 INFO L225 Difference]: With dead ends: 140167 [2020-08-22 17:13:04,646 INFO L226 Difference]: Without dead ends: 94781 [2020-08-22 17:13:04,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94781 states. [2020-08-22 17:13:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94781 to 94747. [2020-08-22 17:13:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94747 states. [2020-08-22 17:13:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94747 states to 94747 states and 152646 transitions. [2020-08-22 17:13:08,464 INFO L78 Accepts]: Start accepts. Automaton has 94747 states and 152646 transitions. Word has length 474 [2020-08-22 17:13:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:08,465 INFO L479 AbstractCegarLoop]: Abstraction has 94747 states and 152646 transitions. [2020-08-22 17:13:08,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:13:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 94747 states and 152646 transitions. [2020-08-22 17:13:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-08-22 17:13:08,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:08,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:13:08,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:13:08,538 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash -869161505, now seen corresponding path program 1 times [2020-08-22 17:13:08,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:08,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590368173] [2020-08-22 17:13:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:10,315 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:13:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:10,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590368173] [2020-08-22 17:13:10,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:10,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:13:10,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252373562] [2020-08-22 17:13:10,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:13:10,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:13:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:13:10,452 INFO L87 Difference]: Start difference. First operand 94747 states and 152646 transitions. Second operand 5 states. [2020-08-22 17:13:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:35,031 INFO L93 Difference]: Finished difference Result 233316 states and 378328 transitions. [2020-08-22 17:13:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:13:35,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-08-22 17:13:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:35,159 INFO L225 Difference]: With dead ends: 233316 [2020-08-22 17:13:35,159 INFO L226 Difference]: Without dead ends: 120293 [2020-08-22 17:13:35,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:13:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120293 states. [2020-08-22 17:13:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120293 to 120214. [2020-08-22 17:13:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120214 states. [2020-08-22 17:13:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120214 states to 120214 states and 194430 transitions. [2020-08-22 17:13:42,629 INFO L78 Accepts]: Start accepts. Automaton has 120214 states and 194430 transitions. Word has length 474 [2020-08-22 17:13:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:42,630 INFO L479 AbstractCegarLoop]: Abstraction has 120214 states and 194430 transitions. [2020-08-22 17:13:42,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:13:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 120214 states and 194430 transitions. [2020-08-22 17:13:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:13:42,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:42,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:13:42,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:13:42,732 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:42,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times [2020-08-22 17:13:42,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:42,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141211178] [2020-08-22 17:13:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:44,071 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:13:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:44,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141211178] [2020-08-22 17:13:44,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:44,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:13:44,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659400451] [2020-08-22 17:13:44,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:13:44,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:44,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:13:44,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:13:44,394 INFO L87 Difference]: Start difference. First operand 120214 states and 194430 transitions. Second operand 6 states. [2020-08-22 17:13:45,309 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-08-22 17:14:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:02,042 INFO L93 Difference]: Finished difference Result 169749 states and 269657 transitions. [2020-08-22 17:14:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:14:02,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 476 [2020-08-22 17:14:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:02,157 INFO L225 Difference]: With dead ends: 169749 [2020-08-22 17:14:02,157 INFO L226 Difference]: Without dead ends: 120214 [2020-08-22 17:14:02,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 17:14:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120214 states. [2020-08-22 17:14:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120214 to 120214. [2020-08-22 17:14:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120214 states. [2020-08-22 17:14:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120214 states to 120214 states and 193254 transitions. [2020-08-22 17:14:08,099 INFO L78 Accepts]: Start accepts. Automaton has 120214 states and 193254 transitions. Word has length 476 [2020-08-22 17:14:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:08,100 INFO L479 AbstractCegarLoop]: Abstraction has 120214 states and 193254 transitions. [2020-08-22 17:14:08,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:14:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 120214 states and 193254 transitions. [2020-08-22 17:14:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:14:08,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:08,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:08,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:14:08,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1539997558, now seen corresponding path program 1 times [2020-08-22 17:14:08,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:08,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497721455] [2020-08-22 17:14:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:10,443 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:14:10,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:10,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497721455] [2020-08-22 17:14:10,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:10,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 17:14:10,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685790721] [2020-08-22 17:14:10,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 17:14:10,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 17:14:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 17:14:10,874 INFO L87 Difference]: Start difference. First operand 120214 states and 193254 transitions. Second operand 14 states. [2020-08-22 17:14:11,958 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-08-22 17:14:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:39,266 INFO L93 Difference]: Finished difference Result 181460 states and 288388 transitions. [2020-08-22 17:14:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 17:14:39,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-08-22 17:14:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:39,426 INFO L225 Difference]: With dead ends: 181460 [2020-08-22 17:14:39,427 INFO L226 Difference]: Without dead ends: 174205 [2020-08-22 17:14:39,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 17:14:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174205 states. [2020-08-22 17:14:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174205 to 130118. [2020-08-22 17:14:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130118 states. [2020-08-22 17:14:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130118 states to 130118 states and 207446 transitions. [2020-08-22 17:14:46,664 INFO L78 Accepts]: Start accepts. Automaton has 130118 states and 207446 transitions. Word has length 476 [2020-08-22 17:14:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:46,664 INFO L479 AbstractCegarLoop]: Abstraction has 130118 states and 207446 transitions. [2020-08-22 17:14:46,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 17:14:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 130118 states and 207446 transitions. [2020-08-22 17:14:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:14:46,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:46,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:46,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:14:46,765 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash -450585505, now seen corresponding path program 1 times [2020-08-22 17:14:46,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:46,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470866660] [2020-08-22 17:14:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:49,096 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:14:49,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:49,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470866660] [2020-08-22 17:14:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:49,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:49,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31610179] [2020-08-22 17:14:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:49,329 INFO L87 Difference]: Start difference. First operand 130118 states and 207446 transitions. Second operand 5 states. [2020-08-22 17:15:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:22,070 INFO L93 Difference]: Finished difference Result 376638 states and 599929 transitions. [2020-08-22 17:15:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:15:22,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 17:15:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:22,327 INFO L225 Difference]: With dead ends: 376638 [2020-08-22 17:15:22,327 INFO L226 Difference]: Without dead ends: 250722 [2020-08-22 17:15:22,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250722 states. [2020-08-22 17:15:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250722 to 250671. [2020-08-22 17:15:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250671 states. [2020-08-22 17:15:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250671 states to 250671 states and 397800 transitions. [2020-08-22 17:15:43,191 INFO L78 Accepts]: Start accepts. Automaton has 250671 states and 397800 transitions. Word has length 476 [2020-08-22 17:15:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:43,192 INFO L479 AbstractCegarLoop]: Abstraction has 250671 states and 397800 transitions. [2020-08-22 17:15:43,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 250671 states and 397800 transitions. [2020-08-22 17:15:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:15:43,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:43,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:43,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:15:43,444 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash -596441289, now seen corresponding path program 1 times [2020-08-22 17:15:43,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:43,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088338966] [2020-08-22 17:15:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:45,125 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:15:45,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:45,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088338966] [2020-08-22 17:15:45,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:45,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:15:45,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663447081] [2020-08-22 17:15:45,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:15:45,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:15:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:15:45,294 INFO L87 Difference]: Start difference. First operand 250671 states and 397800 transitions. Second operand 5 states. [2020-08-22 17:16:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:29,218 INFO L93 Difference]: Finished difference Result 626254 states and 999630 transitions. [2020-08-22 17:16:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:16:29,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 17:16:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:29,581 INFO L225 Difference]: With dead ends: 626254 [2020-08-22 17:16:29,581 INFO L226 Difference]: Without dead ends: 321419 [2020-08-22 17:16:29,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:16:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321419 states. [2020-08-22 17:16:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321419 to 321340. [2020-08-22 17:16:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321340 states. [2020-08-22 17:16:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321340 states to 321340 states and 511811 transitions. [2020-08-22 17:16:56,533 INFO L78 Accepts]: Start accepts. Automaton has 321340 states and 511811 transitions. Word has length 476 [2020-08-22 17:16:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:56,533 INFO L479 AbstractCegarLoop]: Abstraction has 321340 states and 511811 transitions. [2020-08-22 17:16:56,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:16:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 321340 states and 511811 transitions. [2020-08-22 17:16:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:16:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:56,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:56,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:16:56,814 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash -474978496, now seen corresponding path program 1 times [2020-08-22 17:16:56,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:56,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438014065] [2020-08-22 17:16:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:58,737 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:16:58,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:58,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438014065] [2020-08-22 17:16:58,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:58,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:58,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361922212] [2020-08-22 17:16:58,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:58,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:58,906 INFO L87 Difference]: Start difference. First operand 321340 states and 511811 transitions. Second operand 5 states. [2020-08-22 17:18:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:09,678 INFO L93 Difference]: Finished difference Result 861071 states and 1362430 transitions. [2020-08-22 17:18:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:18:09,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 17:18:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:10,335 INFO L225 Difference]: With dead ends: 861071 [2020-08-22 17:18:10,336 INFO L226 Difference]: Without dead ends: 575528 [2020-08-22 17:18:10,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:18:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575528 states. [2020-08-22 17:18:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575528 to 337569. [2020-08-22 17:18:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337569 states. [2020-08-22 17:18:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337569 states to 337569 states and 537970 transitions. [2020-08-22 17:18:43,572 INFO L78 Accepts]: Start accepts. Automaton has 337569 states and 537970 transitions. Word has length 476 [2020-08-22 17:18:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:43,573 INFO L479 AbstractCegarLoop]: Abstraction has 337569 states and 537970 transitions. [2020-08-22 17:18:43,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:18:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 337569 states and 537970 transitions. [2020-08-22 17:18:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-08-22 17:18:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:43,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:18:43,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:18:43,877 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash 395280083, now seen corresponding path program 1 times [2020-08-22 17:18:43,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:43,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040532525] [2020-08-22 17:18:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:44,962 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-08-22 17:18:44,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:45,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040532525] [2020-08-22 17:18:45,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:45,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:18:45,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145136657] [2020-08-22 17:18:45,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:18:45,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:18:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:45,663 INFO L87 Difference]: Start difference. First operand 337569 states and 537970 transitions. Second operand 4 states. [2020-08-22 17:20:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:20:02,822 INFO L93 Difference]: Finished difference Result 958297 states and 1523173 transitions. [2020-08-22 17:20:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:20:02,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-08-22 17:20:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:20:03,734 INFO L225 Difference]: With dead ends: 958297 [2020-08-22 17:20:03,734 INFO L226 Difference]: Without dead ends: 652016 [2020-08-22 17:20:04,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:20:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652016 states.