/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:08:10,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:08:10,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:08:10,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:08:10,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:08:10,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:08:10,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:08:10,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:08:10,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:08:10,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:08:10,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:08:10,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:08:10,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:08:10,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:08:10,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:08:10,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:08:10,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:08:10,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:08:10,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:08:10,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:08:10,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:08:10,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:08:10,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:08:10,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:08:10,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:08:10,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:08:10,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:08:10,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:08:10,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:08:10,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:08:10,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:08:10,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:08:10,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:08:10,229 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:08:10,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:08:10,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:08:10,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:08:10,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:08:10,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:08:10,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:08:10,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:08:10,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:08:10,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:08:10,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:08:10,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:08:10,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:08:10,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:08:10,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:08:10,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:08:10,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:08:10,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:08:10,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:08:10,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:08:10,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:08:10,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:08:10,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:08:10,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:08:10,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:08:10,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:08:10,655 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:08:10,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:08:10,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dee43d86/37668755cf9f45c7a90b0ea5f659be01/FLAGae7c8787c [2020-12-22 09:08:11,618 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:08:11,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:08:11,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dee43d86/37668755cf9f45c7a90b0ea5f659be01/FLAGae7c8787c [2020-12-22 09:08:11,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dee43d86/37668755cf9f45c7a90b0ea5f659be01 [2020-12-22 09:08:11,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:08:11,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:08:11,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:11,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:08:11,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:08:11,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:11" (1/1) ... [2020-12-22 09:08:11,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44837fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:11, skipping insertion in model container [2020-12-22 09:08:11,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:11" (1/1) ... [2020-12-22 09:08:11,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:08:11,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:08:12,701 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34789,34802] [2020-12-22 09:08:13,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:13,113 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:08:13,477 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34789,34802] [2020-12-22 09:08:13,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:13,731 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:08:13,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13 WrapperNode [2020-12-22 09:08:13,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:13,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:13,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:08:13,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:08:13,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:13,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:08:13,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:08:13,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:08:13,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:13,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:14,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:14,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (1/1) ... [2020-12-22 09:08:14,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:08:14,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:08:14,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:08:14,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:08:14,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (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 [2020-12-22 09:08:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:08:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:08:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:08:14,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:08:16,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:08:16,980 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:08:16,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:16 BoogieIcfgContainer [2020-12-22 09:08:16,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:08:16,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:08:16,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:08:16,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:08:16,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:08:11" (1/3) ... [2020-12-22 09:08:16,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d86591a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:16, skipping insertion in model container [2020-12-22 09:08:16,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:13" (2/3) ... [2020-12-22 09:08:16,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d86591a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:16, skipping insertion in model container [2020-12-22 09:08:16,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:16" (3/3) ... [2020-12-22 09:08:16,993 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:08:17,001 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:08:17,007 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:08:17,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:08:17,061 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:08:17,062 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:08:17,062 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:08:17,062 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:08:17,062 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:08:17,062 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:08:17,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:08:17,063 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:08:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states. [2020-12-22 09:08:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 09:08:17,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:17,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:17,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:17,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1895719391, now seen corresponding path program 1 times [2020-12-22 09:08:17,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:17,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386707785] [2020-12-22 09:08:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:18,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386707785] [2020-12-22 09:08:18,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:18,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873554777] [2020-12-22 09:08:18,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:18,273 INFO L87 Difference]: Start difference. First operand 803 states. Second operand 3 states. [2020-12-22 09:08:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:18,657 INFO L93 Difference]: Finished difference Result 1520 states and 2676 transitions. [2020-12-22 09:08:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:18,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-12-22 09:08:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:18,716 INFO L225 Difference]: With dead ends: 1520 [2020-12-22 09:08:18,716 INFO L226 Difference]: Without dead ends: 1307 [2020-12-22 09:08:18,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-12-22 09:08:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2020-12-22 09:08:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-12-22 09:08:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2036 transitions. [2020-12-22 09:08:18,897 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2036 transitions. Word has length 326 [2020-12-22 09:08:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:18,901 INFO L481 AbstractCegarLoop]: Abstraction has 1305 states and 2036 transitions. [2020-12-22 09:08:18,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2036 transitions. [2020-12-22 09:08:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 09:08:18,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:18,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:18,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:08:18,920 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash -838090867, now seen corresponding path program 1 times [2020-12-22 09:08:18,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:18,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009662167] [2020-12-22 09:08:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009662167] [2020-12-22 09:08:19,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:19,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:19,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962916611] [2020-12-22 09:08:19,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:19,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:19,427 INFO L87 Difference]: Start difference. First operand 1305 states and 2036 transitions. Second operand 3 states. [2020-12-22 09:08:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:19,716 INFO L93 Difference]: Finished difference Result 2635 states and 4139 transitions. [2020-12-22 09:08:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:19,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-12-22 09:08:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:19,737 INFO L225 Difference]: With dead ends: 2635 [2020-12-22 09:08:19,737 INFO L226 Difference]: Without dead ends: 2277 [2020-12-22 09:08:19,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-12-22 09:08:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2275. [2020-12-22 09:08:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-12-22 09:08:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3540 transitions. [2020-12-22 09:08:19,893 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3540 transitions. Word has length 326 [2020-12-22 09:08:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:19,895 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 3540 transitions. [2020-12-22 09:08:19,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3540 transitions. [2020-12-22 09:08:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 09:08:19,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:19,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:19,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:08:19,907 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash -610935221, now seen corresponding path program 1 times [2020-12-22 09:08:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:19,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758212329] [2020-12-22 09:08:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758212329] [2020-12-22 09:08:20,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:20,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:20,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497283372] [2020-12-22 09:08:20,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:20,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:20,534 INFO L87 Difference]: Start difference. First operand 2275 states and 3540 transitions. Second operand 3 states. [2020-12-22 09:08:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:20,870 INFO L93 Difference]: Finished difference Result 4843 states and 7598 transitions. [2020-12-22 09:08:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:20,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-12-22 09:08:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:20,898 INFO L225 Difference]: With dead ends: 4843 [2020-12-22 09:08:20,898 INFO L226 Difference]: Without dead ends: 4177 [2020-12-22 09:08:20,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2020-12-22 09:08:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4175. [2020-12-22 09:08:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4175 states. [2020-12-22 09:08:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4175 states to 4175 states and 6480 transitions. [2020-12-22 09:08:21,097 INFO L78 Accepts]: Start accepts. Automaton has 4175 states and 6480 transitions. Word has length 326 [2020-12-22 09:08:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 4175 states and 6480 transitions. [2020-12-22 09:08:21,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4175 states and 6480 transitions. [2020-12-22 09:08:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 09:08:21,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:21,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:21,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:08:21,119 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:21,121 INFO L82 PathProgramCache]: Analyzing trace with hash 621643781, now seen corresponding path program 1 times [2020-12-22 09:08:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:21,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691204686] [2020-12-22 09:08:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691204686] [2020-12-22 09:08:21,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:21,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:21,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480995717] [2020-12-22 09:08:21,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:21,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:21,949 INFO L87 Difference]: Start difference. First operand 4175 states and 6480 transitions. Second operand 4 states. [2020-12-22 09:08:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:22,487 INFO L93 Difference]: Finished difference Result 12354 states and 19153 transitions. [2020-12-22 09:08:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:22,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-12-22 09:08:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:22,537 INFO L225 Difference]: With dead ends: 12354 [2020-12-22 09:08:22,538 INFO L226 Difference]: Without dead ends: 8190 [2020-12-22 09:08:22,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2020-12-22 09:08:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 8188. [2020-12-22 09:08:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8188 states. [2020-12-22 09:08:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 12634 transitions. [2020-12-22 09:08:23,081 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 12634 transitions. Word has length 326 [2020-12-22 09:08:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:23,081 INFO L481 AbstractCegarLoop]: Abstraction has 8188 states and 12634 transitions. [2020-12-22 09:08:23,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 12634 transitions. [2020-12-22 09:08:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 09:08:23,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:23,101 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] [2020-12-22 09:08:23,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:08:23,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1177259334, now seen corresponding path program 1 times [2020-12-22 09:08:23,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:23,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327513285] [2020-12-22 09:08:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:23,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327513285] [2020-12-22 09:08:23,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:23,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:23,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226908546] [2020-12-22 09:08:23,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:23,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:23,466 INFO L87 Difference]: Start difference. First operand 8188 states and 12634 transitions. Second operand 3 states. [2020-12-22 09:08:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:24,184 INFO L93 Difference]: Finished difference Result 24127 states and 37158 transitions. [2020-12-22 09:08:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:24,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-12-22 09:08:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:24,275 INFO L225 Difference]: With dead ends: 24127 [2020-12-22 09:08:24,276 INFO L226 Difference]: Without dead ends: 16064 [2020-12-22 09:08:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16064 states. [2020-12-22 09:08:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16064 to 16062. [2020-12-22 09:08:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16062 states. [2020-12-22 09:08:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16062 states to 16062 states and 24639 transitions. [2020-12-22 09:08:25,277 INFO L78 Accepts]: Start accepts. Automaton has 16062 states and 24639 transitions. Word has length 328 [2020-12-22 09:08:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:25,278 INFO L481 AbstractCegarLoop]: Abstraction has 16062 states and 24639 transitions. [2020-12-22 09:08:25,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 16062 states and 24639 transitions. [2020-12-22 09:08:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 09:08:25,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:25,309 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] [2020-12-22 09:08:25,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:08:25,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2057091457, now seen corresponding path program 1 times [2020-12-22 09:08:25,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919659065] [2020-12-22 09:08:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919659065] [2020-12-22 09:08:25,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:25,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:25,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513174174] [2020-12-22 09:08:25,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:25,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:25,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:25,565 INFO L87 Difference]: Start difference. First operand 16062 states and 24639 transitions. Second operand 3 states. [2020-12-22 09:08:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:26,724 INFO L93 Difference]: Finished difference Result 48119 states and 73801 transitions. [2020-12-22 09:08:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:26,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-12-22 09:08:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:26,801 INFO L225 Difference]: With dead ends: 48119 [2020-12-22 09:08:26,801 INFO L226 Difference]: Without dead ends: 32095 [2020-12-22 09:08:26,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32095 states. [2020-12-22 09:08:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32095 to 16081. [2020-12-22 09:08:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16081 states. [2020-12-22 09:08:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16081 states to 16081 states and 24667 transitions. [2020-12-22 09:08:27,828 INFO L78 Accepts]: Start accepts. Automaton has 16081 states and 24667 transitions. Word has length 328 [2020-12-22 09:08:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:27,828 INFO L481 AbstractCegarLoop]: Abstraction has 16081 states and 24667 transitions. [2020-12-22 09:08:27,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16081 states and 24667 transitions. [2020-12-22 09:08:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-12-22 09:08:27,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:27,860 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] [2020-12-22 09:08:27,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:08:27,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1095378133, now seen corresponding path program 1 times [2020-12-22 09:08:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:27,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995407918] [2020-12-22 09:08:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:28,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995407918] [2020-12-22 09:08:28,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:28,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:28,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722750838] [2020-12-22 09:08:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:28,160 INFO L87 Difference]: Start difference. First operand 16081 states and 24667 transitions. Second operand 3 states. [2020-12-22 09:08:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:29,593 INFO L93 Difference]: Finished difference Result 48138 states and 73822 transitions. [2020-12-22 09:08:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:29,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-12-22 09:08:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:29,668 INFO L225 Difference]: With dead ends: 48138 [2020-12-22 09:08:29,669 INFO L226 Difference]: Without dead ends: 32113 [2020-12-22 09:08:29,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32113 states. [2020-12-22 09:08:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32113 to 16099. [2020-12-22 09:08:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16099 states. [2020-12-22 09:08:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16099 states to 16099 states and 24688 transitions. [2020-12-22 09:08:30,543 INFO L78 Accepts]: Start accepts. Automaton has 16099 states and 24688 transitions. Word has length 329 [2020-12-22 09:08:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:30,543 INFO L481 AbstractCegarLoop]: Abstraction has 16099 states and 24688 transitions. [2020-12-22 09:08:30,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16099 states and 24688 transitions. [2020-12-22 09:08:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-22 09:08:30,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:30,574 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] [2020-12-22 09:08:30,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:08:30,575 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -174338763, now seen corresponding path program 1 times [2020-12-22 09:08:30,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:30,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995675682] [2020-12-22 09:08:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:30,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995675682] [2020-12-22 09:08:30,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:30,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450529103] [2020-12-22 09:08:30,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:30,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:30,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:30,989 INFO L87 Difference]: Start difference. First operand 16099 states and 24688 transitions. Second operand 3 states. [2020-12-22 09:08:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:32,227 INFO L93 Difference]: Finished difference Result 47338 states and 72449 transitions. [2020-12-22 09:08:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:32,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-12-22 09:08:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:32,401 INFO L225 Difference]: With dead ends: 47338 [2020-12-22 09:08:32,401 INFO L226 Difference]: Without dead ends: 31480 [2020-12-22 09:08:32,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31480 states. [2020-12-22 09:08:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31480 to 31478. [2020-12-22 09:08:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31478 states. [2020-12-22 09:08:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31478 states to 31478 states and 47960 transitions. [2020-12-22 09:08:33,801 INFO L78 Accepts]: Start accepts. Automaton has 31478 states and 47960 transitions. Word has length 330 [2020-12-22 09:08:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:33,801 INFO L481 AbstractCegarLoop]: Abstraction has 31478 states and 47960 transitions. [2020-12-22 09:08:33,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31478 states and 47960 transitions. [2020-12-22 09:08:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-22 09:08:33,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:33,883 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] [2020-12-22 09:08:33,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:08:33,883 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:33,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2022187602, now seen corresponding path program 1 times [2020-12-22 09:08:33,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:33,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156744268] [2020-12-22 09:08:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156744268] [2020-12-22 09:08:34,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:34,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:08:34,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435979104] [2020-12-22 09:08:34,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:08:34,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:08:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:34,579 INFO L87 Difference]: Start difference. First operand 31478 states and 47960 transitions. Second operand 5 states. [2020-12-22 09:08:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:37,412 INFO L93 Difference]: Finished difference Result 92872 states and 141265 transitions. [2020-12-22 09:08:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:37,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-12-22 09:08:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:37,530 INFO L225 Difference]: With dead ends: 92872 [2020-12-22 09:08:37,531 INFO L226 Difference]: Without dead ends: 61449 [2020-12-22 09:08:37,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61449 states. [2020-12-22 09:08:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61449 to 61447. [2020-12-22 09:08:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61447 states. [2020-12-22 09:08:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61447 states to 61447 states and 92945 transitions. [2020-12-22 09:08:40,533 INFO L78 Accepts]: Start accepts. Automaton has 61447 states and 92945 transitions. Word has length 330 [2020-12-22 09:08:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:40,534 INFO L481 AbstractCegarLoop]: Abstraction has 61447 states and 92945 transitions. [2020-12-22 09:08:40,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:08:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 61447 states and 92945 transitions. [2020-12-22 09:08:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-12-22 09:08:40,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:40,596 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] [2020-12-22 09:08:40,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:08:40,597 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1558694314, now seen corresponding path program 1 times [2020-12-22 09:08:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:40,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436572928] [2020-12-22 09:08:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436572928] [2020-12-22 09:08:41,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:41,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:41,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340054703] [2020-12-22 09:08:41,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:41,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:41,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:41,337 INFO L87 Difference]: Start difference. First operand 61447 states and 92945 transitions. Second operand 4 states. [2020-12-22 09:08:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:46,311 INFO L93 Difference]: Finished difference Result 181523 states and 274143 transitions. [2020-12-22 09:08:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:46,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-12-22 09:08:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:46,621 INFO L225 Difference]: With dead ends: 181523 [2020-12-22 09:08:46,621 INFO L226 Difference]: Without dead ends: 120273 [2020-12-22 09:08:46,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120273 states. [2020-12-22 09:08:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120273 to 120271. [2020-12-22 09:08:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120271 states. [2020-12-22 09:08:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120271 states to 120271 states and 180640 transitions. [2020-12-22 09:08:52,645 INFO L78 Accepts]: Start accepts. Automaton has 120271 states and 180640 transitions. Word has length 332 [2020-12-22 09:08:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:52,645 INFO L481 AbstractCegarLoop]: Abstraction has 120271 states and 180640 transitions. [2020-12-22 09:08:52,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 120271 states and 180640 transitions. [2020-12-22 09:08:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-22 09:08:52,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:52,764 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] [2020-12-22 09:08:52,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:08:52,765 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 77195606, now seen corresponding path program 1 times [2020-12-22 09:08:52,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:52,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809004552] [2020-12-22 09:08:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809004552] [2020-12-22 09:08:53,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:53,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235837920] [2020-12-22 09:08:53,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:53,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:53,281 INFO L87 Difference]: Start difference. First operand 120271 states and 180640 transitions. Second operand 3 states. [2020-12-22 09:09:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:02,221 INFO L93 Difference]: Finished difference Result 354885 states and 532000 transitions. [2020-12-22 09:09:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:09:02,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-12-22 09:09:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:02,609 INFO L225 Difference]: With dead ends: 354885 [2020-12-22 09:09:02,609 INFO L226 Difference]: Without dead ends: 235507 [2020-12-22 09:09:02,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235507 states. [2020-12-22 09:09:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235507 to 235505. [2020-12-22 09:09:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235505 states. [2020-12-22 09:09:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235505 states to 235505 states and 351186 transitions. [2020-12-22 09:09:14,935 INFO L78 Accepts]: Start accepts. Automaton has 235505 states and 351186 transitions. Word has length 334 [2020-12-22 09:09:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:14,935 INFO L481 AbstractCegarLoop]: Abstraction has 235505 states and 351186 transitions. [2020-12-22 09:09:14,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:09:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 235505 states and 351186 transitions. [2020-12-22 09:09:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-22 09:09:15,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:15,098 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] [2020-12-22 09:09:15,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:09:15,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1984940837, now seen corresponding path program 1 times [2020-12-22 09:09:15,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:15,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327460205] [2020-12-22 09:09:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:09:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327460205] [2020-12-22 09:09:15,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:15,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:09:15,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094353368] [2020-12-22 09:09:15,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:09:15,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:09:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:15,707 INFO L87 Difference]: Start difference. First operand 235505 states and 351186 transitions. Second operand 3 states. [2020-12-22 09:09:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:33,721 INFO L93 Difference]: Finished difference Result 705719 states and 1052252 transitions. [2020-12-22 09:09:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:09:33,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-12-22 09:09:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:34,733 INFO L225 Difference]: With dead ends: 705719 [2020-12-22 09:09:34,733 INFO L226 Difference]: Without dead ends: 470657 [2020-12-22 09:09:35,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470657 states. [2020-12-22 09:09:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470657 to 235695. [2020-12-22 09:09:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235695 states. [2020-12-22 09:09:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235695 states to 235695 states and 351466 transitions. [2020-12-22 09:09:49,973 INFO L78 Accepts]: Start accepts. Automaton has 235695 states and 351466 transitions. Word has length 334 [2020-12-22 09:09:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:49,973 INFO L481 AbstractCegarLoop]: Abstraction has 235695 states and 351466 transitions. [2020-12-22 09:09:49,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:09:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 235695 states and 351466 transitions. [2020-12-22 09:09:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-12-22 09:09:50,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:50,125 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] [2020-12-22 09:09:50,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:09:50,126 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1987471347, now seen corresponding path program 1 times [2020-12-22 09:09:50,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:50,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216972203] [2020-12-22 09:09:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:09:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216972203] [2020-12-22 09:09:50,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:50,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:09:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907852690] [2020-12-22 09:09:50,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:09:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:09:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:50,268 INFO L87 Difference]: Start difference. First operand 235695 states and 351466 transitions. Second operand 3 states. [2020-12-22 09:10:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:13,259 INFO L93 Difference]: Finished difference Result 705831 states and 1052330 transitions. [2020-12-22 09:10:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:13,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-12-22 09:10:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:14,393 INFO L225 Difference]: With dead ends: 705831 [2020-12-22 09:10:14,393 INFO L226 Difference]: Without dead ends: 470819 [2020-12-22 09:10:14,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470819 states. [2020-12-22 09:10:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470819 to 235857. [2020-12-22 09:10:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235857 states. [2020-12-22 09:10:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235857 states to 235857 states and 351652 transitions. [2020-12-22 09:10:31,996 INFO L78 Accepts]: Start accepts. Automaton has 235857 states and 351652 transitions. Word has length 335 [2020-12-22 09:10:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:31,996 INFO L481 AbstractCegarLoop]: Abstraction has 235857 states and 351652 transitions. [2020-12-22 09:10:31,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 235857 states and 351652 transitions. [2020-12-22 09:10:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 09:10:32,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:32,158 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] [2020-12-22 09:10:32,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:10:32,159 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash 422904913, now seen corresponding path program 1 times [2020-12-22 09:10:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851587200] [2020-12-22 09:10:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:10:32,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851587200] [2020-12-22 09:10:32,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:32,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618252760] [2020-12-22 09:10:32,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:32,417 INFO L87 Difference]: Start difference. First operand 235857 states and 351652 transitions. Second operand 3 states. [2020-12-22 09:10:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:54,568 INFO L93 Difference]: Finished difference Result 670483 states and 997658 transitions. [2020-12-22 09:10:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:54,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-12-22 09:10:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:55,504 INFO L225 Difference]: With dead ends: 670483 [2020-12-22 09:10:55,504 INFO L226 Difference]: Without dead ends: 436169 [2020-12-22 09:10:55,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436169 states. [2020-12-22 09:11:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436169 to 436167. [2020-12-22 09:11:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436167 states. [2020-12-22 09:11:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436167 states to 436167 states and 645102 transitions. [2020-12-22 09:11:23,859 INFO L78 Accepts]: Start accepts. Automaton has 436167 states and 645102 transitions. Word has length 336 [2020-12-22 09:11:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:11:23,860 INFO L481 AbstractCegarLoop]: Abstraction has 436167 states and 645102 transitions. [2020-12-22 09:11:23,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:11:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 436167 states and 645102 transitions. [2020-12-22 09:11:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 09:11:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:11:24,489 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] [2020-12-22 09:11:24,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:11:24,489 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:11:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:11:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2066042066, now seen corresponding path program 1 times [2020-12-22 09:11:24,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:11:24,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485701377] [2020-12-22 09:11:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:11:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat