/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/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:21:14,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:21:14,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:21:14,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:21:14,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:21:14,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:21:14,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:21:14,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:21:14,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:21:14,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:21:14,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:21:14,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:21:14,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:21:14,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:21:14,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:21:14,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:21:14,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:21:14,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:21:14,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:21:14,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:21:14,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:21:14,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:21:14,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:21:14,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:21:14,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:21:14,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:21:14,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:21:14,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:21:14,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:21:14,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:21:14,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:21:14,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:21:14,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:21:14,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:21:14,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:21:14,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:21:14,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:21:14,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:21:14,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:21:14,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:21:14,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:21:14,660 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:21:14,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:21:14,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:21:14,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:21:14,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:21:14,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:21:14,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:21:14,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:21:14,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:21:14,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:21:14,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:21:14,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:21:14,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:21:14,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:21:14,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:21:14,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:21:14,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:21:14,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:21:14,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:21:14,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:21:14,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:21:14,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:21:15,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:21:15,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:21:15,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:21:15,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:21:15,189 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:21:15,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:15,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab463012/304cc3ad69f74f0db637c273c720735c/FLAG04b714365 [2020-12-22 07:21:16,113 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:21:16,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:16,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab463012/304cc3ad69f74f0db637c273c720735c/FLAG04b714365 [2020-12-22 07:21:16,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab463012/304cc3ad69f74f0db637c273c720735c [2020-12-22 07:21:16,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:21:16,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:21:16,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:16,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:21:16,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:21:16,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:16" (1/1) ... [2020-12-22 07:21:16,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5fffad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:16, skipping insertion in model container [2020-12-22 07:21:16,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:16" (1/1) ... [2020-12-22 07:21:16,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:21:16,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:21:16,874 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/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2020-12-22 07:21:16,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:16,893 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:21:16,990 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/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2020-12-22 07:21:16,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:17,020 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:21:17,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17 WrapperNode [2020-12-22 07:21:17,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:17,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:17,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:21:17,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:21:17,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:17,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:21:17,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:21:17,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:21:17,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (1/1) ... [2020-12-22 07:21:17,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:21:17,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:21:17,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:21:17,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:21:17,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (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 07:21:17,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:21:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:21:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:21:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:21:19,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:21:19,012 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:21:19,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:19 BoogieIcfgContainer [2020-12-22 07:21:19,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:21:19,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:21:19,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:21:19,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:21:19,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:21:16" (1/3) ... [2020-12-22 07:21:19,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564c9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:19, skipping insertion in model container [2020-12-22 07:21:19,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:17" (2/3) ... [2020-12-22 07:21:19,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564c9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:19, skipping insertion in model container [2020-12-22 07:21:19,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:19" (3/3) ... [2020-12-22 07:21:19,034 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:19,041 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:21:19,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:21:19,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:21:19,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:21:19,110 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:21:19,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:21:19,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:21:19,110 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:21:19,110 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:21:19,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:21:19,111 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:21:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-12-22 07:21:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:19,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:19,152 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] [2020-12-22 07:21:19,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash 883240596, now seen corresponding path program 1 times [2020-12-22 07:21:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:19,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71864159] [2020-12-22 07:21:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:19,765 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 07:21:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71864159] [2020-12-22 07:21:19,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:19,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:21:19,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218671574] [2020-12-22 07:21:19,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:21:19,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:21:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:19,796 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 2 states. [2020-12-22 07:21:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,880 INFO L93 Difference]: Finished difference Result 427 states and 757 transitions. [2020-12-22 07:21:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:21:19,882 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:21:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,899 INFO L225 Difference]: With dead ends: 427 [2020-12-22 07:21:19,899 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:21:19,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:21:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:21:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:21:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 550 transitions. [2020-12-22 07:21:19,974 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 550 transitions. Word has length 77 [2020-12-22 07:21:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:19,975 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 550 transitions. [2020-12-22 07:21:19,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:21:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 550 transitions. [2020-12-22 07:21:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:19,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:19,981 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] [2020-12-22 07:21:19,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:21:19,981 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 749227090, now seen corresponding path program 1 times [2020-12-22 07:21:19,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:19,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212015304] [2020-12-22 07:21:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:20,261 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 07:21:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212015304] [2020-12-22 07:21:20,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:20,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:21:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614993581] [2020-12-22 07:21:20,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:21:20,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:21:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:20,267 INFO L87 Difference]: Start difference. First operand 307 states and 550 transitions. Second operand 5 states. [2020-12-22 07:21:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:20,437 INFO L93 Difference]: Finished difference Result 426 states and 750 transitions. [2020-12-22 07:21:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:21:20,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:21:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:20,446 INFO L225 Difference]: With dead ends: 426 [2020-12-22 07:21:20,446 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:21:20,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:21:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:21:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:21:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 508 transitions. [2020-12-22 07:21:20,499 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 508 transitions. Word has length 77 [2020-12-22 07:21:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:20,499 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 508 transitions. [2020-12-22 07:21:20,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:21:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 508 transitions. [2020-12-22 07:21:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:21:20,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:20,511 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] [2020-12-22 07:21:20,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:21:20,512 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1045938854, now seen corresponding path program 1 times [2020-12-22 07:21:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:20,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362005501] [2020-12-22 07:21:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:20,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362005501] [2020-12-22 07:21:20,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:20,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949865068] [2020-12-22 07:21:20,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:20,772 INFO L87 Difference]: Start difference. First operand 307 states and 508 transitions. Second operand 3 states. [2020-12-22 07:21:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:20,835 INFO L93 Difference]: Finished difference Result 526 states and 879 transitions. [2020-12-22 07:21:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:20,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:21:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:20,839 INFO L225 Difference]: With dead ends: 526 [2020-12-22 07:21:20,840 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 07:21:20,841 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 07:21:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 07:21:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2020-12-22 07:21:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:21:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 675 transitions. [2020-12-22 07:21:20,858 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 675 transitions. Word has length 118 [2020-12-22 07:21:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:20,859 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 675 transitions. [2020-12-22 07:21:20,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 675 transitions. [2020-12-22 07:21:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:20,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:20,861 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] [2020-12-22 07:21:20,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:21:20,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1919052267, now seen corresponding path program 1 times [2020-12-22 07:21:20,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:20,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48072136] [2020-12-22 07:21:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:21,027 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 07:21:21,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48072136] [2020-12-22 07:21:21,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770981269] [2020-12-22 07:21:21,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:21,033 INFO L87 Difference]: Start difference. First operand 408 states and 675 transitions. Second operand 3 states. [2020-12-22 07:21:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:21,084 INFO L93 Difference]: Finished difference Result 822 states and 1367 transitions. [2020-12-22 07:21:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:21,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:21,118 INFO L225 Difference]: With dead ends: 822 [2020-12-22 07:21:21,119 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 07:21:21,122 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 07:21:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 07:21:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 602. [2020-12-22 07:21:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:21:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 997 transitions. [2020-12-22 07:21:21,164 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 997 transitions. Word has length 121 [2020-12-22 07:21:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:21,166 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 997 transitions. [2020-12-22 07:21:21,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 997 transitions. [2020-12-22 07:21:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:21:21,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:21,170 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] [2020-12-22 07:21:21,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:21:21,171 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1777448074, now seen corresponding path program 1 times [2020-12-22 07:21:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:21,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482434951] [2020-12-22 07:21:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:21,379 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 07:21:21,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482434951] [2020-12-22 07:21:21,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:21,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002967124] [2020-12-22 07:21:21,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:21,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:21,383 INFO L87 Difference]: Start difference. First operand 602 states and 997 transitions. Second operand 3 states. [2020-12-22 07:21:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:21,456 INFO L93 Difference]: Finished difference Result 1386 states and 2299 transitions. [2020-12-22 07:21:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:21,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:21:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:21,463 INFO L225 Difference]: With dead ends: 1386 [2020-12-22 07:21:21,464 INFO L226 Difference]: Without dead ends: 976 [2020-12-22 07:21:21,465 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 07:21:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-12-22 07:21:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 970. [2020-12-22 07:21:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-22 07:21:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1601 transitions. [2020-12-22 07:21:21,509 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1601 transitions. Word has length 124 [2020-12-22 07:21:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:21,510 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1601 transitions. [2020-12-22 07:21:21,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1601 transitions. [2020-12-22 07:21:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:21:21,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:21,516 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] [2020-12-22 07:21:21,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:21:21,517 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 78545669, now seen corresponding path program 1 times [2020-12-22 07:21:21,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:21,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081586675] [2020-12-22 07:21:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:21,682 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 07:21:21,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081586675] [2020-12-22 07:21:21,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:21,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:21,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481425628] [2020-12-22 07:21:21,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:21,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:21,687 INFO L87 Difference]: Start difference. First operand 970 states and 1601 transitions. Second operand 3 states. [2020-12-22 07:21:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:21,759 INFO L93 Difference]: Finished difference Result 2454 states and 4043 transitions. [2020-12-22 07:21:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:21,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:21:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:21,770 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:21:21,770 INFO L226 Difference]: Without dead ends: 1676 [2020-12-22 07:21:21,772 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 07:21:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2020-12-22 07:21:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1666. [2020-12-22 07:21:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-12-22 07:21:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2729 transitions. [2020-12-22 07:21:21,849 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2729 transitions. Word has length 127 [2020-12-22 07:21:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2729 transitions. [2020-12-22 07:21:21,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2729 transitions. [2020-12-22 07:21:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:21:21,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:21,853 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] [2020-12-22 07:21:21,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:21:21,853 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash -579836998, now seen corresponding path program 1 times [2020-12-22 07:21:21,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:21,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141925233] [2020-12-22 07:21:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:22,034 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 07:21:22,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141925233] [2020-12-22 07:21:22,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:22,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:22,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244989036] [2020-12-22 07:21:22,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:22,038 INFO L87 Difference]: Start difference. First operand 1666 states and 2729 transitions. Second operand 6 states. [2020-12-22 07:21:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:22,597 INFO L93 Difference]: Finished difference Result 8554 states and 14173 transitions. [2020-12-22 07:21:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:21:22,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:21:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:22,636 INFO L225 Difference]: With dead ends: 8554 [2020-12-22 07:21:22,636 INFO L226 Difference]: Without dead ends: 7080 [2020-12-22 07:21:22,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:21:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2020-12-22 07:21:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 3039. [2020-12-22 07:21:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-12-22 07:21:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4979 transitions. [2020-12-22 07:21:22,796 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4979 transitions. Word has length 130 [2020-12-22 07:21:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:22,797 INFO L481 AbstractCegarLoop]: Abstraction has 3039 states and 4979 transitions. [2020-12-22 07:21:22,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4979 transitions. [2020-12-22 07:21:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:21:22,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:22,801 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] [2020-12-22 07:21:22,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:21:22,801 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1405282905, now seen corresponding path program 1 times [2020-12-22 07:21:22,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:22,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874861438] [2020-12-22 07:21:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:23,024 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 07:21:23,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874861438] [2020-12-22 07:21:23,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:23,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:23,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879510243] [2020-12-22 07:21:23,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:23,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:23,027 INFO L87 Difference]: Start difference. First operand 3039 states and 4979 transitions. Second operand 4 states. [2020-12-22 07:21:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:23,298 INFO L93 Difference]: Finished difference Result 8943 states and 14761 transitions. [2020-12-22 07:21:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:23,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:21:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:23,334 INFO L225 Difference]: With dead ends: 8943 [2020-12-22 07:21:23,334 INFO L226 Difference]: Without dead ends: 6096 [2020-12-22 07:21:23,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2020-12-22 07:21:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 4509. [2020-12-22 07:21:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4509 states. [2020-12-22 07:21:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 7408 transitions. [2020-12-22 07:21:23,562 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 7408 transitions. Word has length 131 [2020-12-22 07:21:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:23,562 INFO L481 AbstractCegarLoop]: Abstraction has 4509 states and 7408 transitions. [2020-12-22 07:21:23,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 7408 transitions. [2020-12-22 07:21:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:21:23,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:23,567 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] [2020-12-22 07:21:23,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:21:23,567 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1311505199, now seen corresponding path program 1 times [2020-12-22 07:21:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:23,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284242404] [2020-12-22 07:21:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:23,683 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 07:21:23,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284242404] [2020-12-22 07:21:23,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:23,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:23,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119237702] [2020-12-22 07:21:23,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:23,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:23,686 INFO L87 Difference]: Start difference. First operand 4509 states and 7408 transitions. Second operand 4 states. [2020-12-22 07:21:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:24,120 INFO L93 Difference]: Finished difference Result 13196 states and 21768 transitions. [2020-12-22 07:21:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:24,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:21:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:24,181 INFO L225 Difference]: With dead ends: 13196 [2020-12-22 07:21:24,181 INFO L226 Difference]: Without dead ends: 8879 [2020-12-22 07:21:24,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:21:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8879 states. [2020-12-22 07:21:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8879 to 6670. [2020-12-22 07:21:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2020-12-22 07:21:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 10951 transitions. [2020-12-22 07:21:24,685 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 10951 transitions. Word has length 132 [2020-12-22 07:21:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:24,685 INFO L481 AbstractCegarLoop]: Abstraction has 6670 states and 10951 transitions. [2020-12-22 07:21:24,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 10951 transitions. [2020-12-22 07:21:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:24,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:24,690 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] [2020-12-22 07:21:24,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:21:24,691 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -547474472, now seen corresponding path program 1 times [2020-12-22 07:21:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:24,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382976289] [2020-12-22 07:21:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:24,789 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 07:21:24,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382976289] [2020-12-22 07:21:24,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:24,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526795270] [2020-12-22 07:21:24,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:24,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:24,792 INFO L87 Difference]: Start difference. First operand 6670 states and 10951 transitions. Second operand 3 states. [2020-12-22 07:21:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:25,102 INFO L93 Difference]: Finished difference Result 14829 states and 24485 transitions. [2020-12-22 07:21:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:25,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:21:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:25,134 INFO L225 Difference]: With dead ends: 14829 [2020-12-22 07:21:25,134 INFO L226 Difference]: Without dead ends: 10255 [2020-12-22 07:21:25,145 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 07:21:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2020-12-22 07:21:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 10253. [2020-12-22 07:21:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10253 states. [2020-12-22 07:21:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 16819 transitions. [2020-12-22 07:21:25,604 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 16819 transitions. Word has length 133 [2020-12-22 07:21:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:25,605 INFO L481 AbstractCegarLoop]: Abstraction has 10253 states and 16819 transitions. [2020-12-22 07:21:25,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 16819 transitions. [2020-12-22 07:21:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:25,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:25,608 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] [2020-12-22 07:21:25,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:21:25,608 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1576389218, now seen corresponding path program 1 times [2020-12-22 07:21:25,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:25,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519173251] [2020-12-22 07:21:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:25,799 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 07:21:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519173251] [2020-12-22 07:21:25,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:25,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300811831] [2020-12-22 07:21:25,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:25,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:25,803 INFO L87 Difference]: Start difference. First operand 10253 states and 16819 transitions. Second operand 3 states. [2020-12-22 07:21:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:26,368 INFO L93 Difference]: Finished difference Result 22652 states and 37216 transitions. [2020-12-22 07:21:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:26,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:21:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,413 INFO L225 Difference]: With dead ends: 22652 [2020-12-22 07:21:26,413 INFO L226 Difference]: Without dead ends: 15630 [2020-12-22 07:21:26,430 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 07:21:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15630 states. [2020-12-22 07:21:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15630 to 15628. [2020-12-22 07:21:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15628 states. [2020-12-22 07:21:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 25522 transitions. [2020-12-22 07:21:27,146 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 25522 transitions. Word has length 133 [2020-12-22 07:21:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:27,146 INFO L481 AbstractCegarLoop]: Abstraction has 15628 states and 25522 transitions. [2020-12-22 07:21:27,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 25522 transitions. [2020-12-22 07:21:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:27,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:27,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:27,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:21:27,150 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash 721034008, now seen corresponding path program 1 times [2020-12-22 07:21:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:27,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721512911] [2020-12-22 07:21:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:27,279 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 07:21:27,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721512911] [2020-12-22 07:21:27,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:27,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175018578] [2020-12-22 07:21:27,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:27,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:27,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,284 INFO L87 Difference]: Start difference. First operand 15628 states and 25522 transitions. Second operand 3 states. [2020-12-22 07:21:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:28,002 INFO L93 Difference]: Finished difference Result 30486 states and 49905 transitions. [2020-12-22 07:21:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:28,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:21:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:28,060 INFO L225 Difference]: With dead ends: 30486 [2020-12-22 07:21:28,060 INFO L226 Difference]: Without dead ends: 21963 [2020-12-22 07:21:28,157 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 07:21:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21963 states. [2020-12-22 07:21:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21963 to 21961. [2020-12-22 07:21:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21961 states. [2020-12-22 07:21:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21961 states to 21961 states and 35721 transitions. [2020-12-22 07:21:29,103 INFO L78 Accepts]: Start accepts. Automaton has 21961 states and 35721 transitions. Word has length 133 [2020-12-22 07:21:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:29,104 INFO L481 AbstractCegarLoop]: Abstraction has 21961 states and 35721 transitions. [2020-12-22 07:21:29,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21961 states and 35721 transitions. [2020-12-22 07:21:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:29,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:29,106 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] [2020-12-22 07:21:29,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:21:29,106 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash 536413840, now seen corresponding path program 1 times [2020-12-22 07:21:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:29,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409573098] [2020-12-22 07:21:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:29,255 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 07:21:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409573098] [2020-12-22 07:21:29,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:29,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:29,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953954092] [2020-12-22 07:21:29,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:29,258 INFO L87 Difference]: Start difference. First operand 21961 states and 35721 transitions. Second operand 4 states. [2020-12-22 07:21:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:30,905 INFO L93 Difference]: Finished difference Result 70938 states and 115706 transitions. [2020-12-22 07:21:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:30,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:21:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:31,071 INFO L225 Difference]: With dead ends: 70938 [2020-12-22 07:21:31,071 INFO L226 Difference]: Without dead ends: 49197 [2020-12-22 07:21:31,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:21:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49197 states. [2020-12-22 07:21:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49197 to 35486. [2020-12-22 07:21:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35486 states. [2020-12-22 07:21:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 57573 transitions. [2020-12-22 07:21:32,846 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 57573 transitions. Word has length 133 [2020-12-22 07:21:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:32,846 INFO L481 AbstractCegarLoop]: Abstraction has 35486 states and 57573 transitions. [2020-12-22 07:21:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 57573 transitions. [2020-12-22 07:21:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:32,849 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] [2020-12-22 07:21:32,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:21:32,849 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1673295070, now seen corresponding path program 1 times [2020-12-22 07:21:32,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:32,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476660367] [2020-12-22 07:21:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:32,978 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 07:21:32,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476660367] [2020-12-22 07:21:32,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:32,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:32,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093375852] [2020-12-22 07:21:32,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:32,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:32,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:32,982 INFO L87 Difference]: Start difference. First operand 35486 states and 57573 transitions. Second operand 3 states. [2020-12-22 07:21:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:34,526 INFO L93 Difference]: Finished difference Result 69604 states and 113196 transitions. [2020-12-22 07:21:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:34,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:21:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:34,691 INFO L225 Difference]: With dead ends: 69604 [2020-12-22 07:21:34,691 INFO L226 Difference]: Without dead ends: 49801 [2020-12-22 07:21:34,741 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 07:21:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49801 states. [2020-12-22 07:21:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49801 to 49799. [2020-12-22 07:21:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49799 states. [2020-12-22 07:21:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49799 states to 49799 states and 80392 transitions. [2020-12-22 07:21:36,666 INFO L78 Accepts]: Start accepts. Automaton has 49799 states and 80392 transitions. Word has length 133 [2020-12-22 07:21:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:36,667 INFO L481 AbstractCegarLoop]: Abstraction has 49799 states and 80392 transitions. [2020-12-22 07:21:36,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 49799 states and 80392 transitions. [2020-12-22 07:21:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:21:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:36,669 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] [2020-12-22 07:21:36,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:21:36,670 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2138633752, now seen corresponding path program 1 times [2020-12-22 07:21:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:36,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621235908] [2020-12-22 07:21:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:36,917 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 07:21:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621235908] [2020-12-22 07:21:36,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:36,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788045080] [2020-12-22 07:21:36,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:36,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:36,920 INFO L87 Difference]: Start difference. First operand 49799 states and 80392 transitions. Second operand 4 states. [2020-12-22 07:21:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:39,284 INFO L93 Difference]: Finished difference Result 160333 states and 259541 transitions. [2020-12-22 07:21:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:39,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:21:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:39,592 INFO L225 Difference]: With dead ends: 160333 [2020-12-22 07:21:39,592 INFO L226 Difference]: Without dead ends: 110767 [2020-12-22 07:21:39,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:21:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110767 states. [2020-12-22 07:21:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110767 to 80058. [2020-12-22 07:21:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:21:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128840 transitions. [2020-12-22 07:21:42,900 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128840 transitions. Word has length 134 [2020-12-22 07:21:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:42,901 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128840 transitions. [2020-12-22 07:21:42,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128840 transitions. [2020-12-22 07:21:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:21:42,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:42,902 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] [2020-12-22 07:21:42,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:21:42,903 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:42,904 INFO L82 PathProgramCache]: Analyzing trace with hash -153851200, now seen corresponding path program 1 times [2020-12-22 07:21:42,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:42,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998250183] [2020-12-22 07:21:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:43,098 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 07:21:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998250183] [2020-12-22 07:21:43,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:43,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471184664] [2020-12-22 07:21:43,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:43,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:43,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:43,101 INFO L87 Difference]: Start difference. First operand 80058 states and 128840 transitions. Second operand 6 states. [2020-12-22 07:21:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:45,685 INFO L93 Difference]: Finished difference Result 159885 states and 257310 transitions. [2020-12-22 07:21:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:45,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:21:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:45,850 INFO L225 Difference]: With dead ends: 159885 [2020-12-22 07:21:45,850 INFO L226 Difference]: Without dead ends: 80060 [2020-12-22 07:21:45,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:21:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80060 states. [2020-12-22 07:21:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80060 to 80058. [2020-12-22 07:21:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:21:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128215 transitions. [2020-12-22 07:21:48,694 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128215 transitions. Word has length 136 [2020-12-22 07:21:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:48,695 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128215 transitions. [2020-12-22 07:21:48,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128215 transitions. [2020-12-22 07:21:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:21:48,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:48,697 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] [2020-12-22 07:21:48,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:21:48,697 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1698314093, now seen corresponding path program 1 times [2020-12-22 07:21:48,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:48,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4044193] [2020-12-22 07:21:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:48,965 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 07:21:48,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4044193] [2020-12-22 07:21:48,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:48,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834567001] [2020-12-22 07:21:48,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:48,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:48,969 INFO L87 Difference]: Start difference. First operand 80058 states and 128215 transitions. Second operand 4 states. [2020-12-22 07:21:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:53,164 INFO L93 Difference]: Finished difference Result 238287 states and 381573 transitions. [2020-12-22 07:21:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:53,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:21:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:53,493 INFO L225 Difference]: With dead ends: 238287 [2020-12-22 07:21:53,493 INFO L226 Difference]: Without dead ends: 158240 [2020-12-22 07:21:53,593 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 07:21:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158240 states. [2020-12-22 07:21:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158240 to 158238. [2020-12-22 07:21:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158238 states. [2020-12-22 07:21:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158238 states to 158238 states and 252200 transitions. [2020-12-22 07:21:58,709 INFO L78 Accepts]: Start accepts. Automaton has 158238 states and 252200 transitions. Word has length 139 [2020-12-22 07:21:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:58,709 INFO L481 AbstractCegarLoop]: Abstraction has 158238 states and 252200 transitions. [2020-12-22 07:21:58,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 158238 states and 252200 transitions. [2020-12-22 07:21:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:21:58,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:58,711 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] [2020-12-22 07:21:58,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:58,711 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1498816216, now seen corresponding path program 1 times [2020-12-22 07:21:58,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:58,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260991727] [2020-12-22 07:21:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:59,220 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 07:21:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260991727] [2020-12-22 07:21:59,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:59,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:59,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155444382] [2020-12-22 07:21:59,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:59,228 INFO L87 Difference]: Start difference. First operand 158238 states and 252200 transitions. Second operand 4 states. [2020-12-22 07:22:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:06,898 INFO L93 Difference]: Finished difference Result 470952 states and 750479 transitions. [2020-12-22 07:22:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:06,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:22:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:07,758 INFO L225 Difference]: With dead ends: 470952 [2020-12-22 07:22:07,758 INFO L226 Difference]: Without dead ends: 312726 [2020-12-22 07:22:07,904 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 07:22:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312726 states. [2020-12-22 07:22:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312726 to 312724. [2020-12-22 07:22:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312724 states. [2020-12-22 07:22:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312724 states to 312724 states and 495946 transitions. [2020-12-22 07:22:18,534 INFO L78 Accepts]: Start accepts. Automaton has 312724 states and 495946 transitions. Word has length 141 [2020-12-22 07:22:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:18,534 INFO L481 AbstractCegarLoop]: Abstraction has 312724 states and 495946 transitions. [2020-12-22 07:22:18,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 312724 states and 495946 transitions. [2020-12-22 07:22:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:22:18,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:18,548 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] [2020-12-22 07:22:18,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:22:18,549 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -200929965, now seen corresponding path program 1 times [2020-12-22 07:22:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:18,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395808318] [2020-12-22 07:22:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:18,858 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 07:22:18,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395808318] [2020-12-22 07:22:18,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:18,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021385113] [2020-12-22 07:22:18,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:18,862 INFO L87 Difference]: Start difference. First operand 312724 states and 495946 transitions. Second operand 4 states. [2020-12-22 07:22:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:36,548 INFO L93 Difference]: Finished difference Result 930649 states and 1475599 transitions. [2020-12-22 07:22:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:36,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:22:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:38,344 INFO L225 Difference]: With dead ends: 930649 [2020-12-22 07:22:38,344 INFO L226 Difference]: Without dead ends: 617952 [2020-12-22 07:22:38,699 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 07:22:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617952 states. [2020-12-22 07:23:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617952 to 617950. [2020-12-22 07:23:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617950 states. [2020-12-22 07:23:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617950 states to 617950 states and 974995 transitions. [2020-12-22 07:23:06,267 INFO L78 Accepts]: Start accepts. Automaton has 617950 states and 974995 transitions. Word has length 143 [2020-12-22 07:23:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:06,270 INFO L481 AbstractCegarLoop]: Abstraction has 617950 states and 974995 transitions. [2020-12-22 07:23:06,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 617950 states and 974995 transitions. [2020-12-22 07:23:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:23:06,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:06,285 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] [2020-12-22 07:23:06,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:23:06,285 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:06,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1235528920, now seen corresponding path program 1 times [2020-12-22 07:23:06,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:06,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721752051] [2020-12-22 07:23:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:06,582 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 07:23:06,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721752051] [2020-12-22 07:23:06,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:06,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863397178] [2020-12-22 07:23:06,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:06,585 INFO L87 Difference]: Start difference. First operand 617950 states and 974995 transitions. Second operand 4 states. [2020-12-22 07:23:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:49,912 INFO L93 Difference]: Finished difference Result 1838642 states and 2900233 transitions. [2020-12-22 07:23:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:49,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:23:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:53,790 INFO L225 Difference]: With dead ends: 1838642 [2020-12-22 07:23:53,791 INFO L226 Difference]: Without dead ends: 1220828 [2020-12-22 07:23:54,485 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 07:23:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220828 states.