/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:19:24,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:19:24,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:19:24,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:19:24,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:19:24,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:19:24,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:19:24,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:19:24,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:19:24,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:19:24,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:19:24,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:19:24,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:19:24,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:19:24,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:19:24,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:19:24,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:19:24,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:19:24,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:19:24,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:19:24,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:19:24,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:19:24,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:19:24,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:19:24,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:19:24,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:19:24,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:19:24,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:19:24,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:19:24,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:19:24,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:19:24,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:19:24,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:19:24,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:19:24,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:19:24,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:19:24,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:19:24,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:19:24,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:19:24,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:19:24,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:19:24,450 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:19:24,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:19:24,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:19:24,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:19:24,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:19:24,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:19:24,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:19:24,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:19:24,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:19:24,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:19:24,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:19:24,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:19:24,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:19:24,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:19:24,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:19:24,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:19:24,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:19:24,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:19:24,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:19:24,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:19:24,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:19:24,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:19:24,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:19:25,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:19:25,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:19:25,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:19:25,031 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:19:25,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:19:25,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b8bec1f/83b6ad0dab004b239510227697c21b1e/FLAG7f2f5175f [2020-12-22 08:19:25,751 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:19:25,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:19:25,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b8bec1f/83b6ad0dab004b239510227697c21b1e/FLAG7f2f5175f [2020-12-22 08:19:26,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b8bec1f/83b6ad0dab004b239510227697c21b1e [2020-12-22 08:19:26,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:19:26,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:19:26,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:26,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:19:26,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:19:26,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9044f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26, skipping insertion in model container [2020-12-22 08:19:26,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:19:26,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:19:26,371 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7065,7078] [2020-12-22 08:19:26,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:26,489 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:19:26,548 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7065,7078] [2020-12-22 08:19:26,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:26,610 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:19:26,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26 WrapperNode [2020-12-22 08:19:26,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:26,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:26,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:19:26,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:19:26,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:26,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:19:26,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:19:26,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:19:26,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (1/1) ... [2020-12-22 08:19:26,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:19:26,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:19:26,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:19:26,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:19:26,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (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 08:19:26,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:19:26,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:19:26,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:19:26,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:19:27,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:19:27,886 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:19:27,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:27 BoogieIcfgContainer [2020-12-22 08:19:27,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:19:27,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:19:27,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:19:27,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:19:27,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:19:26" (1/3) ... [2020-12-22 08:19:27,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223a3386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:27, skipping insertion in model container [2020-12-22 08:19:27,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:26" (2/3) ... [2020-12-22 08:19:27,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223a3386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:27, skipping insertion in model container [2020-12-22 08:19:27,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:27" (3/3) ... [2020-12-22 08:19:27,898 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:19:27,905 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:19:27,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:19:27,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:19:27,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:19:27,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:19:27,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:19:27,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:19:27,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:19:27,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:19:27,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:19:27,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:19:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-12-22 08:19:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:19:27,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:27,991 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] [2020-12-22 08:19:27,992 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash 985312972, now seen corresponding path program 1 times [2020-12-22 08:19:28,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:28,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235180099] [2020-12-22 08:19:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:28,472 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 08:19:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235180099] [2020-12-22 08:19:28,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:28,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:28,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344540288] [2020-12-22 08:19:28,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:28,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:28,497 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 3 states. [2020-12-22 08:19:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:28,615 INFO L93 Difference]: Finished difference Result 310 states and 504 transitions. [2020-12-22 08:19:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:28,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:19:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:28,632 INFO L225 Difference]: With dead ends: 310 [2020-12-22 08:19:28,633 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 08:19:28,636 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 08:19:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 08:19:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2020-12-22 08:19:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 08:19:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 349 transitions. [2020-12-22 08:19:28,767 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 349 transitions. Word has length 50 [2020-12-22 08:19:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:28,768 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 349 transitions. [2020-12-22 08:19:28,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 349 transitions. [2020-12-22 08:19:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:19:28,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:28,771 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] [2020-12-22 08:19:28,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:19:28,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash -722006169, now seen corresponding path program 1 times [2020-12-22 08:19:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:28,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744315836] [2020-12-22 08:19:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:28,997 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 08:19:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744315836] [2020-12-22 08:19:28,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:28,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:28,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901228458] [2020-12-22 08:19:29,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:29,007 INFO L87 Difference]: Start difference. First operand 235 states and 349 transitions. Second operand 3 states. [2020-12-22 08:19:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:29,143 INFO L93 Difference]: Finished difference Result 574 states and 871 transitions. [2020-12-22 08:19:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:29,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:19:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:29,152 INFO L225 Difference]: With dead ends: 574 [2020-12-22 08:19:29,153 INFO L226 Difference]: Without dead ends: 397 [2020-12-22 08:19:29,157 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 08:19:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-22 08:19:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-12-22 08:19:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 08:19:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 586 transitions. [2020-12-22 08:19:29,242 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 586 transitions. Word has length 53 [2020-12-22 08:19:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,242 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 586 transitions. [2020-12-22 08:19:29,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 586 transitions. [2020-12-22 08:19:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:19:29,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,245 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] [2020-12-22 08:19:29,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:19:29,246 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash -695460410, now seen corresponding path program 1 times [2020-12-22 08:19:29,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726004243] [2020-12-22 08:19:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:29,363 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 08:19:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726004243] [2020-12-22 08:19:29,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:29,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83428029] [2020-12-22 08:19:29,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:29,367 INFO L87 Difference]: Start difference. First operand 395 states and 586 transitions. Second operand 3 states. [2020-12-22 08:19:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:29,458 INFO L93 Difference]: Finished difference Result 979 states and 1471 transitions. [2020-12-22 08:19:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:29,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:19:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:29,464 INFO L225 Difference]: With dead ends: 979 [2020-12-22 08:19:29,464 INFO L226 Difference]: Without dead ends: 684 [2020-12-22 08:19:29,467 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 08:19:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-12-22 08:19:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2020-12-22 08:19:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-12-22 08:19:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1004 transitions. [2020-12-22 08:19:29,535 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1004 transitions. Word has length 53 [2020-12-22 08:19:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,542 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1004 transitions. [2020-12-22 08:19:29,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1004 transitions. [2020-12-22 08:19:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:19:29,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,549 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] [2020-12-22 08:19:29,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:19:29,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -272648633, now seen corresponding path program 1 times [2020-12-22 08:19:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383637236] [2020-12-22 08:19:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:29,730 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 08:19:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383637236] [2020-12-22 08:19:29,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:29,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364648359] [2020-12-22 08:19:29,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:29,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:29,733 INFO L87 Difference]: Start difference. First operand 682 states and 1004 transitions. Second operand 3 states. [2020-12-22 08:19:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:29,825 INFO L93 Difference]: Finished difference Result 1668 states and 2468 transitions. [2020-12-22 08:19:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:29,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:19:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:29,832 INFO L225 Difference]: With dead ends: 1668 [2020-12-22 08:19:29,833 INFO L226 Difference]: Without dead ends: 1170 [2020-12-22 08:19:29,834 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 08:19:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-12-22 08:19:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1168. [2020-12-22 08:19:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-12-22 08:19:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1691 transitions. [2020-12-22 08:19:29,918 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1691 transitions. Word has length 53 [2020-12-22 08:19:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,918 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1691 transitions. [2020-12-22 08:19:29,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1691 transitions. [2020-12-22 08:19:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:29,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,927 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] [2020-12-22 08:19:29,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:19:29,927 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1724922721, now seen corresponding path program 1 times [2020-12-22 08:19:29,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156947466] [2020-12-22 08:19:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:30,106 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 08:19:30,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156947466] [2020-12-22 08:19:30,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:30,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:19:30,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002769960] [2020-12-22 08:19:30,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:30,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:30,111 INFO L87 Difference]: Start difference. First operand 1168 states and 1691 transitions. Second operand 5 states. [2020-12-22 08:19:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:30,543 INFO L93 Difference]: Finished difference Result 2786 states and 4039 transitions. [2020-12-22 08:19:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:30,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:19:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:30,555 INFO L225 Difference]: With dead ends: 2786 [2020-12-22 08:19:30,555 INFO L226 Difference]: Without dead ends: 1646 [2020-12-22 08:19:30,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2020-12-22 08:19:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1632. [2020-12-22 08:19:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2020-12-22 08:19:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2341 transitions. [2020-12-22 08:19:30,679 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2341 transitions. Word has length 54 [2020-12-22 08:19:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:30,679 INFO L481 AbstractCegarLoop]: Abstraction has 1632 states and 2341 transitions. [2020-12-22 08:19:30,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2341 transitions. [2020-12-22 08:19:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:30,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:30,681 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] [2020-12-22 08:19:30,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:19:30,682 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1943574737, now seen corresponding path program 1 times [2020-12-22 08:19:30,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:30,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753891853] [2020-12-22 08:19:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753891853] [2020-12-22 08:19:30,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:30,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:30,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471858427] [2020-12-22 08:19:30,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:30,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:30,812 INFO L87 Difference]: Start difference. First operand 1632 states and 2341 transitions. Second operand 5 states. [2020-12-22 08:19:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:31,179 INFO L93 Difference]: Finished difference Result 5227 states and 7600 transitions. [2020-12-22 08:19:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:31,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:19:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:31,203 INFO L225 Difference]: With dead ends: 5227 [2020-12-22 08:19:31,204 INFO L226 Difference]: Without dead ends: 4169 [2020-12-22 08:19:31,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2020-12-22 08:19:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 1951. [2020-12-22 08:19:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1951 states. [2020-12-22 08:19:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2810 transitions. [2020-12-22 08:19:31,388 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2810 transitions. Word has length 54 [2020-12-22 08:19:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:31,388 INFO L481 AbstractCegarLoop]: Abstraction has 1951 states and 2810 transitions. [2020-12-22 08:19:31,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2810 transitions. [2020-12-22 08:19:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:31,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:31,391 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] [2020-12-22 08:19:31,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:19:31,391 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash -867408349, now seen corresponding path program 1 times [2020-12-22 08:19:31,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:31,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151220300] [2020-12-22 08:19:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:31,512 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 08:19:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151220300] [2020-12-22 08:19:31,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:31,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:31,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877235714] [2020-12-22 08:19:31,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:31,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:31,526 INFO L87 Difference]: Start difference. First operand 1951 states and 2810 transitions. Second operand 6 states. [2020-12-22 08:19:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:32,171 INFO L93 Difference]: Finished difference Result 5990 states and 8639 transitions. [2020-12-22 08:19:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:32,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:19:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:32,192 INFO L225 Difference]: With dead ends: 5990 [2020-12-22 08:19:32,192 INFO L226 Difference]: Without dead ends: 4121 [2020-12-22 08:19:32,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2020-12-22 08:19:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 4087. [2020-12-22 08:19:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4087 states. [2020-12-22 08:19:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 5867 transitions. [2020-12-22 08:19:32,524 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 5867 transitions. Word has length 54 [2020-12-22 08:19:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:32,525 INFO L481 AbstractCegarLoop]: Abstraction has 4087 states and 5867 transitions. [2020-12-22 08:19:32,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 5867 transitions. [2020-12-22 08:19:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:19:32,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:32,528 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] [2020-12-22 08:19:32,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:19:32,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash 478354003, now seen corresponding path program 1 times [2020-12-22 08:19:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:32,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691468596] [2020-12-22 08:19:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:32,663 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 08:19:32,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691468596] [2020-12-22 08:19:32,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:32,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:32,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078453972] [2020-12-22 08:19:32,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:32,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:32,666 INFO L87 Difference]: Start difference. First operand 4087 states and 5867 transitions. Second operand 5 states. [2020-12-22 08:19:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:33,407 INFO L93 Difference]: Finished difference Result 12604 states and 18211 transitions. [2020-12-22 08:19:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:33,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:19:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:33,457 INFO L225 Difference]: With dead ends: 12604 [2020-12-22 08:19:33,457 INFO L226 Difference]: Without dead ends: 10064 [2020-12-22 08:19:33,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10064 states. [2020-12-22 08:19:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10064 to 4904. [2020-12-22 08:19:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4904 states. [2020-12-22 08:19:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 7077 transitions. [2020-12-22 08:19:33,988 INFO L78 Accepts]: Start accepts. Automaton has 4904 states and 7077 transitions. Word has length 55 [2020-12-22 08:19:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:33,989 INFO L481 AbstractCegarLoop]: Abstraction has 4904 states and 7077 transitions. [2020-12-22 08:19:33,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4904 states and 7077 transitions. [2020-12-22 08:19:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:19:33,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:33,992 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] [2020-12-22 08:19:33,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:19:33,992 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1521002867, now seen corresponding path program 1 times [2020-12-22 08:19:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:33,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276335632] [2020-12-22 08:19:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:34,102 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 08:19:34,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276335632] [2020-12-22 08:19:34,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:34,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782838976] [2020-12-22 08:19:34,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:34,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:34,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:34,106 INFO L87 Difference]: Start difference. First operand 4904 states and 7077 transitions. Second operand 5 states. [2020-12-22 08:19:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:34,860 INFO L93 Difference]: Finished difference Result 12828 states and 18545 transitions. [2020-12-22 08:19:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:34,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:19:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:34,913 INFO L225 Difference]: With dead ends: 12828 [2020-12-22 08:19:34,913 INFO L226 Difference]: Without dead ends: 10288 [2020-12-22 08:19:34,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10288 states. [2020-12-22 08:19:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10288 to 5922. [2020-12-22 08:19:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5922 states. [2020-12-22 08:19:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5922 states to 5922 states and 8561 transitions. [2020-12-22 08:19:35,502 INFO L78 Accepts]: Start accepts. Automaton has 5922 states and 8561 transitions. Word has length 55 [2020-12-22 08:19:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 5922 states and 8561 transitions. [2020-12-22 08:19:35,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5922 states and 8561 transitions. [2020-12-22 08:19:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:19:35,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:35,506 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] [2020-12-22 08:19:35,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:19:35,506 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1320055476, now seen corresponding path program 1 times [2020-12-22 08:19:35,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:35,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052894860] [2020-12-22 08:19:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:35,602 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 08:19:35,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052894860] [2020-12-22 08:19:35,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:35,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:35,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989618178] [2020-12-22 08:19:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:35,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:35,605 INFO L87 Difference]: Start difference. First operand 5922 states and 8561 transitions. Second operand 6 states. [2020-12-22 08:19:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:36,919 INFO L93 Difference]: Finished difference Result 18781 states and 27120 transitions. [2020-12-22 08:19:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:36,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-12-22 08:19:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:36,947 INFO L225 Difference]: With dead ends: 18781 [2020-12-22 08:19:36,947 INFO L226 Difference]: Without dead ends: 12905 [2020-12-22 08:19:36,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12905 states. [2020-12-22 08:19:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12905 to 12815. [2020-12-22 08:19:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12815 states. [2020-12-22 08:19:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12815 states to 12815 states and 18415 transitions. [2020-12-22 08:19:37,895 INFO L78 Accepts]: Start accepts. Automaton has 12815 states and 18415 transitions. Word has length 59 [2020-12-22 08:19:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:37,895 INFO L481 AbstractCegarLoop]: Abstraction has 12815 states and 18415 transitions. [2020-12-22 08:19:37,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 12815 states and 18415 transitions. [2020-12-22 08:19:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:19:37,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:37,905 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] [2020-12-22 08:19:37,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:19:37,905 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:37,906 INFO L82 PathProgramCache]: Analyzing trace with hash -97252013, now seen corresponding path program 1 times [2020-12-22 08:19:37,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:37,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783479438] [2020-12-22 08:19:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:37,997 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 08:19:37,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783479438] [2020-12-22 08:19:37,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:37,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:37,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893851812] [2020-12-22 08:19:37,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:38,000 INFO L87 Difference]: Start difference. First operand 12815 states and 18415 transitions. Second operand 7 states. [2020-12-22 08:19:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:41,413 INFO L93 Difference]: Finished difference Result 48274 states and 68887 transitions. [2020-12-22 08:19:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:41,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:19:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:41,506 INFO L225 Difference]: With dead ends: 48274 [2020-12-22 08:19:41,507 INFO L226 Difference]: Without dead ends: 42632 [2020-12-22 08:19:41,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42632 states. [2020-12-22 08:19:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42632 to 12835. [2020-12-22 08:19:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2020-12-22 08:19:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 18439 transitions. [2020-12-22 08:19:42,809 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 18439 transitions. Word has length 60 [2020-12-22 08:19:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:42,810 INFO L481 AbstractCegarLoop]: Abstraction has 12835 states and 18439 transitions. [2020-12-22 08:19:42,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 18439 transitions. [2020-12-22 08:19:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:19:42,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:42,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:42,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:19:42,816 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -172891724, now seen corresponding path program 1 times [2020-12-22 08:19:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:42,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311518549] [2020-12-22 08:19:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:42,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311518549] [2020-12-22 08:19:42,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:42,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537175082] [2020-12-22 08:19:42,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:42,913 INFO L87 Difference]: Start difference. First operand 12835 states and 18439 transitions. Second operand 7 states. [2020-12-22 08:19:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:48,001 INFO L93 Difference]: Finished difference Result 56457 states and 80602 transitions. [2020-12-22 08:19:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:48,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:19:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:48,113 INFO L225 Difference]: With dead ends: 56457 [2020-12-22 08:19:48,113 INFO L226 Difference]: Without dead ends: 50947 [2020-12-22 08:19:48,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50947 states. [2020-12-22 08:19:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50947 to 12929. [2020-12-22 08:19:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12929 states. [2020-12-22 08:19:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12929 states to 12929 states and 18560 transitions. [2020-12-22 08:19:49,758 INFO L78 Accepts]: Start accepts. Automaton has 12929 states and 18560 transitions. Word has length 60 [2020-12-22 08:19:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:49,758 INFO L481 AbstractCegarLoop]: Abstraction has 12929 states and 18560 transitions. [2020-12-22 08:19:49,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12929 states and 18560 transitions. [2020-12-22 08:19:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:19:49,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:49,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:49,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:19:49,764 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2054897963, now seen corresponding path program 1 times [2020-12-22 08:19:49,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:49,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371818108] [2020-12-22 08:19:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:49,853 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 08:19:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371818108] [2020-12-22 08:19:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492988327] [2020-12-22 08:19:49,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:49,856 INFO L87 Difference]: Start difference. First operand 12929 states and 18560 transitions. Second operand 7 states. [2020-12-22 08:19:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:57,391 INFO L93 Difference]: Finished difference Result 74242 states and 106062 transitions. [2020-12-22 08:19:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:57,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:19:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:57,579 INFO L225 Difference]: With dead ends: 74242 [2020-12-22 08:19:57,580 INFO L226 Difference]: Without dead ends: 67792 [2020-12-22 08:19:57,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67792 states. [2020-12-22 08:19:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67792 to 12985. [2020-12-22 08:19:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12985 states. [2020-12-22 08:19:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12985 states to 12985 states and 18629 transitions. [2020-12-22 08:19:59,493 INFO L78 Accepts]: Start accepts. Automaton has 12985 states and 18629 transitions. Word has length 60 [2020-12-22 08:19:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:59,494 INFO L481 AbstractCegarLoop]: Abstraction has 12985 states and 18629 transitions. [2020-12-22 08:19:59,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12985 states and 18629 transitions. [2020-12-22 08:19:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:59,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:59,499 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] [2020-12-22 08:19:59,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:19:59,499 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1036507303, now seen corresponding path program 1 times [2020-12-22 08:19:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:59,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363245951] [2020-12-22 08:19:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:59,767 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 08:19:59,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363245951] [2020-12-22 08:19:59,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:59,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:19:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517707298] [2020-12-22 08:19:59,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:19:59,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:19:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:19:59,770 INFO L87 Difference]: Start difference. First operand 12985 states and 18629 transitions. Second operand 10 states. [2020-12-22 08:20:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:05,814 INFO L93 Difference]: Finished difference Result 43843 states and 62730 transitions. [2020-12-22 08:20:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:20:05,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:20:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:05,860 INFO L225 Difference]: With dead ends: 43843 [2020-12-22 08:20:05,860 INFO L226 Difference]: Without dead ends: 32480 [2020-12-22 08:20:05,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:20:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32480 states. [2020-12-22 08:20:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32480 to 12812. [2020-12-22 08:20:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12812 states. [2020-12-22 08:20:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12812 states to 12812 states and 18369 transitions. [2020-12-22 08:20:07,668 INFO L78 Accepts]: Start accepts. Automaton has 12812 states and 18369 transitions. Word has length 62 [2020-12-22 08:20:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 12812 states and 18369 transitions. [2020-12-22 08:20:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:20:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12812 states and 18369 transitions. [2020-12-22 08:20:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:20:07,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:07,673 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] [2020-12-22 08:20:07,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:20:07,674 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1459319080, now seen corresponding path program 1 times [2020-12-22 08:20:07,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317478746] [2020-12-22 08:20:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:07,850 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 08:20:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317478746] [2020-12-22 08:20:07,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:07,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:20:07,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396007503] [2020-12-22 08:20:07,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:20:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:20:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:20:07,853 INFO L87 Difference]: Start difference. First operand 12812 states and 18369 transitions. Second operand 10 states. [2020-12-22 08:20:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:17,880 INFO L93 Difference]: Finished difference Result 71427 states and 101759 transitions. [2020-12-22 08:20:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:20:17,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:20:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:17,945 INFO L225 Difference]: With dead ends: 71427 [2020-12-22 08:20:17,945 INFO L226 Difference]: Without dead ends: 60011 [2020-12-22 08:20:17,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:20:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60011 states. [2020-12-22 08:20:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60011 to 12635. [2020-12-22 08:20:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12635 states. [2020-12-22 08:20:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12635 states to 12635 states and 18109 transitions. [2020-12-22 08:20:20,049 INFO L78 Accepts]: Start accepts. Automaton has 12635 states and 18109 transitions. Word has length 62 [2020-12-22 08:20:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:20,049 INFO L481 AbstractCegarLoop]: Abstraction has 12635 states and 18109 transitions. [2020-12-22 08:20:20,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:20:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12635 states and 18109 transitions. [2020-12-22 08:20:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:20:20,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:20,053 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] [2020-12-22 08:20:20,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:20:20,054 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2010042985, now seen corresponding path program 1 times [2020-12-22 08:20:20,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:20,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990060192] [2020-12-22 08:20:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:20,256 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 08:20:20,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990060192] [2020-12-22 08:20:20,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:20,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:20:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326112475] [2020-12-22 08:20:20,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:20:20,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:20:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:20:20,258 INFO L87 Difference]: Start difference. First operand 12635 states and 18109 transitions. Second operand 10 states. [2020-12-22 08:20:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:27,374 INFO L93 Difference]: Finished difference Result 43669 states and 62417 transitions. [2020-12-22 08:20:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:20:27,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:20:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:27,410 INFO L225 Difference]: With dead ends: 43669 [2020-12-22 08:20:27,410 INFO L226 Difference]: Without dead ends: 32107 [2020-12-22 08:20:27,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:20:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32107 states. [2020-12-22 08:20:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32107 to 12443. [2020-12-22 08:20:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12443 states. [2020-12-22 08:20:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12443 states to 12443 states and 17850 transitions. [2020-12-22 08:20:29,439 INFO L78 Accepts]: Start accepts. Automaton has 12443 states and 17850 transitions. Word has length 62 [2020-12-22 08:20:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 12443 states and 17850 transitions. [2020-12-22 08:20:29,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:20:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 12443 states and 17850 transitions. [2020-12-22 08:20:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:29,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:29,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:20:29,443 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1983119998, now seen corresponding path program 1 times [2020-12-22 08:20:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:29,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69703052] [2020-12-22 08:20:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:29,505 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 08:20:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69703052] [2020-12-22 08:20:29,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:29,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617066876] [2020-12-22 08:20:29,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:29,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:29,508 INFO L87 Difference]: Start difference. First operand 12443 states and 17850 transitions. Second operand 3 states. [2020-12-22 08:20:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:31,662 INFO L93 Difference]: Finished difference Result 18887 states and 27050 transitions. [2020-12-22 08:20:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:31,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:20:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:31,676 INFO L225 Difference]: With dead ends: 18887 [2020-12-22 08:20:31,676 INFO L226 Difference]: Without dead ends: 12312 [2020-12-22 08:20:31,684 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 08:20:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12312 states. [2020-12-22 08:20:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12312 to 12310. [2020-12-22 08:20:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12310 states. [2020-12-22 08:20:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12310 states to 12310 states and 17394 transitions. [2020-12-22 08:20:33,596 INFO L78 Accepts]: Start accepts. Automaton has 12310 states and 17394 transitions. Word has length 63 [2020-12-22 08:20:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:33,596 INFO L481 AbstractCegarLoop]: Abstraction has 12310 states and 17394 transitions. [2020-12-22 08:20:33,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 12310 states and 17394 transitions. [2020-12-22 08:20:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:33,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:33,599 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] [2020-12-22 08:20:33,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:20:33,600 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1051173576, now seen corresponding path program 1 times [2020-12-22 08:20:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:33,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836693094] [2020-12-22 08:20:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:33,648 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 08:20:33,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836693094] [2020-12-22 08:20:33,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:33,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138560249] [2020-12-22 08:20:33,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:33,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:33,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:33,650 INFO L87 Difference]: Start difference. First operand 12310 states and 17394 transitions. Second operand 3 states. [2020-12-22 08:20:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:35,648 INFO L93 Difference]: Finished difference Result 16071 states and 22653 transitions. [2020-12-22 08:20:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:35,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:20:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:35,660 INFO L225 Difference]: With dead ends: 16071 [2020-12-22 08:20:35,660 INFO L226 Difference]: Without dead ends: 10673 [2020-12-22 08:20:35,667 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 08:20:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2020-12-22 08:20:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 10671. [2020-12-22 08:20:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 08:20:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 14805 transitions. [2020-12-22 08:20:37,404 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 14805 transitions. Word has length 63 [2020-12-22 08:20:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:37,404 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 14805 transitions. [2020-12-22 08:20:37,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 14805 transitions. [2020-12-22 08:20:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:37,407 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] [2020-12-22 08:20:37,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:20:37,408 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -125701859, now seen corresponding path program 1 times [2020-12-22 08:20:37,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:37,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245723011] [2020-12-22 08:20:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:37,453 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 08:20:37,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245723011] [2020-12-22 08:20:37,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:37,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:37,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310747570] [2020-12-22 08:20:37,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:37,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:37,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:37,455 INFO L87 Difference]: Start difference. First operand 10671 states and 14805 transitions. Second operand 3 states. [2020-12-22 08:20:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:39,193 INFO L93 Difference]: Finished difference Result 13731 states and 19017 transitions. [2020-12-22 08:20:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:39,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:20:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:39,202 INFO L225 Difference]: With dead ends: 13731 [2020-12-22 08:20:39,203 INFO L226 Difference]: Without dead ends: 8971 [2020-12-22 08:20:39,210 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 08:20:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-12-22 08:20:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2020-12-22 08:20:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8969 states. [2020-12-22 08:20:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12238 transitions. [2020-12-22 08:20:40,546 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12238 transitions. Word has length 63 [2020-12-22 08:20:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:40,546 INFO L481 AbstractCegarLoop]: Abstraction has 8969 states and 12238 transitions. [2020-12-22 08:20:40,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12238 transitions. [2020-12-22 08:20:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:20:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:40,549 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] [2020-12-22 08:20:40,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:20:40,549 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash 666404545, now seen corresponding path program 1 times [2020-12-22 08:20:40,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:40,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190694409] [2020-12-22 08:20:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:40,589 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 08:20:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190694409] [2020-12-22 08:20:40,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:40,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061291970] [2020-12-22 08:20:40,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:40,591 INFO L87 Difference]: Start difference. First operand 8969 states and 12238 transitions. Second operand 3 states. [2020-12-22 08:20:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:42,626 INFO L93 Difference]: Finished difference Result 16348 states and 22409 transitions. [2020-12-22 08:20:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:42,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:20:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:42,639 INFO L225 Difference]: With dead ends: 16348 [2020-12-22 08:20:42,639 INFO L226 Difference]: Without dead ends: 12990 [2020-12-22 08:20:42,642 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 08:20:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12990 states. [2020-12-22 08:20:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12990 to 8866. [2020-12-22 08:20:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8866 states. [2020-12-22 08:20:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 12083 transitions. [2020-12-22 08:20:44,093 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 12083 transitions. Word has length 64 [2020-12-22 08:20:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:44,093 INFO L481 AbstractCegarLoop]: Abstraction has 8866 states and 12083 transitions. [2020-12-22 08:20:44,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 12083 transitions. [2020-12-22 08:20:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:20:44,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:44,095 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] [2020-12-22 08:20:44,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:20:44,096 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 859970200, now seen corresponding path program 1 times [2020-12-22 08:20:44,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:44,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456865545] [2020-12-22 08:20:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:45,153 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 08:20:45,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456865545] [2020-12-22 08:20:45,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:45,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:20:45,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630759110] [2020-12-22 08:20:45,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:20:45,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:20:45,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:20:45,156 INFO L87 Difference]: Start difference. First operand 8866 states and 12083 transitions. Second operand 23 states. [2020-12-22 08:20:45,462 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-12-22 08:20:46,562 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:20:46,940 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-22 08:20:47,211 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-12-22 08:20:47,725 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 08:20:48,106 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-12-22 08:20:48,282 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:20:48,524 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:21:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:00,331 INFO L93 Difference]: Finished difference Result 30352 states and 41829 transitions. [2020-12-22 08:21:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:21:00,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:21:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:00,364 INFO L225 Difference]: With dead ends: 30352 [2020-12-22 08:21:00,364 INFO L226 Difference]: Without dead ends: 29970 [2020-12-22 08:21:00,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=458, Invalid=2194, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 08:21:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29970 states. [2020-12-22 08:21:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29970 to 8878. [2020-12-22 08:21:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8878 states. [2020-12-22 08:21:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 12098 transitions. [2020-12-22 08:21:02,190 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 12098 transitions. Word has length 64 [2020-12-22 08:21:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:02,190 INFO L481 AbstractCegarLoop]: Abstraction has 8878 states and 12098 transitions. [2020-12-22 08:21:02,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:21:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 12098 transitions. [2020-12-22 08:21:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:21:02,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:02,192 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] [2020-12-22 08:21:02,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:21:02,193 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1948770272, now seen corresponding path program 1 times [2020-12-22 08:21:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:02,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882966791] [2020-12-22 08:21:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:03,276 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 08:21:03,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882966791] [2020-12-22 08:21:03,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:03,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:21:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589763901] [2020-12-22 08:21:03,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:21:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:21:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:21:03,278 INFO L87 Difference]: Start difference. First operand 8878 states and 12098 transitions. Second operand 23 states. [2020-12-22 08:21:03,665 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-12-22 08:21:04,667 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:21:04,904 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 08:21:05,501 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-12-22 08:21:05,925 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-12-22 08:21:06,755 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 108 [2020-12-22 08:21:07,395 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 114 [2020-12-22 08:21:07,633 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:21:07,949 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:21:08,403 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:21:08,745 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 08:21:09,051 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:21:09,413 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:21:09,838 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-12-22 08:21:10,154 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:21:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:22,799 INFO L93 Difference]: Finished difference Result 38412 states and 53063 transitions. [2020-12-22 08:21:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:21:22,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:21:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:22,848 INFO L225 Difference]: With dead ends: 38412 [2020-12-22 08:21:22,848 INFO L226 Difference]: Without dead ends: 38030 [2020-12-22 08:21:22,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=476, Invalid=1974, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 08:21:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38030 states. [2020-12-22 08:21:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38030 to 8860. [2020-12-22 08:21:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8860 states. [2020-12-22 08:21:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 12073 transitions. [2020-12-22 08:21:24,823 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 12073 transitions. Word has length 64 [2020-12-22 08:21:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:24,823 INFO L481 AbstractCegarLoop]: Abstraction has 8860 states and 12073 transitions. [2020-12-22 08:21:24,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:21:24,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 12073 transitions. [2020-12-22 08:21:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:21:24,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:24,826 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] [2020-12-22 08:21:24,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:21:24,826 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:24,827 INFO L82 PathProgramCache]: Analyzing trace with hash 682523932, now seen corresponding path program 1 times [2020-12-22 08:21:24,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:24,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675817337] [2020-12-22 08:21:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:25,835 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 08:21:25,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675817337] [2020-12-22 08:21:25,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:25,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:21:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483535209] [2020-12-22 08:21:25,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:21:25,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:21:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:21:25,837 INFO L87 Difference]: Start difference. First operand 8860 states and 12073 transitions. Second operand 23 states. [2020-12-22 08:21:26,132 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 08:21:27,080 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:21:27,463 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 08:21:27,709 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 08:21:28,225 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-12-22 08:21:28,558 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 08:21:28,738 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:21:29,082 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:21:29,484 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:21:29,754 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:21:30,008 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:21:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:42,447 INFO L93 Difference]: Finished difference Result 27703 states and 38187 transitions. [2020-12-22 08:21:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:21:42,448 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:21:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:42,480 INFO L225 Difference]: With dead ends: 27703 [2020-12-22 08:21:42,480 INFO L226 Difference]: Without dead ends: 27321 [2020-12-22 08:21:42,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:21:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27321 states. [2020-12-22 08:21:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27321 to 8842. [2020-12-22 08:21:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-12-22 08:21:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12048 transitions. [2020-12-22 08:21:44,683 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12048 transitions. Word has length 64 [2020-12-22 08:21:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:44,684 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12048 transitions. [2020-12-22 08:21:44,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:21:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12048 transitions. [2020-12-22 08:21:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:21:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:44,687 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] [2020-12-22 08:21:44,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:21:44,687 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:44,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1079669093, now seen corresponding path program 1 times [2020-12-22 08:21:44,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:44,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64612913] [2020-12-22 08:21:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:44,716 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 08:21:44,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64612913] [2020-12-22 08:21:44,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:44,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933689458] [2020-12-22 08:21:44,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:44,718 INFO L87 Difference]: Start difference. First operand 8842 states and 12048 transitions. Second operand 3 states. [2020-12-22 08:21:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:47,758 INFO L93 Difference]: Finished difference Result 16107 states and 22059 transitions. [2020-12-22 08:21:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:47,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:21:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:47,771 INFO L225 Difference]: With dead ends: 16107 [2020-12-22 08:21:47,771 INFO L226 Difference]: Without dead ends: 12782 [2020-12-22 08:21:47,775 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 08:21:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2020-12-22 08:21:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 8658. [2020-12-22 08:21:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8658 states. [2020-12-22 08:21:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8658 states to 8658 states and 11791 transitions. [2020-12-22 08:21:49,889 INFO L78 Accepts]: Start accepts. Automaton has 8658 states and 11791 transitions. Word has length 64 [2020-12-22 08:21:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:49,890 INFO L481 AbstractCegarLoop]: Abstraction has 8658 states and 11791 transitions. [2020-12-22 08:21:49,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8658 states and 11791 transitions. [2020-12-22 08:21:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:21:49,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:49,892 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] [2020-12-22 08:21:49,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:21:49,892 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2017308149, now seen corresponding path program 1 times [2020-12-22 08:21:49,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:49,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904524207] [2020-12-22 08:21:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:49,918 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 08:21:49,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904524207] [2020-12-22 08:21:49,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:49,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:49,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962028149] [2020-12-22 08:21:49,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:49,921 INFO L87 Difference]: Start difference. First operand 8658 states and 11791 transitions. Second operand 3 states. [2020-12-22 08:21:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:53,163 INFO L93 Difference]: Finished difference Result 16562 states and 22635 transitions. [2020-12-22 08:21:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:53,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:21:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:53,185 INFO L225 Difference]: With dead ends: 16562 [2020-12-22 08:21:53,185 INFO L226 Difference]: Without dead ends: 12542 [2020-12-22 08:21:53,190 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 08:21:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12542 states. [2020-12-22 08:21:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12542 to 8257. [2020-12-22 08:21:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8257 states. [2020-12-22 08:21:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 11241 transitions. [2020-12-22 08:21:55,368 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 11241 transitions. Word has length 64 [2020-12-22 08:21:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:55,369 INFO L481 AbstractCegarLoop]: Abstraction has 8257 states and 11241 transitions. [2020-12-22 08:21:55,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 11241 transitions. [2020-12-22 08:21:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:21:55,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:55,371 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] [2020-12-22 08:21:55,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:21:55,371 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 144276108, now seen corresponding path program 1 times [2020-12-22 08:21:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:55,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498570482] [2020-12-22 08:21:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:56,302 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-12-22 08:21:56,590 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-12-22 08:21:57,038 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 08:21:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498570482] [2020-12-22 08:21:57,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:57,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:21:57,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550054473] [2020-12-22 08:21:57,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:21:57,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:57,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:21:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:21:57,040 INFO L87 Difference]: Start difference. First operand 8257 states and 11241 transitions. Second operand 19 states. [2020-12-22 08:21:57,388 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 08:21:57,797 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-22 08:21:58,109 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-12-22 08:21:58,461 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-12-22 08:21:58,827 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 08:21:59,514 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-12-22 08:22:00,198 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-12-22 08:22:01,184 WARN L197 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-12-22 08:22:02,126 WARN L197 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2020-12-22 08:22:02,849 WARN L197 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-12-22 08:22:03,642 WARN L197 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-12-22 08:22:03,883 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 08:22:04,600 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-12-22 08:22:05,447 WARN L197 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2020-12-22 08:22:05,947 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-12-22 08:22:06,621 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-12-22 08:22:07,709 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-12-22 08:22:08,209 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 08:22:08,724 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-12-22 08:22:09,345 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-12-22 08:22:15,800 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 08:22:20,354 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-22 08:22:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:26,016 INFO L93 Difference]: Finished difference Result 39654 states and 54458 transitions. [2020-12-22 08:22:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 08:22:26,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-12-22 08:22:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:26,056 INFO L225 Difference]: With dead ends: 39654 [2020-12-22 08:22:26,057 INFO L226 Difference]: Without dead ends: 39266 [2020-12-22 08:22:26,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:22:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39266 states. [2020-12-22 08:22:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39266 to 8251. [2020-12-22 08:22:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8251 states. [2020-12-22 08:22:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8251 states to 8251 states and 11233 transitions. [2020-12-22 08:22:28,770 INFO L78 Accepts]: Start accepts. Automaton has 8251 states and 11233 transitions. Word has length 65 [2020-12-22 08:22:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:28,771 INFO L481 AbstractCegarLoop]: Abstraction has 8251 states and 11233 transitions. [2020-12-22 08:22:28,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:22:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8251 states and 11233 transitions. [2020-12-22 08:22:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:22:28,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:28,773 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] [2020-12-22 08:22:28,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:22:28,773 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash 402441546, now seen corresponding path program 1 times [2020-12-22 08:22:28,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:28,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63029178] [2020-12-22 08:22:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:29,685 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 08:22:29,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63029178] [2020-12-22 08:22:29,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:29,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:22:29,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738162626] [2020-12-22 08:22:29,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:22:29,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:29,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:22:29,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:22:29,687 INFO L87 Difference]: Start difference. First operand 8251 states and 11233 transitions. Second operand 18 states. [2020-12-22 08:22:30,272 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:22:30,491 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 08:22:30,692 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-22 08:22:31,212 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-12-22 08:22:31,720 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-12-22 08:22:32,016 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:22:32,340 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:22:32,821 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 08:22:32,967 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-22 08:22:33,347 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:22:34,314 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-22 08:22:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:47,225 INFO L93 Difference]: Finished difference Result 31143 states and 42824 transitions. [2020-12-22 08:22:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 08:22:47,226 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 08:22:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:47,259 INFO L225 Difference]: With dead ends: 31143 [2020-12-22 08:22:47,259 INFO L226 Difference]: Without dead ends: 30559 [2020-12-22 08:22:47,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:22:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30559 states. [2020-12-22 08:22:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30559 to 8203. [2020-12-22 08:22:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8203 states. [2020-12-22 08:22:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8203 states to 8203 states and 11168 transitions. [2020-12-22 08:22:50,152 INFO L78 Accepts]: Start accepts. Automaton has 8203 states and 11168 transitions. Word has length 65 [2020-12-22 08:22:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:50,152 INFO L481 AbstractCegarLoop]: Abstraction has 8203 states and 11168 transitions. [2020-12-22 08:22:50,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:22:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8203 states and 11168 transitions. [2020-12-22 08:22:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:22:50,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:50,156 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] [2020-12-22 08:22:50,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:22:50,157 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1563174538, now seen corresponding path program 1 times [2020-12-22 08:22:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:50,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462966970] [2020-12-22 08:22:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:50,246 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 08:22:50,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462966970] [2020-12-22 08:22:50,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:50,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:22:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051673671] [2020-12-22 08:22:50,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:22:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:22:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:22:50,248 INFO L87 Difference]: Start difference. First operand 8203 states and 11168 transitions. Second operand 5 states. [2020-12-22 08:22:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:52,838 INFO L93 Difference]: Finished difference Result 8209 states and 11171 transitions. [2020-12-22 08:22:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:22:52,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 08:22:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:52,845 INFO L225 Difference]: With dead ends: 8209 [2020-12-22 08:22:52,845 INFO L226 Difference]: Without dead ends: 7395 [2020-12-22 08:22:52,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:22:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2020-12-22 08:22:55,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 7391. [2020-12-22 08:22:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-12-22 08:22:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 10083 transitions. [2020-12-22 08:22:55,100 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 10083 transitions. Word has length 69 [2020-12-22 08:22:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:55,100 INFO L481 AbstractCegarLoop]: Abstraction has 7391 states and 10083 transitions. [2020-12-22 08:22:55,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:22:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 10083 transitions. [2020-12-22 08:22:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:22:55,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:55,103 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] [2020-12-22 08:22:55,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:22:55,103 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1535111263, now seen corresponding path program 1 times [2020-12-22 08:22:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:55,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560050016] [2020-12-22 08:22:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:55,154 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 08:22:55,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560050016] [2020-12-22 08:22:55,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:55,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:55,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019304746] [2020-12-22 08:22:55,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:55,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:55,156 INFO L87 Difference]: Start difference. First operand 7391 states and 10083 transitions. Second operand 3 states. [2020-12-22 08:22:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:59,708 INFO L93 Difference]: Finished difference Result 20117 states and 27536 transitions. [2020-12-22 08:22:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:59,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:22:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:59,724 INFO L225 Difference]: With dead ends: 20117 [2020-12-22 08:22:59,724 INFO L226 Difference]: Without dead ends: 13307 [2020-12-22 08:22:59,732 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 08:22:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13307 states. [2020-12-22 08:23:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13307 to 12427. [2020-12-22 08:23:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12427 states. [2020-12-22 08:23:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12427 states to 12427 states and 16880 transitions. [2020-12-22 08:23:03,792 INFO L78 Accepts]: Start accepts. Automaton has 12427 states and 16880 transitions. Word has length 72 [2020-12-22 08:23:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:03,792 INFO L481 AbstractCegarLoop]: Abstraction has 12427 states and 16880 transitions. [2020-12-22 08:23:03,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 12427 states and 16880 transitions. [2020-12-22 08:23:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:23:03,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:03,795 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] [2020-12-22 08:23:03,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:23:03,795 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1480821562, now seen corresponding path program 1 times [2020-12-22 08:23:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:03,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774692668] [2020-12-22 08:23:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:03,836 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 08:23:03,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774692668] [2020-12-22 08:23:03,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:03,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967583199] [2020-12-22 08:23:03,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:03,838 INFO L87 Difference]: Start difference. First operand 12427 states and 16880 transitions. Second operand 3 states. [2020-12-22 08:23:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:11,673 INFO L93 Difference]: Finished difference Result 34771 states and 47250 transitions. [2020-12-22 08:23:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:11,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:23:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:11,699 INFO L225 Difference]: With dead ends: 34771 [2020-12-22 08:23:11,700 INFO L226 Difference]: Without dead ends: 22950 [2020-12-22 08:23:11,712 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 08:23:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22950 states. [2020-12-22 08:23:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22950 to 21238. [2020-12-22 08:23:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21238 states. [2020-12-22 08:23:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21238 states to 21238 states and 28674 transitions. [2020-12-22 08:23:18,943 INFO L78 Accepts]: Start accepts. Automaton has 21238 states and 28674 transitions. Word has length 73 [2020-12-22 08:23:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:18,943 INFO L481 AbstractCegarLoop]: Abstraction has 21238 states and 28674 transitions. [2020-12-22 08:23:18,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21238 states and 28674 transitions. [2020-12-22 08:23:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:23:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:18,945 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] [2020-12-22 08:23:18,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:23:18,945 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1423402598, now seen corresponding path program 1 times [2020-12-22 08:23:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:18,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215837302] [2020-12-22 08:23:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:18,988 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 08:23:18,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215837302] [2020-12-22 08:23:18,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:18,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173619573] [2020-12-22 08:23:18,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:18,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:18,990 INFO L87 Difference]: Start difference. First operand 21238 states and 28674 transitions. Second operand 3 states. [2020-12-22 08:23:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:32,747 INFO L93 Difference]: Finished difference Result 59906 states and 80596 transitions. [2020-12-22 08:23:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:32,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:23:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:32,790 INFO L225 Difference]: With dead ends: 59906 [2020-12-22 08:23:32,790 INFO L226 Difference]: Without dead ends: 39274 [2020-12-22 08:23:32,805 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 08:23:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39274 states.