/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:27,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:27,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:27,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:27,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:27,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:27,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:27,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:27,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:27,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:27,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:27,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:27,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:27,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:27,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:27,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:27,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:27,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:27,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:27,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:27,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:27,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:27,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:27,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:27,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:27,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:24:27,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:24:27,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:24:27,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:24:27,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:24:27,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:24:27,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:24:27,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:24:27,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:27,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:27,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:27,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:27,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:27,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:27,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:27,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:27,669 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:27,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:27,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:27,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:27,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:27,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:27,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:27,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:27,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:27,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:27,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:27,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:27,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:27,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:27,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:27,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:27,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:27,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:27,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:27,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:27,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:27,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:28,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:28,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:28,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:28,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:28,185 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:28,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:28,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac2b98de2/c13d8498e43148eb82eb449160749ff7/FLAG645ec53a3 [2020-12-22 07:24:29,165 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:29,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:29,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac2b98de2/c13d8498e43148eb82eb449160749ff7/FLAG645ec53a3 [2020-12-22 07:24:29,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac2b98de2/c13d8498e43148eb82eb449160749ff7 [2020-12-22 07:24:29,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:29,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:29,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:29,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:29,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:29,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e429279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29, skipping insertion in model container [2020-12-22 07:24:29,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:29,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:30,095 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2020-12-22 07:24:30,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:30,113 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:30,416 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2020-12-22 07:24:30,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:30,447 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:30,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30 WrapperNode [2020-12-22 07:24:30,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:30,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:30,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:30,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:30,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:30,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:30,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:30,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:30,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... [2020-12-22 07:24:30,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:30,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:30,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:30,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:30,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:33,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:33,514 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:33,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:33 BoogieIcfgContainer [2020-12-22 07:24:33,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:33,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:33,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:33,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:33,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:29" (1/3) ... [2020-12-22 07:24:33,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146ce6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:33, skipping insertion in model container [2020-12-22 07:24:33,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:30" (2/3) ... [2020-12-22 07:24:33,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146ce6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:33, skipping insertion in model container [2020-12-22 07:24:33,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:33" (3/3) ... [2020-12-22 07:24:33,528 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:33,536 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:33,543 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:33,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:33,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:33,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:33,602 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:33,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:33,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:33,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:33,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:33,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-12-22 07:24:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:33,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:33,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:33,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2020-12-22 07:24:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:33,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963491912] [2020-12-22 07:24:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:34,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963491912] [2020-12-22 07:24:34,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:34,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:34,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962310279] [2020-12-22 07:24:34,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:34,357 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 2 states. [2020-12-22 07:24:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,431 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2020-12-22 07:24:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:34,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,458 INFO L225 Difference]: With dead ends: 867 [2020-12-22 07:24:34,458 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:34,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2020-12-22 07:24:34,590 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2020-12-22 07:24:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:34,591 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2020-12-22 07:24:34,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2020-12-22 07:24:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:34,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:34,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:34,614 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2020-12-22 07:24:34,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:34,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193242969] [2020-12-22 07:24:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:34,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193242969] [2020-12-22 07:24:34,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:34,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:34,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180296997] [2020-12-22 07:24:34,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:34,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:34,952 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand 5 states. [2020-12-22 07:24:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:35,202 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2020-12-22 07:24:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:35,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:35,219 INFO L225 Difference]: With dead ends: 862 [2020-12-22 07:24:35,219 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:35,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2020-12-22 07:24:35,273 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2020-12-22 07:24:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:35,275 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2020-12-22 07:24:35,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2020-12-22 07:24:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:35,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:35,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:35,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:35,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2020-12-22 07:24:35,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:35,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386546437] [2020-12-22 07:24:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:35,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386546437] [2020-12-22 07:24:35,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:35,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400656804] [2020-12-22 07:24:35,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:35,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:35,845 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand 3 states. [2020-12-22 07:24:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:35,930 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2020-12-22 07:24:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:35,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:35,938 INFO L225 Difference]: With dead ends: 1001 [2020-12-22 07:24:35,938 INFO L226 Difference]: Without dead ends: 845 [2020-12-22 07:24:35,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-12-22 07:24:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2020-12-22 07:24:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 07:24:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2020-12-22 07:24:35,970 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2020-12-22 07:24:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:35,971 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2020-12-22 07:24:35,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2020-12-22 07:24:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:35,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:35,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:35,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:35,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2020-12-22 07:24:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:35,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802041897] [2020-12-22 07:24:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802041897] [2020-12-22 07:24:36,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756813808] [2020-12-22 07:24:36,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,287 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand 3 states. [2020-12-22 07:24:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:36,344 INFO L93 Difference]: Finished difference Result 1415 states and 2451 transitions. [2020-12-22 07:24:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:36,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:24:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:36,353 INFO L225 Difference]: With dead ends: 1415 [2020-12-22 07:24:36,354 INFO L226 Difference]: Without dead ends: 1118 [2020-12-22 07:24:36,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2020-12-22 07:24:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2020-12-22 07:24:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-12-22 07:24:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1939 transitions. [2020-12-22 07:24:36,394 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1939 transitions. Word has length 216 [2020-12-22 07:24:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:36,394 INFO L481 AbstractCegarLoop]: Abstraction has 1116 states and 1939 transitions. [2020-12-22 07:24:36,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1939 transitions. [2020-12-22 07:24:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:24:36,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:36,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:36,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:36,400 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2020-12-22 07:24:36,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:36,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173442102] [2020-12-22 07:24:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173442102] [2020-12-22 07:24:36,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:36,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047352084] [2020-12-22 07:24:36,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,646 INFO L87 Difference]: Start difference. First operand 1116 states and 1939 transitions. Second operand 3 states. [2020-12-22 07:24:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:36,710 INFO L93 Difference]: Finished difference Result 2212 states and 3801 transitions. [2020-12-22 07:24:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:36,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:24:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:36,720 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:24:36,720 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 07:24:36,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 07:24:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 07:24:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 07:24:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2823 transitions. [2020-12-22 07:24:36,777 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2823 transitions. Word has length 220 [2020-12-22 07:24:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:36,778 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2823 transitions. [2020-12-22 07:24:36,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2823 transitions. [2020-12-22 07:24:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:24:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:36,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:36,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:36,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2020-12-22 07:24:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000583270] [2020-12-22 07:24:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:37,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000583270] [2020-12-22 07:24:37,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:37,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:37,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962683710] [2020-12-22 07:24:37,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:37,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:37,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:37,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:37,050 INFO L87 Difference]: Start difference. First operand 1640 states and 2823 transitions. Second operand 3 states. [2020-12-22 07:24:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:37,120 INFO L93 Difference]: Finished difference Result 3740 states and 6369 transitions. [2020-12-22 07:24:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:37,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:24:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:37,137 INFO L225 Difference]: With dead ends: 3740 [2020-12-22 07:24:37,137 INFO L226 Difference]: Without dead ends: 2646 [2020-12-22 07:24:37,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2020-12-22 07:24:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2644. [2020-12-22 07:24:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2020-12-22 07:24:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 4503 transitions. [2020-12-22 07:24:37,229 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 4503 transitions. Word has length 224 [2020-12-22 07:24:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:37,230 INFO L481 AbstractCegarLoop]: Abstraction has 2644 states and 4503 transitions. [2020-12-22 07:24:37,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 4503 transitions. [2020-12-22 07:24:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:24:37,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:37,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:37,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:37,238 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2020-12-22 07:24:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:37,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710613895] [2020-12-22 07:24:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:37,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710613895] [2020-12-22 07:24:37,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:37,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196983586] [2020-12-22 07:24:37,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:37,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:37,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:37,523 INFO L87 Difference]: Start difference. First operand 2644 states and 4503 transitions. Second operand 3 states. [2020-12-22 07:24:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:37,630 INFO L93 Difference]: Finished difference Result 6664 states and 11241 transitions. [2020-12-22 07:24:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:37,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:24:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:37,657 INFO L225 Difference]: With dead ends: 6664 [2020-12-22 07:24:37,658 INFO L226 Difference]: Without dead ends: 4566 [2020-12-22 07:24:37,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-12-22 07:24:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4564. [2020-12-22 07:24:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4564 states. [2020-12-22 07:24:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 7687 transitions. [2020-12-22 07:24:37,827 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 7687 transitions. Word has length 228 [2020-12-22 07:24:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:37,828 INFO L481 AbstractCegarLoop]: Abstraction has 4564 states and 7687 transitions. [2020-12-22 07:24:37,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 7687 transitions. [2020-12-22 07:24:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:24:37,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:37,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:37,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:37,836 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:37,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2020-12-22 07:24:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:37,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895712989] [2020-12-22 07:24:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895712989] [2020-12-22 07:24:38,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:38,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:38,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998328147] [2020-12-22 07:24:38,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:38,172 INFO L87 Difference]: Start difference. First operand 4564 states and 7687 transitions. Second operand 7 states. [2020-12-22 07:24:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:38,963 INFO L93 Difference]: Finished difference Result 25254 states and 42608 transitions. [2020-12-22 07:24:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:39,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:24:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:39,181 INFO L225 Difference]: With dead ends: 25254 [2020-12-22 07:24:39,181 INFO L226 Difference]: Without dead ends: 21236 [2020-12-22 07:24:39,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21236 states. [2020-12-22 07:24:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21236 to 10425. [2020-12-22 07:24:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10425 states. [2020-12-22 07:24:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 17552 transitions. [2020-12-22 07:24:39,649 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 17552 transitions. Word has length 232 [2020-12-22 07:24:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:39,650 INFO L481 AbstractCegarLoop]: Abstraction has 10425 states and 17552 transitions. [2020-12-22 07:24:39,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 17552 transitions. [2020-12-22 07:24:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:39,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:39,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:39,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:39,666 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:39,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:39,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2020-12-22 07:24:39,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:39,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69320788] [2020-12-22 07:24:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:39,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69320788] [2020-12-22 07:24:39,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:39,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:39,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848184193] [2020-12-22 07:24:39,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:39,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:39,985 INFO L87 Difference]: Start difference. First operand 10425 states and 17552 transitions. Second operand 4 states. [2020-12-22 07:24:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:40,375 INFO L93 Difference]: Finished difference Result 24422 states and 41127 transitions. [2020-12-22 07:24:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:40,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:24:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:40,415 INFO L225 Difference]: With dead ends: 24422 [2020-12-22 07:24:40,416 INFO L226 Difference]: Without dead ends: 14543 [2020-12-22 07:24:40,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14543 states. [2020-12-22 07:24:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14543 to 14508. [2020-12-22 07:24:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14508 states. [2020-12-22 07:24:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14508 states to 14508 states and 24415 transitions. [2020-12-22 07:24:40,964 INFO L78 Accepts]: Start accepts. Automaton has 14508 states and 24415 transitions. Word has length 233 [2020-12-22 07:24:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:40,964 INFO L481 AbstractCegarLoop]: Abstraction has 14508 states and 24415 transitions. [2020-12-22 07:24:40,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 14508 states and 24415 transitions. [2020-12-22 07:24:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:40,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:40,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:40,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:40,981 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2020-12-22 07:24:40,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:40,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738396327] [2020-12-22 07:24:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738396327] [2020-12-22 07:24:41,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:41,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326509727] [2020-12-22 07:24:41,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:41,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:41,274 INFO L87 Difference]: Start difference. First operand 14508 states and 24415 transitions. Second operand 3 states. [2020-12-22 07:24:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:41,655 INFO L93 Difference]: Finished difference Result 29224 states and 49193 transitions. [2020-12-22 07:24:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:41,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:41,715 INFO L225 Difference]: With dead ends: 29224 [2020-12-22 07:24:41,715 INFO L226 Difference]: Without dead ends: 21778 [2020-12-22 07:24:41,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2020-12-22 07:24:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21776. [2020-12-22 07:24:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 07:24:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 36490 transitions. [2020-12-22 07:24:42,529 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 36490 transitions. Word has length 233 [2020-12-22 07:24:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:42,530 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 36490 transitions. [2020-12-22 07:24:42,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 36490 transitions. [2020-12-22 07:24:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:42,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:42,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:42,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:42,543 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2020-12-22 07:24:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:42,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835592647] [2020-12-22 07:24:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835592647] [2020-12-22 07:24:42,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:42,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874687367] [2020-12-22 07:24:42,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:42,720 INFO L87 Difference]: Start difference. First operand 21776 states and 36490 transitions. Second operand 3 states. [2020-12-22 07:24:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:43,325 INFO L93 Difference]: Finished difference Result 40920 states and 68668 transitions. [2020-12-22 07:24:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:43,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:43,406 INFO L225 Difference]: With dead ends: 40920 [2020-12-22 07:24:43,406 INFO L226 Difference]: Without dead ends: 29964 [2020-12-22 07:24:43,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29964 states. [2020-12-22 07:24:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29964 to 29962. [2020-12-22 07:24:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29962 states. [2020-12-22 07:24:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29962 states to 29962 states and 50037 transitions. [2020-12-22 07:24:44,553 INFO L78 Accepts]: Start accepts. Automaton has 29962 states and 50037 transitions. Word has length 233 [2020-12-22 07:24:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:44,554 INFO L481 AbstractCegarLoop]: Abstraction has 29962 states and 50037 transitions. [2020-12-22 07:24:44,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 29962 states and 50037 transitions. [2020-12-22 07:24:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:44,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:44,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:44,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:44,562 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2020-12-22 07:24:44,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:44,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645534373] [2020-12-22 07:24:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:44,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645534373] [2020-12-22 07:24:44,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:44,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88466335] [2020-12-22 07:24:44,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:44,822 INFO L87 Difference]: Start difference. First operand 29962 states and 50037 transitions. Second operand 3 states. [2020-12-22 07:24:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:45,472 INFO L93 Difference]: Finished difference Result 57038 states and 95447 transitions. [2020-12-22 07:24:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:45,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:45,711 INFO L225 Difference]: With dead ends: 57038 [2020-12-22 07:24:45,712 INFO L226 Difference]: Without dead ends: 41549 [2020-12-22 07:24:45,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2020-12-22 07:24:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 41547. [2020-12-22 07:24:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41547 states. [2020-12-22 07:24:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41547 states to 41547 states and 69234 transitions. [2020-12-22 07:24:47,043 INFO L78 Accepts]: Start accepts. Automaton has 41547 states and 69234 transitions. Word has length 233 [2020-12-22 07:24:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:47,044 INFO L481 AbstractCegarLoop]: Abstraction has 41547 states and 69234 transitions. [2020-12-22 07:24:47,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 41547 states and 69234 transitions. [2020-12-22 07:24:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:47,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:47,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:47,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:47,051 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2020-12-22 07:24:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:47,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980201318] [2020-12-22 07:24:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:47,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980201318] [2020-12-22 07:24:47,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:47,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333782388] [2020-12-22 07:24:47,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:47,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:47,350 INFO L87 Difference]: Start difference. First operand 41547 states and 69234 transitions. Second operand 3 states. [2020-12-22 07:24:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:48,500 INFO L93 Difference]: Finished difference Result 79702 states and 133064 transitions. [2020-12-22 07:24:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:48,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:48,679 INFO L225 Difference]: With dead ends: 79702 [2020-12-22 07:24:48,680 INFO L226 Difference]: Without dead ends: 57977 [2020-12-22 07:24:48,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57977 states. [2020-12-22 07:24:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57977 to 57975. [2020-12-22 07:24:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57975 states. [2020-12-22 07:24:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57975 states to 57975 states and 96360 transitions. [2020-12-22 07:24:50,185 INFO L78 Accepts]: Start accepts. Automaton has 57975 states and 96360 transitions. Word has length 233 [2020-12-22 07:24:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:50,185 INFO L481 AbstractCegarLoop]: Abstraction has 57975 states and 96360 transitions. [2020-12-22 07:24:50,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57975 states and 96360 transitions. [2020-12-22 07:24:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:50,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:50,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:50,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:50,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -116012730, now seen corresponding path program 1 times [2020-12-22 07:24:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:50,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931025397] [2020-12-22 07:24:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931025397] [2020-12-22 07:24:50,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:50,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385338115] [2020-12-22 07:24:50,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:50,357 INFO L87 Difference]: Start difference. First operand 57975 states and 96360 transitions. Second operand 3 states. [2020-12-22 07:24:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:51,883 INFO L93 Difference]: Finished difference Result 133163 states and 222144 transitions. [2020-12-22 07:24:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:51,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:52,087 INFO L225 Difference]: With dead ends: 133163 [2020-12-22 07:24:52,087 INFO L226 Difference]: Without dead ends: 90449 [2020-12-22 07:24:52,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90449 states. [2020-12-22 07:24:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90449 to 90447. [2020-12-22 07:24:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90447 states. [2020-12-22 07:24:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90447 states to 90447 states and 149897 transitions. [2020-12-22 07:24:54,732 INFO L78 Accepts]: Start accepts. Automaton has 90447 states and 149897 transitions. Word has length 233 [2020-12-22 07:24:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:54,733 INFO L481 AbstractCegarLoop]: Abstraction has 90447 states and 149897 transitions. [2020-12-22 07:24:54,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 90447 states and 149897 transitions. [2020-12-22 07:24:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:24:54,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:54,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:54,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:24:54,737 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2020-12-22 07:24:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:54,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533013193] [2020-12-22 07:24:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:55,246 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 07:24:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533013193] [2020-12-22 07:24:55,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:55,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522838446] [2020-12-22 07:24:55,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:55,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:55,249 INFO L87 Difference]: Start difference. First operand 90447 states and 149897 transitions. Second operand 4 states. [2020-12-22 07:24:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:58,612 INFO L93 Difference]: Finished difference Result 299109 states and 496447 transitions. [2020-12-22 07:24:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:58,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:24:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:59,096 INFO L225 Difference]: With dead ends: 299109 [2020-12-22 07:24:59,096 INFO L226 Difference]: Without dead ends: 209274 [2020-12-22 07:24:59,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209274 states. [2020-12-22 07:25:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209274 to 149065. [2020-12-22 07:25:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149065 states. [2020-12-22 07:25:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149065 states to 149065 states and 246387 transitions. [2020-12-22 07:25:03,830 INFO L78 Accepts]: Start accepts. Automaton has 149065 states and 246387 transitions. Word has length 234 [2020-12-22 07:25:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:03,831 INFO L481 AbstractCegarLoop]: Abstraction has 149065 states and 246387 transitions. [2020-12-22 07:25:03,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 149065 states and 246387 transitions. [2020-12-22 07:25:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:03,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:03,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:03,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:25:03,835 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2020-12-22 07:25:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:03,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334575817] [2020-12-22 07:25:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:04,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334575817] [2020-12-22 07:25:04,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:04,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:04,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084529687] [2020-12-22 07:25:04,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:04,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:04,033 INFO L87 Difference]: Start difference. First operand 149065 states and 246387 transitions. Second operand 4 states. [2020-12-22 07:25:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:09,796 INFO L93 Difference]: Finished difference Result 490664 states and 812358 transitions. [2020-12-22 07:25:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:09,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:25:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:10,529 INFO L225 Difference]: With dead ends: 490664 [2020-12-22 07:25:10,529 INFO L226 Difference]: Without dead ends: 342211 [2020-12-22 07:25:10,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342211 states. [2020-12-22 07:25:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342211 to 245111. [2020-12-22 07:25:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245111 states. [2020-12-22 07:25:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245111 states to 245111 states and 404085 transitions. [2020-12-22 07:25:17,976 INFO L78 Accepts]: Start accepts. Automaton has 245111 states and 404085 transitions. Word has length 235 [2020-12-22 07:25:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:17,977 INFO L481 AbstractCegarLoop]: Abstraction has 245111 states and 404085 transitions. [2020-12-22 07:25:17,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 245111 states and 404085 transitions. [2020-12-22 07:25:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:25:17,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:17,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:17,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:25:17,981 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash 888014441, now seen corresponding path program 1 times [2020-12-22 07:25:17,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:17,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886469839] [2020-12-22 07:25:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:18,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886469839] [2020-12-22 07:25:18,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:18,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597376795] [2020-12-22 07:25:18,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:18,162 INFO L87 Difference]: Start difference. First operand 245111 states and 404085 transitions. Second operand 4 states. [2020-12-22 07:25:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:27,875 INFO L93 Difference]: Finished difference Result 802832 states and 1325838 transitions. [2020-12-22 07:25:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:27,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:25:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:29,137 INFO L225 Difference]: With dead ends: 802832 [2020-12-22 07:25:29,137 INFO L226 Difference]: Without dead ends: 558333 [2020-12-22 07:25:29,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558333 states. [2020-12-22 07:25:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558333 to 400865. [2020-12-22 07:25:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400865 states. [2020-12-22 07:25:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400865 states to 400865 states and 659175 transitions. [2020-12-22 07:25:42,576 INFO L78 Accepts]: Start accepts. Automaton has 400865 states and 659175 transitions. Word has length 236 [2020-12-22 07:25:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:42,577 INFO L481 AbstractCegarLoop]: Abstraction has 400865 states and 659175 transitions. [2020-12-22 07:25:42,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 400865 states and 659175 transitions. [2020-12-22 07:25:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:25:42,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:42,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:42,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:42,583 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash 168281838, now seen corresponding path program 1 times [2020-12-22 07:25:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:42,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967709323] [2020-12-22 07:25:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:43,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967709323] [2020-12-22 07:25:43,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:43,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891697561] [2020-12-22 07:25:43,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:43,529 INFO L87 Difference]: Start difference. First operand 400865 states and 659175 transitions. Second operand 4 states. [2020-12-22 07:26:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:01,804 INFO L93 Difference]: Finished difference Result 1299336 states and 2140398 transitions. [2020-12-22 07:26:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:01,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:26:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:04,100 INFO L225 Difference]: With dead ends: 1299336 [2020-12-22 07:26:04,100 INFO L226 Difference]: Without dead ends: 899083 [2020-12-22 07:26:04,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:26:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899083 states. [2020-12-22 07:26:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899083 to 648607. [2020-12-22 07:26:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:26:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1063905 transitions. [2020-12-22 07:26:26,679 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1063905 transitions. Word has length 237 [2020-12-22 07:26:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:26,688 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1063905 transitions. [2020-12-22 07:26:26,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1063905 transitions. [2020-12-22 07:26:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:26:26,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:26,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:26,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:26,708 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 500315686, now seen corresponding path program 1 times [2020-12-22 07:26:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:26,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550297057] [2020-12-22 07:26:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:28,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550297057] [2020-12-22 07:26:28,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:28,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:28,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750344180] [2020-12-22 07:26:28,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:28,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:28,013 INFO L87 Difference]: Start difference. First operand 648607 states and 1063905 transitions. Second operand 7 states. [2020-12-22 07:26:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:47,407 INFO L93 Difference]: Finished difference Result 1296606 states and 2126748 transitions. [2020-12-22 07:26:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:26:47,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:26:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:48,962 INFO L225 Difference]: With dead ends: 1296606 [2020-12-22 07:26:48,962 INFO L226 Difference]: Without dead ends: 648611 [2020-12-22 07:26:49,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:26:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648611 states. [2020-12-22 07:27:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648611 to 648607. [2020-12-22 07:27:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:27:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1060780 transitions. [2020-12-22 07:27:09,799 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1060780 transitions. Word has length 239 [2020-12-22 07:27:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:09,800 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1060780 transitions. [2020-12-22 07:27:09,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1060780 transitions. [2020-12-22 07:27:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:27:09,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:09,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:09,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:09,804 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1866662220, now seen corresponding path program 1 times [2020-12-22 07:27:09,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:09,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094395562] [2020-12-22 07:27:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:10,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094395562] [2020-12-22 07:27:10,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:10,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:10,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166578843] [2020-12-22 07:27:10,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:10,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:10,748 INFO L87 Difference]: Start difference. First operand 648607 states and 1060780 transitions. Second operand 7 states.