/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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:04:58,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:04:58,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:04:58,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:04:58,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:04:58,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:04:58,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:04:58,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:04:58,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:04:58,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:04:58,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:04:58,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:04:58,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:04:58,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:04:58,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:04:58,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:04:58,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:04:58,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:04:58,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:04:58,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:04:58,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:04:58,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:04:58,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:04:58,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:04:58,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:04:58,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:04:58,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:04:58,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:04:58,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:04:58,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:04:58,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:04:58,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:04:58,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:04:58,400 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:04:58,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:04:58,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:04:58,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:04:58,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:04:58,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:04:58,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:04:58,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:04:58,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:04:58,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:04:58,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:04:58,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:04:58,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:04:58,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:04:58,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:04:58,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:04:58,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:04:58,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:04:58,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:04:58,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:04:58,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:04:58,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:04:58,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:04:58,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:04:58,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:04:58,887 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:04:58,887 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:04:58,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2020-12-22 10:04:58,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5161ccb/06394f0b253c488f8265730fecc3ba71/FLAGee7f8953c [2020-12-22 10:05:00,100 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:05:00,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2020-12-22 10:05:00,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5161ccb/06394f0b253c488f8265730fecc3ba71/FLAGee7f8953c [2020-12-22 10:05:00,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5161ccb/06394f0b253c488f8265730fecc3ba71 [2020-12-22 10:05:00,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:05:00,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:05:00,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:05:00,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:05:00,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:05:00,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:05:00" (1/1) ... [2020-12-22 10:05:00,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5deea787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:00, skipping insertion in model container [2020-12-22 10:05:00,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:05:00" (1/1) ... [2020-12-22 10:05:00,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:05:00,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:05:01,111 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[15586,15599] [2020-12-22 10:05:01,191 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[18850,18863] [2020-12-22 10:05:02,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:05:02,194 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:05:02,294 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[15586,15599] [2020-12-22 10:05:02,307 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[18850,18863] [2020-12-22 10:05:03,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:05:03,138 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:05:03,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03 WrapperNode [2020-12-22 10:05:03,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:05:03,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:05:03,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:05:03,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:05:03,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:03,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:03,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:05:03,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:05:03,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:05:03,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:05:03,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:03,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:03,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:03,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:04,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:04,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:04,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (1/1) ... [2020-12-22 10:05:04,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:05:04,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:05:04,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:05:04,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:05:04,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (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 10:05:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:05:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:05:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:05:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:05:09,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:05:09,918 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:05:09,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:05:09 BoogieIcfgContainer [2020-12-22 10:05:09,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:05:09,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:05:09,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:05:09,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:05:09,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:05:00" (1/3) ... [2020-12-22 10:05:09,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f143aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:05:09, skipping insertion in model container [2020-12-22 10:05:09,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:03" (2/3) ... [2020-12-22 10:05:09,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f143aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:05:09, skipping insertion in model container [2020-12-22 10:05:09,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:05:09" (3/3) ... [2020-12-22 10:05:09,936 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2020-12-22 10:05:09,943 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:05:09,950 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:05:09,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:05:10,028 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:05:10,033 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:05:10,033 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:05:10,034 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:05:10,034 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:05:10,034 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:05:10,034 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:05:10,034 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:05:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:05:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 10:05:10,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:10,165 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] [2020-12-22 10:05:10,166 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash -124772307, now seen corresponding path program 1 times [2020-12-22 10:05:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:10,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657447449] [2020-12-22 10:05:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:10,520 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 10:05:10,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657447449] [2020-12-22 10:05:10,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:10,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:05:10,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699264542] [2020-12-22 10:05:10,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:10,555 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 3 states. [2020-12-22 10:05:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:16,578 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2020-12-22 10:05:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:16,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 10:05:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:16,622 INFO L225 Difference]: With dead ends: 2561 [2020-12-22 10:05:16,622 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:05:16,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:05:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:05:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:05:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:05:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2989 transitions. [2020-12-22 10:05:16,785 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2989 transitions. Word has length 30 [2020-12-22 10:05:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:16,786 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2989 transitions. [2020-12-22 10:05:16,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2989 transitions. [2020-12-22 10:05:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:05:16,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:16,789 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] [2020-12-22 10:05:16,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:05:16,789 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:16,790 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:05:16,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:16,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765673247] [2020-12-22 10:05:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:16,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765673247] [2020-12-22 10:05:16,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:16,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:05:16,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439564787] [2020-12-22 10:05:16,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:05:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:16,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:05:16,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:05:16,989 INFO L87 Difference]: Start difference. First operand 1611 states and 2989 transitions. Second operand 5 states. [2020-12-22 10:05:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:17,146 INFO L93 Difference]: Finished difference Result 1675 states and 3088 transitions. [2020-12-22 10:05:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:05:17,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:05:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:17,161 INFO L225 Difference]: With dead ends: 1675 [2020-12-22 10:05:17,162 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:05:17,164 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 10:05:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:05:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:05:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:05:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2949 transitions. [2020-12-22 10:05:17,212 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2949 transitions. Word has length 38 [2020-12-22 10:05:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:17,213 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2949 transitions. [2020-12-22 10:05:17,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:05:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2949 transitions. [2020-12-22 10:05:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:17,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:17,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:17,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:05:17,218 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:05:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590852497] [2020-12-22 10:05:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:17,354 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 10:05:17,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590852497] [2020-12-22 10:05:17,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:17,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:17,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894020029] [2020-12-22 10:05:17,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:17,364 INFO L87 Difference]: Start difference. First operand 1611 states and 2949 transitions. Second operand 3 states. [2020-12-22 10:05:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:17,485 INFO L93 Difference]: Finished difference Result 1725 states and 3129 transitions. [2020-12-22 10:05:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:17,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:05:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:17,500 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:05:17,501 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:05:17,504 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 10:05:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:05:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:05:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:05:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3032 transitions. [2020-12-22 10:05:17,583 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3032 transitions. Word has length 77 [2020-12-22 10:05:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:17,585 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 3032 transitions. [2020-12-22 10:05:17,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3032 transitions. [2020-12-22 10:05:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:17,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:17,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:17,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:05:17,593 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:05:17,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:17,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399967198] [2020-12-22 10:05:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:17,840 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 10:05:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399967198] [2020-12-22 10:05:17,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:17,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:17,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628485454] [2020-12-22 10:05:17,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:17,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:17,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:17,846 INFO L87 Difference]: Start difference. First operand 1663 states and 3032 transitions. Second operand 3 states. [2020-12-22 10:05:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:17,908 INFO L93 Difference]: Finished difference Result 1875 states and 3368 transitions. [2020-12-22 10:05:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:17,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:05:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:17,923 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:05:17,924 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:05:17,925 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 10:05:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:05:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:05:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:05:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3187 transitions. [2020-12-22 10:05:17,996 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3187 transitions. Word has length 77 [2020-12-22 10:05:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:17,997 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3187 transitions. [2020-12-22 10:05:17,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3187 transitions. [2020-12-22 10:05:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:17,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:18,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:18,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:05:18,000 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:05:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:18,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502154382] [2020-12-22 10:05:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:18,232 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 10:05:18,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502154382] [2020-12-22 10:05:18,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:18,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:18,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873456775] [2020-12-22 10:05:18,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:18,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:18,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:18,239 INFO L87 Difference]: Start difference. First operand 1761 states and 3187 transitions. Second operand 8 states. [2020-12-22 10:05:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:18,753 INFO L93 Difference]: Finished difference Result 4281 states and 7183 transitions. [2020-12-22 10:05:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:05:18,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:05:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:18,785 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:05:18,785 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:05:18,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:05:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:05:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:05:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:05:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3511 transitions. [2020-12-22 10:05:18,919 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3511 transitions. Word has length 77 [2020-12-22 10:05:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3511 transitions. [2020-12-22 10:05:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3511 transitions. [2020-12-22 10:05:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:18,922 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] [2020-12-22 10:05:18,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:05:18,922 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:05:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:18,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276400676] [2020-12-22 10:05:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:19,073 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 10:05:19,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276400676] [2020-12-22 10:05:19,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:19,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:19,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271503089] [2020-12-22 10:05:19,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:19,077 INFO L87 Difference]: Start difference. First operand 1969 states and 3511 transitions. Second operand 3 states. [2020-12-22 10:05:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:19,165 INFO L93 Difference]: Finished difference Result 2589 states and 4483 transitions. [2020-12-22 10:05:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:19,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:19,182 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:05:19,182 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:05:19,184 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 10:05:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:05:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:05:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:05:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3819 transitions. [2020-12-22 10:05:19,280 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3819 transitions. Word has length 79 [2020-12-22 10:05:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:19,282 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3819 transitions. [2020-12-22 10:05:19,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3819 transitions. [2020-12-22 10:05:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:19,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:19,283 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] [2020-12-22 10:05:19,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:05:19,289 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:05:19,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:19,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726630664] [2020-12-22 10:05:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:19,616 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 10:05:19,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726630664] [2020-12-22 10:05:19,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138861345] [2020-12-22 10:05:19,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:19,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:19,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:19,619 INFO L87 Difference]: Start difference. First operand 2169 states and 3819 transitions. Second operand 8 states. [2020-12-22 10:05:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:20,017 INFO L93 Difference]: Finished difference Result 2787 states and 4783 transitions. [2020-12-22 10:05:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:20,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:05:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:20,032 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:05:20,032 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:05:20,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:05:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:05:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:05:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:05:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3813 transitions. [2020-12-22 10:05:20,119 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3813 transitions. Word has length 79 [2020-12-22 10:05:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:20,119 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3813 transitions. [2020-12-22 10:05:20,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3813 transitions. [2020-12-22 10:05:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:20,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:20,128 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] [2020-12-22 10:05:20,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:05:20,128 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:05:20,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:20,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132951364] [2020-12-22 10:05:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:20,207 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 10:05:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132951364] [2020-12-22 10:05:20,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:20,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:20,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975587195] [2020-12-22 10:05:20,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:20,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:20,210 INFO L87 Difference]: Start difference. First operand 2169 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:05:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:20,309 INFO L93 Difference]: Finished difference Result 3329 states and 5607 transitions. [2020-12-22 10:05:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:20,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:20,325 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:05:20,325 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:05:20,328 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 10:05:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:05:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:05:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:05:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4637 transitions. [2020-12-22 10:05:20,444 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4637 transitions. Word has length 79 [2020-12-22 10:05:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:20,444 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4637 transitions. [2020-12-22 10:05:20,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4637 transitions. [2020-12-22 10:05:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:20,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:20,446 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] [2020-12-22 10:05:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:05:20,449 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:05:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:20,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109243491] [2020-12-22 10:05:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:20,525 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 10:05:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109243491] [2020-12-22 10:05:20,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:20,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:20,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413388604] [2020-12-22 10:05:20,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:20,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:20,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:20,529 INFO L87 Difference]: Start difference. First operand 2711 states and 4637 transitions. Second operand 3 states. [2020-12-22 10:05:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:20,698 INFO L93 Difference]: Finished difference Result 4883 states and 7959 transitions. [2020-12-22 10:05:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:20,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:20,724 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:05:20,724 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:05:20,727 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 10:05:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:05:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:05:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:05:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6153 transitions. [2020-12-22 10:05:21,037 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6153 transitions. Word has length 79 [2020-12-22 10:05:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:21,037 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 6153 transitions. [2020-12-22 10:05:21,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6153 transitions. [2020-12-22 10:05:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:21,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:21,039 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] [2020-12-22 10:05:21,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:05:21,039 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:05:21,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:21,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178024373] [2020-12-22 10:05:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:21,120 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 10:05:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178024373] [2020-12-22 10:05:21,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:21,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:21,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190148645] [2020-12-22 10:05:21,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:21,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:21,123 INFO L87 Difference]: Start difference. First operand 3723 states and 6153 transitions. Second operand 3 states. [2020-12-22 10:05:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:21,420 INFO L93 Difference]: Finished difference Result 7775 states and 12267 transitions. [2020-12-22 10:05:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:21,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:21,462 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:05:21,462 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:05:21,470 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 10:05:21,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:05:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:05:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:05:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8921 transitions. [2020-12-22 10:05:21,803 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8921 transitions. Word has length 79 [2020-12-22 10:05:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:21,803 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8921 transitions. [2020-12-22 10:05:21,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8921 transitions. [2020-12-22 10:05:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:21,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:21,805 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] [2020-12-22 10:05:21,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:05:21,805 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:05:21,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:21,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146653477] [2020-12-22 10:05:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:21,880 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 10:05:21,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146653477] [2020-12-22 10:05:21,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:21,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308731862] [2020-12-22 10:05:21,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:21,884 INFO L87 Difference]: Start difference. First operand 5603 states and 8921 transitions. Second operand 3 states. [2020-12-22 10:05:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:22,389 INFO L93 Difference]: Finished difference Result 13127 states and 20091 transitions. [2020-12-22 10:05:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:22,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:22,414 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:05:22,414 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:05:22,423 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 10:05:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:05:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:05:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:05:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13929 transitions. [2020-12-22 10:05:23,122 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13929 transitions. Word has length 79 [2020-12-22 10:05:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:23,123 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13929 transitions. [2020-12-22 10:05:23,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13929 transitions. [2020-12-22 10:05:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:05:23,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:23,124 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] [2020-12-22 10:05:23,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:05:23,124 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:05:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:23,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215321374] [2020-12-22 10:05:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:23,264 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 10:05:23,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215321374] [2020-12-22 10:05:23,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:23,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66006421] [2020-12-22 10:05:23,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:23,270 INFO L87 Difference]: Start difference. First operand 9075 states and 13929 transitions. Second operand 8 states. [2020-12-22 10:05:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:24,279 INFO L93 Difference]: Finished difference Result 15538 states and 23200 transitions. [2020-12-22 10:05:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:05:24,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:05:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:24,316 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:05:24,316 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:05:24,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:05:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:05:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:05:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:05:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14281 transitions. [2020-12-22 10:05:25,205 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14281 transitions. Word has length 80 [2020-12-22 10:05:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 14281 transitions. [2020-12-22 10:05:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14281 transitions. [2020-12-22 10:05:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:05:25,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:25,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:25,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:05:25,208 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1553363162, now seen corresponding path program 1 times [2020-12-22 10:05:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:25,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312068179] [2020-12-22 10:05:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312068179] [2020-12-22 10:05:25,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:25,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:05:25,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047687871] [2020-12-22 10:05:25,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:25,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:25,298 INFO L87 Difference]: Start difference. First operand 9459 states and 14281 transitions. Second operand 3 states. [2020-12-22 10:05:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:31,773 INFO L93 Difference]: Finished difference Result 12467 states and 19893 transitions. [2020-12-22 10:05:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:31,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:05:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:31,800 INFO L225 Difference]: With dead ends: 12467 [2020-12-22 10:05:31,800 INFO L226 Difference]: Without dead ends: 10963 [2020-12-22 10:05:31,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:05:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2020-12-22 10:05:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 10961. [2020-12-22 10:05:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10961 states. [2020-12-22 10:05:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 16438 transitions. [2020-12-22 10:05:32,511 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 16438 transitions. Word has length 95 [2020-12-22 10:05:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:32,511 INFO L481 AbstractCegarLoop]: Abstraction has 10961 states and 16438 transitions. [2020-12-22 10:05:32,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 16438 transitions. [2020-12-22 10:05:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 10:05:32,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:32,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:32,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:05:32,514 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1017444267, now seen corresponding path program 1 times [2020-12-22 10:05:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:32,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324995357] [2020-12-22 10:05:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 10:05:32,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324995357] [2020-12-22 10:05:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:32,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:05:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989945452] [2020-12-22 10:05:32,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:32,617 INFO L87 Difference]: Start difference. First operand 10961 states and 16438 transitions. Second operand 3 states. [2020-12-22 10:05:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:39,181 INFO L93 Difference]: Finished difference Result 16971 states and 26363 transitions. [2020-12-22 10:05:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:39,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 10:05:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:39,214 INFO L225 Difference]: With dead ends: 16971 [2020-12-22 10:05:39,214 INFO L226 Difference]: Without dead ends: 13965 [2020-12-22 10:05:39,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:05:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2020-12-22 10:05:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 13965. [2020-12-22 10:05:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13965 states. [2020-12-22 10:05:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13965 states to 13965 states and 20102 transitions. [2020-12-22 10:05:39,807 INFO L78 Accepts]: Start accepts. Automaton has 13965 states and 20102 transitions. Word has length 101 [2020-12-22 10:05:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:39,808 INFO L481 AbstractCegarLoop]: Abstraction has 13965 states and 20102 transitions. [2020-12-22 10:05:39,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 13965 states and 20102 transitions. [2020-12-22 10:05:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:39,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:39,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:39,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:05:39,816 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:05:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:39,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533965664] [2020-12-22 10:05:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:05:39,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533965664] [2020-12-22 10:05:39,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:39,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005483649] [2020-12-22 10:05:39,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:39,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:39,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:39,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:39,975 INFO L87 Difference]: Start difference. First operand 13965 states and 20102 transitions. Second operand 8 states. [2020-12-22 10:05:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:42,168 INFO L93 Difference]: Finished difference Result 62971 states and 90813 transitions. [2020-12-22 10:05:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:42,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:42,285 INFO L225 Difference]: With dead ends: 62971 [2020-12-22 10:05:42,286 INFO L226 Difference]: Without dead ends: 55065 [2020-12-22 10:05:42,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55065 states. [2020-12-22 10:05:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55065 to 21869. [2020-12-22 10:05:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21869 states. [2020-12-22 10:05:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21869 states to 21869 states and 31430 transitions. [2020-12-22 10:05:43,940 INFO L78 Accepts]: Start accepts. Automaton has 21869 states and 31430 transitions. Word has length 112 [2020-12-22 10:05:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:43,941 INFO L481 AbstractCegarLoop]: Abstraction has 21869 states and 31430 transitions. [2020-12-22 10:05:43,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21869 states and 31430 transitions. [2020-12-22 10:05:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:43,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:43,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:05:43,950 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:05:43,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:43,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40945204] [2020-12-22 10:05:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:05:44,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40945204] [2020-12-22 10:05:44,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:44,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:44,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225551574] [2020-12-22 10:05:44,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:44,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:44,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:44,095 INFO L87 Difference]: Start difference. First operand 21869 states and 31430 transitions. Second operand 8 states. [2020-12-22 10:05:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:47,147 INFO L93 Difference]: Finished difference Result 70875 states and 102141 transitions. [2020-12-22 10:05:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:47,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:47,292 INFO L225 Difference]: With dead ends: 70875 [2020-12-22 10:05:47,293 INFO L226 Difference]: Without dead ends: 62969 [2020-12-22 10:05:47,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62969 states. [2020-12-22 10:05:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62969 to 33741. [2020-12-22 10:05:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33741 states. [2020-12-22 10:05:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33741 states to 33741 states and 48342 transitions. [2020-12-22 10:05:49,627 INFO L78 Accepts]: Start accepts. Automaton has 33741 states and 48342 transitions. Word has length 112 [2020-12-22 10:05:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:49,627 INFO L481 AbstractCegarLoop]: Abstraction has 33741 states and 48342 transitions. [2020-12-22 10:05:49,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33741 states and 48342 transitions. [2020-12-22 10:05:49,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:49,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:49,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:49,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:05:49,638 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:05:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:49,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659551948] [2020-12-22 10:05:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:05:49,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659551948] [2020-12-22 10:05:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155770322] [2020-12-22 10:05:49,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:49,786 INFO L87 Difference]: Start difference. First operand 33741 states and 48342 transitions. Second operand 8 states. [2020-12-22 10:05:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:53,300 INFO L93 Difference]: Finished difference Result 78779 states and 113469 transitions. [2020-12-22 10:05:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:53,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:53,393 INFO L225 Difference]: With dead ends: 78779 [2020-12-22 10:05:53,393 INFO L226 Difference]: Without dead ends: 70873 [2020-12-22 10:05:53,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70873 states. [2020-12-22 10:05:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70873 to 41645. [2020-12-22 10:05:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41645 states. [2020-12-22 10:05:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41645 states to 41645 states and 59670 transitions. [2020-12-22 10:05:56,042 INFO L78 Accepts]: Start accepts. Automaton has 41645 states and 59670 transitions. Word has length 112 [2020-12-22 10:05:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:56,043 INFO L481 AbstractCegarLoop]: Abstraction has 41645 states and 59670 transitions. [2020-12-22 10:05:56,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41645 states and 59670 transitions. [2020-12-22 10:05:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:56,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:56,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:56,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:05:56,056 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:05:56,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:56,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167901148] [2020-12-22 10:05:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:05:56,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167901148] [2020-12-22 10:05:56,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:56,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:56,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566203689] [2020-12-22 10:05:56,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:56,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:56,210 INFO L87 Difference]: Start difference. First operand 41645 states and 59670 transitions. Second operand 8 states. [2020-12-22 10:06:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:01,166 INFO L93 Difference]: Finished difference Result 86683 states and 124797 transitions. [2020-12-22 10:06:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:01,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:01,253 INFO L225 Difference]: With dead ends: 86683 [2020-12-22 10:06:01,253 INFO L226 Difference]: Without dead ends: 78777 [2020-12-22 10:06:01,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78777 states. [2020-12-22 10:06:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78777 to 49549. [2020-12-22 10:06:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49549 states. [2020-12-22 10:06:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49549 states to 49549 states and 70998 transitions. [2020-12-22 10:06:04,773 INFO L78 Accepts]: Start accepts. Automaton has 49549 states and 70998 transitions. Word has length 112 [2020-12-22 10:06:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:04,773 INFO L481 AbstractCegarLoop]: Abstraction has 49549 states and 70998 transitions. [2020-12-22 10:06:04,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 49549 states and 70998 transitions. [2020-12-22 10:06:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:06:04,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:04,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:04,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:06:04,786 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:06:04,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:04,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799783567] [2020-12-22 10:06:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:06:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799783567] [2020-12-22 10:06:04,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:06:04,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786985702] [2020-12-22 10:06:04,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:06:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:06:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:06:04,932 INFO L87 Difference]: Start difference. First operand 49549 states and 70998 transitions. Second operand 8 states. [2020-12-22 10:06:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:10,553 INFO L93 Difference]: Finished difference Result 94587 states and 136125 transitions. [2020-12-22 10:06:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:10,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:10,636 INFO L225 Difference]: With dead ends: 94587 [2020-12-22 10:06:10,636 INFO L226 Difference]: Without dead ends: 86681 [2020-12-22 10:06:10,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86681 states. [2020-12-22 10:06:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86681 to 57453. [2020-12-22 10:06:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57453 states. [2020-12-22 10:06:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57453 states to 57453 states and 82326 transitions. [2020-12-22 10:06:14,931 INFO L78 Accepts]: Start accepts. Automaton has 57453 states and 82326 transitions. Word has length 112 [2020-12-22 10:06:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:14,931 INFO L481 AbstractCegarLoop]: Abstraction has 57453 states and 82326 transitions. [2020-12-22 10:06:14,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 57453 states and 82326 transitions. [2020-12-22 10:06:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:06:14,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:14,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:14,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:06:14,943 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:06:14,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:14,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571889749] [2020-12-22 10:06:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:06:15,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571889749] [2020-12-22 10:06:15,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:06:15,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734858667] [2020-12-22 10:06:15,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:06:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:06:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:06:15,117 INFO L87 Difference]: Start difference. First operand 57453 states and 82326 transitions. Second operand 8 states. [2020-12-22 10:06:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:21,371 INFO L93 Difference]: Finished difference Result 97691 states and 140605 transitions. [2020-12-22 10:06:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:21,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:21,471 INFO L225 Difference]: With dead ends: 97691 [2020-12-22 10:06:21,472 INFO L226 Difference]: Without dead ends: 92185 [2020-12-22 10:06:21,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92185 states. [2020-12-22 10:06:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92185 to 62957. [2020-12-22 10:06:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62957 states. [2020-12-22 10:06:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62957 states to 62957 states and 90262 transitions. [2020-12-22 10:06:26,287 INFO L78 Accepts]: Start accepts. Automaton has 62957 states and 90262 transitions. Word has length 112 [2020-12-22 10:06:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:26,288 INFO L481 AbstractCegarLoop]: Abstraction has 62957 states and 90262 transitions. [2020-12-22 10:06:26,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 62957 states and 90262 transitions. [2020-12-22 10:06:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:26,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:26,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:26,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:06:26,298 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:26,298 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:06:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:26,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649879703] [2020-12-22 10:06:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:26,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649879703] [2020-12-22 10:06:26,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:26,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:26,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227527269] [2020-12-22 10:06:26,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:26,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:26,380 INFO L87 Difference]: Start difference. First operand 62957 states and 90262 transitions. Second operand 3 states. [2020-12-22 10:06:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:30,587 INFO L93 Difference]: Finished difference Result 119857 states and 171848 transitions. [2020-12-22 10:06:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:30,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:30,653 INFO L225 Difference]: With dead ends: 119857 [2020-12-22 10:06:30,653 INFO L226 Difference]: Without dead ends: 62959 [2020-12-22 10:06:30,690 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 10:06:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62959 states. [2020-12-22 10:06:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62959 to 62957. [2020-12-22 10:06:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62957 states. [2020-12-22 10:06:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62957 states to 62957 states and 89574 transitions. [2020-12-22 10:06:35,209 INFO L78 Accepts]: Start accepts. Automaton has 62957 states and 89574 transitions. Word has length 113 [2020-12-22 10:06:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:35,209 INFO L481 AbstractCegarLoop]: Abstraction has 62957 states and 89574 transitions. [2020-12-22 10:06:35,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62957 states and 89574 transitions. [2020-12-22 10:06:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:35,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:35,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:35,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:06:35,216 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:35,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:06:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:35,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596703638] [2020-12-22 10:06:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596703638] [2020-12-22 10:06:35,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:35,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169593043] [2020-12-22 10:06:35,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:35,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:35,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:35,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:35,290 INFO L87 Difference]: Start difference. First operand 62957 states and 89574 transitions. Second operand 3 states. [2020-12-22 10:06:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:37,601 INFO L93 Difference]: Finished difference Result 91409 states and 130024 transitions. [2020-12-22 10:06:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:37,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:37,639 INFO L225 Difference]: With dead ends: 91409 [2020-12-22 10:06:37,640 INFO L226 Difference]: Without dead ends: 34511 [2020-12-22 10:06:37,666 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 10:06:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34511 states. [2020-12-22 10:06:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34511 to 34509. [2020-12-22 10:06:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34509 states. [2020-12-22 10:06:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34509 states to 34509 states and 48782 transitions. [2020-12-22 10:06:40,141 INFO L78 Accepts]: Start accepts. Automaton has 34509 states and 48782 transitions. Word has length 113 [2020-12-22 10:06:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:40,141 INFO L481 AbstractCegarLoop]: Abstraction has 34509 states and 48782 transitions. [2020-12-22 10:06:40,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34509 states and 48782 transitions. [2020-12-22 10:06:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:40,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:40,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:40,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:06:40,145 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:06:40,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:40,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93223634] [2020-12-22 10:06:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:40,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93223634] [2020-12-22 10:06:40,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:40,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:40,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564198215] [2020-12-22 10:06:40,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:40,252 INFO L87 Difference]: Start difference. First operand 34509 states and 48782 transitions. Second operand 3 states. [2020-12-22 10:06:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:41,582 INFO L93 Difference]: Finished difference Result 48737 states and 68836 transitions. [2020-12-22 10:06:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:41,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:41,601 INFO L225 Difference]: With dead ends: 48737 [2020-12-22 10:06:41,601 INFO L226 Difference]: Without dead ends: 20287 [2020-12-22 10:06:41,612 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 10:06:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20287 states. [2020-12-22 10:06:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20287 to 20285. [2020-12-22 10:06:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20285 states. [2020-12-22 10:06:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20285 states to 20285 states and 28558 transitions. [2020-12-22 10:06:42,786 INFO L78 Accepts]: Start accepts. Automaton has 20285 states and 28558 transitions. Word has length 113 [2020-12-22 10:06:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:42,786 INFO L481 AbstractCegarLoop]: Abstraction has 20285 states and 28558 transitions. [2020-12-22 10:06:42,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 20285 states and 28558 transitions. [2020-12-22 10:06:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:42,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:42,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:06:42,790 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:06:42,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:42,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206320584] [2020-12-22 10:06:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:42,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206320584] [2020-12-22 10:06:42,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:42,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:42,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578635475] [2020-12-22 10:06:42,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:42,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:42,876 INFO L87 Difference]: Start difference. First operand 20285 states and 28558 transitions. Second operand 3 states. [2020-12-22 10:06:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:43,548 INFO L93 Difference]: Finished difference Result 27401 states and 38500 transitions. [2020-12-22 10:06:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:43,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:43,562 INFO L225 Difference]: With dead ends: 27401 [2020-12-22 10:06:43,562 INFO L226 Difference]: Without dead ends: 13175 [2020-12-22 10:06:43,571 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 10:06:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2020-12-22 10:06:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 13173. [2020-12-22 10:06:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13173 states. [2020-12-22 10:06:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13173 states to 13173 states and 18532 transitions. [2020-12-22 10:06:44,261 INFO L78 Accepts]: Start accepts. Automaton has 13173 states and 18532 transitions. Word has length 113 [2020-12-22 10:06:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:44,262 INFO L481 AbstractCegarLoop]: Abstraction has 13173 states and 18532 transitions. [2020-12-22 10:06:44,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13173 states and 18532 transitions. [2020-12-22 10:06:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:44,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:44,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:44,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:06:44,264 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:06:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:44,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545809520] [2020-12-22 10:06:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545809520] [2020-12-22 10:06:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416371880] [2020-12-22 10:06:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:06:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:06:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:06:45,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:45,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:06:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408931134] [2020-12-22 10:06:45,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:06:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:06:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:06:45,296 INFO L87 Difference]: Start difference. First operand 13173 states and 18532 transitions. Second operand 21 states. [2020-12-22 10:06:45,861 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:06:49,634 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:49,812 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:06:50,028 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:06:50,256 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:06:50,499 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:06:50,824 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:54,846 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:06:55,098 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:06:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:56,587 INFO L93 Difference]: Finished difference Result 61052 states and 83837 transitions. [2020-12-22 10:06:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:06:56,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:06:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:56,746 INFO L225 Difference]: With dead ends: 61052 [2020-12-22 10:06:56,747 INFO L226 Difference]: Without dead ends: 53938 [2020-12-22 10:06:56,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:06:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53938 states. [2020-12-22 10:07:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53938 to 36193. [2020-12-22 10:07:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36193 states. [2020-12-22 10:07:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36193 states to 36193 states and 49700 transitions. [2020-12-22 10:07:00,364 INFO L78 Accepts]: Start accepts. Automaton has 36193 states and 49700 transitions. Word has length 113 [2020-12-22 10:07:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:00,365 INFO L481 AbstractCegarLoop]: Abstraction has 36193 states and 49700 transitions. [2020-12-22 10:07:00,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:07:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 36193 states and 49700 transitions. [2020-12-22 10:07:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:00,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:07:00,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:07:00,586 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:00,587 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:07:00,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:00,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498245666] [2020-12-22 10:07:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:00,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498245666] [2020-12-22 10:07:00,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128036446] [2020-12-22 10:07:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:07:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:07:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:07:01,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:07:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:01,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:07:01,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:07:01,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376855439] [2020-12-22 10:07:01,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:07:01,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:07:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:07:01,645 INFO L87 Difference]: Start difference. First operand 36193 states and 49700 transitions. Second operand 18 states. [2020-12-22 10:07:01,788 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:02,248 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:02,842 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:07:04,229 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:04,366 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:04,731 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:05,085 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:06,799 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:07,290 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:07:07,436 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:07,576 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:07,824 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:07:08,088 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:07:08,227 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:10,164 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:10,300 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:07:10,441 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:10,606 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:11,764 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:07:13,142 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:13,516 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-12-22 10:07:13,685 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:13,880 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:14,162 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:07:14,679 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:14,867 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:07:15,013 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:15,153 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:15,344 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:07:16,149 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:07:20,356 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:07:20,650 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:20,863 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:07:21,015 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:21,972 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:22,574 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:53,146 INFO L93 Difference]: Finished difference Result 394963 states and 533284 transitions. [2020-12-22 10:07:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:07:53,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:07:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:54,283 INFO L225 Difference]: With dead ends: 394963 [2020-12-22 10:07:54,285 INFO L226 Difference]: Without dead ends: 364829 [2020-12-22 10:07:54,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:07:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364829 states. [2020-12-22 10:08:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364829 to 142470. [2020-12-22 10:08:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142470 states. [2020-12-22 10:08:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142470 states to 142470 states and 191226 transitions. [2020-12-22 10:08:11,732 INFO L78 Accepts]: Start accepts. Automaton has 142470 states and 191226 transitions. Word has length 114 [2020-12-22 10:08:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:11,733 INFO L481 AbstractCegarLoop]: Abstraction has 142470 states and 191226 transitions. [2020-12-22 10:08:11,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:08:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 142470 states and 191226 transitions. [2020-12-22 10:08:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:11,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:11,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:11,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:08:11,953 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:08:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:11,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372148887] [2020-12-22 10:08:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:12,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372148887] [2020-12-22 10:08:12,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:12,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903111193] [2020-12-22 10:08:12,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:12,023 INFO L87 Difference]: Start difference. First operand 142470 states and 191226 transitions. Second operand 3 states. [2020-12-22 10:08:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:18,190 INFO L93 Difference]: Finished difference Result 194562 states and 260361 transitions. [2020-12-22 10:08:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:18,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:08:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:18,274 INFO L225 Difference]: With dead ends: 194562 [2020-12-22 10:08:18,275 INFO L226 Difference]: Without dead ends: 58151 [2020-12-22 10:08:18,596 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 10:08:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58151 states. [2020-12-22 10:08:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58151 to 54675. [2020-12-22 10:08:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54675 states. [2020-12-22 10:08:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54675 states to 54675 states and 72808 transitions. [2020-12-22 10:08:24,199 INFO L78 Accepts]: Start accepts. Automaton has 54675 states and 72808 transitions. Word has length 114 [2020-12-22 10:08:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:24,200 INFO L481 AbstractCegarLoop]: Abstraction has 54675 states and 72808 transitions. [2020-12-22 10:08:24,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand 54675 states and 72808 transitions. [2020-12-22 10:08:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:24,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:24,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:24,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:08:24,203 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:08:24,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:24,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086987422] [2020-12-22 10:08:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:08:24,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086987422] [2020-12-22 10:08:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:24,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205575660] [2020-12-22 10:08:24,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:08:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:08:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:08:24,298 INFO L87 Difference]: Start difference. First operand 54675 states and 72808 transitions. Second operand 6 states. [2020-12-22 10:08:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:29,537 INFO L93 Difference]: Finished difference Result 100146 states and 133032 transitions. [2020-12-22 10:08:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:08:29,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:08:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:29,597 INFO L225 Difference]: With dead ends: 100146 [2020-12-22 10:08:29,597 INFO L226 Difference]: Without dead ends: 51647 [2020-12-22 10:08:29,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:08:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51647 states. [2020-12-22 10:08:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51647 to 51647. [2020-12-22 10:08:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51647 states. [2020-12-22 10:08:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51647 states to 51647 states and 68389 transitions. [2020-12-22 10:08:34,856 INFO L78 Accepts]: Start accepts. Automaton has 51647 states and 68389 transitions. Word has length 114 [2020-12-22 10:08:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:34,856 INFO L481 AbstractCegarLoop]: Abstraction has 51647 states and 68389 transitions. [2020-12-22 10:08:34,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:08:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51647 states and 68389 transitions. [2020-12-22 10:08:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:34,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:34,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:34,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:08:34,860 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:08:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:34,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586759096] [2020-12-22 10:08:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:08:34,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586759096] [2020-12-22 10:08:34,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:34,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623823923] [2020-12-22 10:08:34,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:08:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:08:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:08:34,952 INFO L87 Difference]: Start difference. First operand 51647 states and 68389 transitions. Second operand 6 states. [2020-12-22 10:08:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:39,183 INFO L93 Difference]: Finished difference Result 86349 states and 113882 transitions. [2020-12-22 10:08:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:08:39,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:08:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:39,223 INFO L225 Difference]: With dead ends: 86349 [2020-12-22 10:08:39,224 INFO L226 Difference]: Without dead ends: 40958 [2020-12-22 10:08:39,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:08:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40958 states.