/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:32:33,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:32:33,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:32:33,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:32:33,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:32:33,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:32:33,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:32:33,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:32:33,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:32:33,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:32:33,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:32:33,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:32:33,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:32:33,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:32:33,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:32:33,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:32:33,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:32:33,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:32:33,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:32:33,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:32:33,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:32:33,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:32:33,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:32:33,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:32:33,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:32:33,341 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:32:33,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:32:33,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:32:33,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:32:33,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:32:33,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:32:33,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:32:33,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:32:33,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:32:33,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:32:33,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:32:33,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:32:33,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:32:33,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:33,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:32:33,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:32:33,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:32:33,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:32:33,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:32:33,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:32:33,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:32:33,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:32:33,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:32:33,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:32:33,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:32:33,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:32:33,735 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:32:33,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:33,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9f93505/d5b9d56d009b41abb84b0f2e2e05439f/FLAGb4bd98e6d [2020-12-22 07:32:34,444 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:32:34,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:34,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9f93505/d5b9d56d009b41abb84b0f2e2e05439f/FLAGb4bd98e6d [2020-12-22 07:32:34,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9f93505/d5b9d56d009b41abb84b0f2e2e05439f [2020-12-22 07:32:34,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:32:34,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:32:34,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:34,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:32:34,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:32:34,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:34,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378ad10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34, skipping insertion in model container [2020-12-22 07:32:34,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:34,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:32:34,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:32:34,882 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2020-12-22 07:32:34,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:34,900 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:32:34,943 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2020-12-22 07:32:34,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:34,964 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:32:34,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34 WrapperNode [2020-12-22 07:32:34,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:34,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:34,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:32:34,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:32:34,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:34,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:35,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:32:35,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:32:35,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:32:35,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... [2020-12-22 07:32:35,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:32:35,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:32:35,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:32:35,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:32:35,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:35,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:32:35,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:32:35,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:32:35,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:32:35,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:32:35,818 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:32:35,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:35 BoogieIcfgContainer [2020-12-22 07:32:35,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:32:35,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:32:35,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:32:35,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:32:35,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:32:34" (1/3) ... [2020-12-22 07:32:35,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f268c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:35, skipping insertion in model container [2020-12-22 07:32:35,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:34" (2/3) ... [2020-12-22 07:32:35,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f268c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:35, skipping insertion in model container [2020-12-22 07:32:35,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:35" (3/3) ... [2020-12-22 07:32:35,832 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:35,839 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:32:35,845 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:32:35,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:32:35,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:32:35,905 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:32:35,905 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:32:35,906 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:32:35,906 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:32:35,907 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:32:35,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:32:35,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:32:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-12-22 07:32:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:35,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:35,939 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] [2020-12-22 07:32:35,939 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2020-12-22 07:32:35,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:35,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764145436] [2020-12-22 07:32:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764145436] [2020-12-22 07:32:36,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:36,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:32:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842505323] [2020-12-22 07:32:36,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:32:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:32:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:36,277 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 2 states. [2020-12-22 07:32:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,310 INFO L93 Difference]: Finished difference Result 126 states and 204 transitions. [2020-12-22 07:32:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:32:36,312 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-22 07:32:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,323 INFO L225 Difference]: With dead ends: 126 [2020-12-22 07:32:36,323 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 07:32:36,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 07:32:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 07:32:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 07:32:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2020-12-22 07:32:36,369 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2020-12-22 07:32:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:36,369 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2020-12-22 07:32:36,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:32:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2020-12-22 07:32:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:36,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:36,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:36,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:32:36,372 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2020-12-22 07:32:36,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:36,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753811206] [2020-12-22 07:32:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753811206] [2020-12-22 07:32:36,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:36,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:36,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50234264] [2020-12-22 07:32:36,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:36,506 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand 5 states. [2020-12-22 07:32:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,650 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2020-12-22 07:32:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:36,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 07:32:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,658 INFO L225 Difference]: With dead ends: 165 [2020-12-22 07:32:36,658 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 07:32:36,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 07:32:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-12-22 07:32:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 07:32:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-22 07:32:36,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2020-12-22 07:32:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:36,683 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-22 07:32:36,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-22 07:32:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:36,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:36,685 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] [2020-12-22 07:32:36,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:32:36,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2020-12-22 07:32:36,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:36,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239990338] [2020-12-22 07:32:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:36,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239990338] [2020-12-22 07:32:36,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:36,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:36,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373894620] [2020-12-22 07:32:36,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:36,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:36,818 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 3 states. [2020-12-22 07:32:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,842 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2020-12-22 07:32:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:36,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,844 INFO L225 Difference]: With dead ends: 155 [2020-12-22 07:32:36,845 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 07:32:36,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 07:32:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-12-22 07:32:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 07:32:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2020-12-22 07:32:36,859 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2020-12-22 07:32:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:36,859 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2020-12-22 07:32:36,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2020-12-22 07:32:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:36,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:36,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:36,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:32:36,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2020-12-22 07:32:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:36,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066156238] [2020-12-22 07:32:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066156238] [2020-12-22 07:32:37,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467382108] [2020-12-22 07:32:37,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,049 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand 3 states. [2020-12-22 07:32:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:37,097 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2020-12-22 07:32:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:37,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:37,100 INFO L225 Difference]: With dead ends: 257 [2020-12-22 07:32:37,100 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 07:32:37,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 07:32:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-12-22 07:32:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 07:32:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2020-12-22 07:32:37,140 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2020-12-22 07:32:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:37,143 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2020-12-22 07:32:37,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2020-12-22 07:32:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:37,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:37,147 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] [2020-12-22 07:32:37,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:32:37,148 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2020-12-22 07:32:37,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:37,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988332208] [2020-12-22 07:32:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:37,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988332208] [2020-12-22 07:32:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125039753] [2020-12-22 07:32:37,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,249 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand 3 states. [2020-12-22 07:32:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:37,296 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2020-12-22 07:32:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:37,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:37,303 INFO L225 Difference]: With dead ends: 443 [2020-12-22 07:32:37,303 INFO L226 Difference]: Without dead ends: 297 [2020-12-22 07:32:37,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-22 07:32:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2020-12-22 07:32:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 07:32:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2020-12-22 07:32:37,330 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2020-12-22 07:32:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:37,330 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2020-12-22 07:32:37,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2020-12-22 07:32:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:37,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:37,332 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] [2020-12-22 07:32:37,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:32:37,333 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2020-12-22 07:32:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:37,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369938272] [2020-12-22 07:32:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:37,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369938272] [2020-12-22 07:32:37,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392468258] [2020-12-22 07:32:37,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:37,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,399 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand 3 states. [2020-12-22 07:32:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:37,449 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2020-12-22 07:32:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:37,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:37,453 INFO L225 Difference]: With dead ends: 779 [2020-12-22 07:32:37,454 INFO L226 Difference]: Without dead ends: 513 [2020-12-22 07:32:37,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-12-22 07:32:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2020-12-22 07:32:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 07:32:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2020-12-22 07:32:37,531 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2020-12-22 07:32:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:37,532 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2020-12-22 07:32:37,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2020-12-22 07:32:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:37,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:37,533 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] [2020-12-22 07:32:37,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:32:37,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2020-12-22 07:32:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:37,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876627581] [2020-12-22 07:32:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:37,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876627581] [2020-12-22 07:32:37,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:37,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391843422] [2020-12-22 07:32:37,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:37,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:37,703 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand 6 states. [2020-12-22 07:32:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,045 INFO L93 Difference]: Finished difference Result 4367 states and 6662 transitions. [2020-12-22 07:32:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:32:38,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 07:32:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,070 INFO L225 Difference]: With dead ends: 4367 [2020-12-22 07:32:38,070 INFO L226 Difference]: Without dead ends: 3885 [2020-12-22 07:32:38,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:32:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-12-22 07:32:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 991. [2020-12-22 07:32:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2020-12-22 07:32:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1470 transitions. [2020-12-22 07:32:38,178 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1470 transitions. Word has length 51 [2020-12-22 07:32:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:38,179 INFO L481 AbstractCegarLoop]: Abstraction has 991 states and 1470 transitions. [2020-12-22 07:32:38,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1470 transitions. [2020-12-22 07:32:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:38,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:38,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:38,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:32:38,185 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2020-12-22 07:32:38,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:38,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833714193] [2020-12-22 07:32:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:38,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833714193] [2020-12-22 07:32:38,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:38,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:38,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318562995] [2020-12-22 07:32:38,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:38,250 INFO L87 Difference]: Start difference. First operand 991 states and 1470 transitions. Second operand 3 states. [2020-12-22 07:32:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,365 INFO L93 Difference]: Finished difference Result 2483 states and 3664 transitions. [2020-12-22 07:32:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:38,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:32:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,373 INFO L225 Difference]: With dead ends: 2483 [2020-12-22 07:32:38,374 INFO L226 Difference]: Without dead ends: 1521 [2020-12-22 07:32:38,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2020-12-22 07:32:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2020-12-22 07:32:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2020-12-22 07:32:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2174 transitions. [2020-12-22 07:32:38,472 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2174 transitions. Word has length 53 [2020-12-22 07:32:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:38,473 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 2174 transitions. [2020-12-22 07:32:38,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2174 transitions. [2020-12-22 07:32:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:38,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:38,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:38,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:32:38,474 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2020-12-22 07:32:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:38,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757683143] [2020-12-22 07:32:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:38,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757683143] [2020-12-22 07:32:38,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:38,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932019043] [2020-12-22 07:32:38,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:38,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:38,629 INFO L87 Difference]: Start difference. First operand 1519 states and 2174 transitions. Second operand 6 states. [2020-12-22 07:32:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,832 INFO L93 Difference]: Finished difference Result 3011 states and 4320 transitions. [2020-12-22 07:32:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:38,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 07:32:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,840 INFO L225 Difference]: With dead ends: 3011 [2020-12-22 07:32:38,840 INFO L226 Difference]: Without dead ends: 1521 [2020-12-22 07:32:38,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2020-12-22 07:32:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2020-12-22 07:32:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2020-12-22 07:32:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2158 transitions. [2020-12-22 07:32:38,966 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2158 transitions. Word has length 53 [2020-12-22 07:32:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:38,966 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 2158 transitions. [2020-12-22 07:32:38,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2158 transitions. [2020-12-22 07:32:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:32:38,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:38,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:38,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:32:38,968 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash 932544028, now seen corresponding path program 1 times [2020-12-22 07:32:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:38,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345930127] [2020-12-22 07:32:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:39,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345930127] [2020-12-22 07:32:39,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:39,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:39,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925383295] [2020-12-22 07:32:39,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:39,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:39,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:39,021 INFO L87 Difference]: Start difference. First operand 1519 states and 2158 transitions. Second operand 3 states. [2020-12-22 07:32:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:39,136 INFO L93 Difference]: Finished difference Result 3453 states and 4938 transitions. [2020-12-22 07:32:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:39,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 07:32:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:39,150 INFO L225 Difference]: With dead ends: 3453 [2020-12-22 07:32:39,150 INFO L226 Difference]: Without dead ends: 1963 [2020-12-22 07:32:39,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2020-12-22 07:32:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2020-12-22 07:32:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-12-22 07:32:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2784 transitions. [2020-12-22 07:32:39,300 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2784 transitions. Word has length 54 [2020-12-22 07:32:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:39,301 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 2784 transitions. [2020-12-22 07:32:39,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2784 transitions. [2020-12-22 07:32:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:32:39,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:39,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:39,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:32:39,302 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2020-12-22 07:32:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:39,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790822549] [2020-12-22 07:32:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:39,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790822549] [2020-12-22 07:32:39,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:32:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181274821] [2020-12-22 07:32:39,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:32:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:32:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:39,404 INFO L87 Difference]: Start difference. First operand 1961 states and 2784 transitions. Second operand 8 states. [2020-12-22 07:32:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:39,705 INFO L93 Difference]: Finished difference Result 3051 states and 4294 transitions. [2020-12-22 07:32:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:32:39,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-22 07:32:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:39,722 INFO L225 Difference]: With dead ends: 3051 [2020-12-22 07:32:39,722 INFO L226 Difference]: Without dead ends: 3049 [2020-12-22 07:32:39,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:32:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-12-22 07:32:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2009. [2020-12-22 07:32:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2020-12-22 07:32:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2808 transitions. [2020-12-22 07:32:39,885 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2808 transitions. Word has length 54 [2020-12-22 07:32:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:39,886 INFO L481 AbstractCegarLoop]: Abstraction has 2009 states and 2808 transitions. [2020-12-22 07:32:39,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:32:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2808 transitions. [2020-12-22 07:32:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:39,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:39,888 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:39,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:32:39,888 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2020-12-22 07:32:39,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:39,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518326831] [2020-12-22 07:32:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:32:39,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518326831] [2020-12-22 07:32:39,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:39,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:39,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181809016] [2020-12-22 07:32:39,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:39,978 INFO L87 Difference]: Start difference. First operand 2009 states and 2808 transitions. Second operand 6 states. [2020-12-22 07:32:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:40,518 INFO L93 Difference]: Finished difference Result 10459 states and 14637 transitions. [2020-12-22 07:32:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:40,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:40,562 INFO L225 Difference]: With dead ends: 10459 [2020-12-22 07:32:40,562 INFO L226 Difference]: Without dead ends: 8481 [2020-12-22 07:32:40,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 07:32:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8481 states. [2020-12-22 07:32:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8481 to 3985. [2020-12-22 07:32:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3985 states. [2020-12-22 07:32:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5552 transitions. [2020-12-22 07:32:40,943 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5552 transitions. Word has length 78 [2020-12-22 07:32:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:40,943 INFO L481 AbstractCegarLoop]: Abstraction has 3985 states and 5552 transitions. [2020-12-22 07:32:40,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5552 transitions. [2020-12-22 07:32:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:40,946 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:40,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:32:40,946 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -295558853, now seen corresponding path program 1 times [2020-12-22 07:32:40,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:40,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737296612] [2020-12-22 07:32:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:32:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737296612] [2020-12-22 07:32:41,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:41,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144983610] [2020-12-22 07:32:41,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:41,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:41,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:41,053 INFO L87 Difference]: Start difference. First operand 3985 states and 5552 transitions. Second operand 6 states. [2020-12-22 07:32:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:41,805 INFO L93 Difference]: Finished difference Result 12435 states and 17381 transitions. [2020-12-22 07:32:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:41,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:41,860 INFO L225 Difference]: With dead ends: 12435 [2020-12-22 07:32:41,861 INFO L226 Difference]: Without dead ends: 10457 [2020-12-22 07:32:41,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 07:32:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2020-12-22 07:32:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 6937. [2020-12-22 07:32:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 07:32:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 9632 transitions. [2020-12-22 07:32:42,421 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 9632 transitions. Word has length 78 [2020-12-22 07:32:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:42,422 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 9632 transitions. [2020-12-22 07:32:42,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 9632 transitions. [2020-12-22 07:32:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:42,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:42,425 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:42,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:32:42,425 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 836080987, now seen corresponding path program 1 times [2020-12-22 07:32:42,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:42,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826958831] [2020-12-22 07:32:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:32:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826958831] [2020-12-22 07:32:42,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:42,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312987977] [2020-12-22 07:32:42,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:42,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:42,516 INFO L87 Difference]: Start difference. First operand 6937 states and 9632 transitions. Second operand 6 states. [2020-12-22 07:32:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:43,493 INFO L93 Difference]: Finished difference Result 14411 states and 20125 transitions. [2020-12-22 07:32:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:43,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:43,523 INFO L225 Difference]: With dead ends: 14411 [2020-12-22 07:32:43,523 INFO L226 Difference]: Without dead ends: 12433 [2020-12-22 07:32:43,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 07:32:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12433 states. [2020-12-22 07:32:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12433 to 8913. [2020-12-22 07:32:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8913 states. [2020-12-22 07:32:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8913 states to 8913 states and 12376 transitions. [2020-12-22 07:32:44,215 INFO L78 Accepts]: Start accepts. Automaton has 8913 states and 12376 transitions. Word has length 78 [2020-12-22 07:32:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:44,216 INFO L481 AbstractCegarLoop]: Abstraction has 8913 states and 12376 transitions. [2020-12-22 07:32:44,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8913 states and 12376 transitions. [2020-12-22 07:32:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:44,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:44,219 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:44,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:32:44,220 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2020-12-22 07:32:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073939581] [2020-12-22 07:32:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:44,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073939581] [2020-12-22 07:32:44,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:44,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:44,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041177023] [2020-12-22 07:32:44,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:44,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:44,308 INFO L87 Difference]: Start difference. First operand 8913 states and 12376 transitions. Second operand 6 states. [2020-12-22 07:32:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:45,095 INFO L93 Difference]: Finished difference Result 15507 states and 21637 transitions. [2020-12-22 07:32:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:45,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:45,128 INFO L225 Difference]: With dead ends: 15507 [2020-12-22 07:32:45,128 INFO L226 Difference]: Without dead ends: 13969 [2020-12-22 07:32:45,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 07:32:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2020-12-22 07:32:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10449. [2020-12-22 07:32:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10449 states. [2020-12-22 07:32:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10449 states to 10449 states and 14512 transitions. [2020-12-22 07:32:45,798 INFO L78 Accepts]: Start accepts. Automaton has 10449 states and 14512 transitions. Word has length 78 [2020-12-22 07:32:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:45,798 INFO L481 AbstractCegarLoop]: Abstraction has 10449 states and 14512 transitions. [2020-12-22 07:32:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10449 states and 14512 transitions. [2020-12-22 07:32:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:32:45,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:45,802 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:45,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:32:45,803 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -32257762, now seen corresponding path program 1 times [2020-12-22 07:32:45,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:45,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806136625] [2020-12-22 07:32:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:46,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806136625] [2020-12-22 07:32:46,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641197786] [2020-12-22 07:32:46,048 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 07:32:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:32:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:46,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:46,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2020-12-22 07:32:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454245200] [2020-12-22 07:32:46,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:32:46,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:32:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:32:46,525 INFO L87 Difference]: Start difference. First operand 10449 states and 14512 transitions. Second operand 14 states. [2020-12-22 07:32:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:52,189 INFO L93 Difference]: Finished difference Result 58157 states and 80368 transitions. [2020-12-22 07:32:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 07:32:52,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-12-22 07:32:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:52,290 INFO L225 Difference]: With dead ends: 58157 [2020-12-22 07:32:52,290 INFO L226 Difference]: Without dead ends: 49723 [2020-12-22 07:32:52,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=641, Invalid=3019, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 07:32:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49723 states. [2020-12-22 07:32:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49723 to 32597. [2020-12-22 07:32:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32597 states. [2020-12-22 07:32:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32597 states to 32597 states and 44808 transitions. [2020-12-22 07:32:54,858 INFO L78 Accepts]: Start accepts. Automaton has 32597 states and 44808 transitions. Word has length 79 [2020-12-22 07:32:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:54,859 INFO L481 AbstractCegarLoop]: Abstraction has 32597 states and 44808 transitions. [2020-12-22 07:32:54,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:32:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32597 states and 44808 transitions. [2020-12-22 07:32:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:32:54,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:54,863 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] [2020-12-22 07:32:55,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:32:55,077 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1395542867, now seen corresponding path program 1 times [2020-12-22 07:32:55,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:55,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979542870] [2020-12-22 07:32:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:55,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979542870] [2020-12-22 07:32:55,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125849448] [2020-12-22 07:32:55,287 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 07:32:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:32:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:55,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:56,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:56,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835460256] [2020-12-22 07:32:56,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:56,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:56,214 INFO L87 Difference]: Start difference. First operand 32597 states and 44808 transitions. Second operand 17 states. [2020-12-22 07:33:03,597 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 07:33:04,405 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 07:33:07,808 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-22 07:33:08,519 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 07:33:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:42,257 INFO L93 Difference]: Finished difference Result 563082 states and 770211 transitions. [2020-12-22 07:33:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-12-22 07:33:42,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 07:33:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:43,700 INFO L225 Difference]: With dead ends: 563082 [2020-12-22 07:33:43,700 INFO L226 Difference]: Without dead ends: 530516 [2020-12-22 07:33:43,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3094, Invalid=21398, Unknown=0, NotChecked=0, Total=24492 [2020-12-22 07:33:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530516 states. [2020-12-22 07:34:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530516 to 180156. [2020-12-22 07:34:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180156 states. [2020-12-22 07:34:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180156 states to 180156 states and 245522 transitions. [2020-12-22 07:34:01,609 INFO L78 Accepts]: Start accepts. Automaton has 180156 states and 245522 transitions. Word has length 80 [2020-12-22 07:34:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:01,609 INFO L481 AbstractCegarLoop]: Abstraction has 180156 states and 245522 transitions. [2020-12-22 07:34:01,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:34:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 180156 states and 245522 transitions. [2020-12-22 07:34:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:01,618 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] [2020-12-22 07:34:01,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:34:01,833 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 843002779, now seen corresponding path program 1 times [2020-12-22 07:34:01,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:01,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300490850] [2020-12-22 07:34:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:01,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300490850] [2020-12-22 07:34:01,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:01,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:01,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958785997] [2020-12-22 07:34:01,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:01,891 INFO L87 Difference]: Start difference. First operand 180156 states and 245522 transitions. Second operand 3 states. [2020-12-22 07:34:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:15,794 INFO L93 Difference]: Finished difference Result 360283 states and 491014 transitions. [2020-12-22 07:34:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:15,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:16,206 INFO L225 Difference]: With dead ends: 360283 [2020-12-22 07:34:16,206 INFO L226 Difference]: Without dead ends: 180158 [2020-12-22 07:34:16,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180158 states. [2020-12-22 07:34:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180158 to 176412. [2020-12-22 07:34:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176412 states. [2020-12-22 07:34:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176412 states to 176412 states and 236834 transitions. [2020-12-22 07:34:30,399 INFO L78 Accepts]: Start accepts. Automaton has 176412 states and 236834 transitions. Word has length 80 [2020-12-22 07:34:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:30,400 INFO L481 AbstractCegarLoop]: Abstraction has 176412 states and 236834 transitions. [2020-12-22 07:34:30,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 176412 states and 236834 transitions. [2020-12-22 07:34:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:30,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:30,417 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] [2020-12-22 07:34:30,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:34:30,418 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash 569315067, now seen corresponding path program 1 times [2020-12-22 07:34:30,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:30,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134044964] [2020-12-22 07:34:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:30,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134044964] [2020-12-22 07:34:30,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:30,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:30,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133078610] [2020-12-22 07:34:30,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:30,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:30,507 INFO L87 Difference]: Start difference. First operand 176412 states and 236834 transitions. Second operand 3 states. [2020-12-22 07:34:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:38,131 INFO L93 Difference]: Finished difference Result 275281 states and 369102 transitions. [2020-12-22 07:34:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:38,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:38,282 INFO L225 Difference]: With dead ends: 275281 [2020-12-22 07:34:38,282 INFO L226 Difference]: Without dead ends: 98900 [2020-12-22 07:34:38,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98900 states. [2020-12-22 07:34:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98900 to 95874. [2020-12-22 07:34:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95874 states. [2020-12-22 07:34:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95874 states to 95874 states and 125902 transitions. [2020-12-22 07:34:45,800 INFO L78 Accepts]: Start accepts. Automaton has 95874 states and 125902 transitions. Word has length 80 [2020-12-22 07:34:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:45,801 INFO L481 AbstractCegarLoop]: Abstraction has 95874 states and 125902 transitions. [2020-12-22 07:34:45,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 95874 states and 125902 transitions. [2020-12-22 07:34:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:45,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:45,804 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] [2020-12-22 07:34:45,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:34:45,805 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 493150811, now seen corresponding path program 1 times [2020-12-22 07:34:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:45,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91224789] [2020-12-22 07:34:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:45,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91224789] [2020-12-22 07:34:45,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:45,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:45,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242649430] [2020-12-22 07:34:45,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:45,855 INFO L87 Difference]: Start difference. First operand 95874 states and 125902 transitions. Second operand 3 states. [2020-12-22 07:34:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:49,235 INFO L93 Difference]: Finished difference Result 136348 states and 178589 transitions. [2020-12-22 07:34:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:49,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:49,278 INFO L225 Difference]: With dead ends: 136348 [2020-12-22 07:34:49,278 INFO L226 Difference]: Without dead ends: 40505 [2020-12-22 07:34:49,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40505 states.