/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:24:39,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:24:39,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:24:39,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:24:39,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:24:39,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:24:39,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:24:39,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:24:39,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:24:39,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:24:39,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:24:39,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:24:39,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:24:39,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:24:39,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:24:39,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:24:39,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:24:39,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:24:39,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:24:39,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:24:39,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:24:39,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:24:39,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:24:39,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:24:39,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:24:39,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:24:39,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:24:39,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:24:39,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:24:39,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:24:39,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:24:39,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:24:39,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:24:39,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:24:39,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:24:39,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:24:39,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:24:39,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:24:39,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:24:39,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:24:39,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:24:39,513 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:24:39,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:24:39,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:24:39,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:24:39,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:24:39,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:24:39,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:24:39,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:24:39,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:24:39,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:24:39,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:24:39,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:24:39,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:24:39,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:24:39,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:24:39,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:24:39,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:24:39,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:24:39,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:24:39,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:24:39,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:24:39,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:24:39,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:24:39,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:24:39,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:24:39,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:24:39,939 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:24:39,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:24:40,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200df5d22/63ce9429f3a245109f2ecd2923e35051/FLAG3cd5a93e7 [2020-12-22 08:24:40,841 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:24:40,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:24:40,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200df5d22/63ce9429f3a245109f2ecd2923e35051/FLAG3cd5a93e7 [2020-12-22 08:24:41,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200df5d22/63ce9429f3a245109f2ecd2923e35051 [2020-12-22 08:24:41,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:24:41,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:24:41,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:41,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:24:41,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:24:41,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb84f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41, skipping insertion in model container [2020-12-22 08:24:41,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:24:41,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:24:41,446 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6703,6716] [2020-12-22 08:24:41,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:41,544 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:24:41,606 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6703,6716] [2020-12-22 08:24:41,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:41,690 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:24:41,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41 WrapperNode [2020-12-22 08:24:41,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:41,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:41,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:24:41,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:24:41,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:41,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:24:41,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:24:41,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:24:41,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... [2020-12-22 08:24:41,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:24:41,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:24:41,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:24:41,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:24:41,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:24:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:24:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:24:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:24:41,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:24:42,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:24:42,948 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:24:42,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:42 BoogieIcfgContainer [2020-12-22 08:24:42,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:24:42,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:24:42,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:24:42,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:24:42,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:24:41" (1/3) ... [2020-12-22 08:24:42,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fe0540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:42, skipping insertion in model container [2020-12-22 08:24:42,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:41" (2/3) ... [2020-12-22 08:24:42,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fe0540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:42, skipping insertion in model container [2020-12-22 08:24:42,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:42" (3/3) ... [2020-12-22 08:24:42,965 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:24:42,973 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:24:42,979 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:24:42,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:24:43,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:24:43,047 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:24:43,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:24:43,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:24:43,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:24:43,048 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:24:43,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:24:43,048 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:24:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-12-22 08:24:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:24:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:43,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:43,080 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1270648051, now seen corresponding path program 1 times [2020-12-22 08:24:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:43,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588827354] [2020-12-22 08:24:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:43,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588827354] [2020-12-22 08:24:43,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:43,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:43,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923202862] [2020-12-22 08:24:43,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:43,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:43,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:43,593 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 3 states. [2020-12-22 08:24:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:43,743 INFO L93 Difference]: Finished difference Result 345 states and 567 transitions. [2020-12-22 08:24:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:43,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:24:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:43,762 INFO L225 Difference]: With dead ends: 345 [2020-12-22 08:24:43,762 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 08:24:43,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 08:24:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2020-12-22 08:24:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-22 08:24:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 388 transitions. [2020-12-22 08:24:43,854 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 388 transitions. Word has length 63 [2020-12-22 08:24:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:43,855 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 388 transitions. [2020-12-22 08:24:43,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 388 transitions. [2020-12-22 08:24:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:24:43,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:43,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:43,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:24:43,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:43,868 INFO L82 PathProgramCache]: Analyzing trace with hash 473041692, now seen corresponding path program 1 times [2020-12-22 08:24:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:43,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686890640] [2020-12-22 08:24:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686890640] [2020-12-22 08:24:44,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:44,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:44,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003917661] [2020-12-22 08:24:44,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:44,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:44,236 INFO L87 Difference]: Start difference. First operand 258 states and 388 transitions. Second operand 6 states. [2020-12-22 08:24:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:44,541 INFO L93 Difference]: Finished difference Result 958 states and 1480 transitions. [2020-12-22 08:24:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:44,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:24:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:44,548 INFO L225 Difference]: With dead ends: 958 [2020-12-22 08:24:44,548 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 08:24:44,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 08:24:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 752. [2020-12-22 08:24:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-12-22 08:24:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1152 transitions. [2020-12-22 08:24:44,620 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1152 transitions. Word has length 64 [2020-12-22 08:24:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:44,620 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 1152 transitions. [2020-12-22 08:24:44,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1152 transitions. [2020-12-22 08:24:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:24:44,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:44,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:44,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:24:44,625 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash -222648813, now seen corresponding path program 1 times [2020-12-22 08:24:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:44,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300111379] [2020-12-22 08:24:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:44,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300111379] [2020-12-22 08:24:44,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:44,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:44,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887464459] [2020-12-22 08:24:44,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:44,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:44,756 INFO L87 Difference]: Start difference. First operand 752 states and 1152 transitions. Second operand 6 states. [2020-12-22 08:24:45,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:45,194 INFO L93 Difference]: Finished difference Result 2516 states and 3915 transitions. [2020-12-22 08:24:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:45,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:24:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:45,211 INFO L225 Difference]: With dead ends: 2516 [2020-12-22 08:24:45,212 INFO L226 Difference]: Without dead ends: 1810 [2020-12-22 08:24:45,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2020-12-22 08:24:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1806. [2020-12-22 08:24:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1806 states. [2020-12-22 08:24:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2801 transitions. [2020-12-22 08:24:45,373 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2801 transitions. Word has length 65 [2020-12-22 08:24:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:45,382 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states and 2801 transitions. [2020-12-22 08:24:45,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2801 transitions. [2020-12-22 08:24:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:24:45,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:45,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:45,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:24:45,394 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1106030069, now seen corresponding path program 1 times [2020-12-22 08:24:45,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59287375] [2020-12-22 08:24:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:45,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59287375] [2020-12-22 08:24:45,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:45,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735165816] [2020-12-22 08:24:45,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:45,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:45,556 INFO L87 Difference]: Start difference. First operand 1806 states and 2801 transitions. Second operand 6 states. [2020-12-22 08:24:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:46,173 INFO L93 Difference]: Finished difference Result 6246 states and 9774 transitions. [2020-12-22 08:24:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:46,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:24:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:46,198 INFO L225 Difference]: With dead ends: 6246 [2020-12-22 08:24:46,198 INFO L226 Difference]: Without dead ends: 4536 [2020-12-22 08:24:46,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2020-12-22 08:24:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4126. [2020-12-22 08:24:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4126 states. [2020-12-22 08:24:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 6424 transitions. [2020-12-22 08:24:46,494 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 6424 transitions. Word has length 65 [2020-12-22 08:24:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:46,494 INFO L481 AbstractCegarLoop]: Abstraction has 4126 states and 6424 transitions. [2020-12-22 08:24:46,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 6424 transitions. [2020-12-22 08:24:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:24:46,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:46,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:46,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:24:46,498 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 244768548, now seen corresponding path program 1 times [2020-12-22 08:24:46,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:46,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316872690] [2020-12-22 08:24:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316872690] [2020-12-22 08:24:46,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:46,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597647886] [2020-12-22 08:24:46,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:46,680 INFO L87 Difference]: Start difference. First operand 4126 states and 6424 transitions. Second operand 6 states. [2020-12-22 08:24:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:47,708 INFO L93 Difference]: Finished difference Result 15475 states and 24159 transitions. [2020-12-22 08:24:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:47,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:24:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:47,767 INFO L225 Difference]: With dead ends: 15475 [2020-12-22 08:24:47,767 INFO L226 Difference]: Without dead ends: 11418 [2020-12-22 08:24:47,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11418 states. [2020-12-22 08:24:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11418 to 11414. [2020-12-22 08:24:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11414 states. [2020-12-22 08:24:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 17736 transitions. [2020-12-22 08:24:48,622 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 17736 transitions. Word has length 65 [2020-12-22 08:24:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:48,623 INFO L481 AbstractCegarLoop]: Abstraction has 11414 states and 17736 transitions. [2020-12-22 08:24:48,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 17736 transitions. [2020-12-22 08:24:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:24:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:48,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:48,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:24:48,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2050472616, now seen corresponding path program 1 times [2020-12-22 08:24:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:48,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487202695] [2020-12-22 08:24:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:48,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487202695] [2020-12-22 08:24:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:48,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249255316] [2020-12-22 08:24:48,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:48,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:48,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:48,785 INFO L87 Difference]: Start difference. First operand 11414 states and 17736 transitions. Second operand 5 states. [2020-12-22 08:24:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:50,127 INFO L93 Difference]: Finished difference Result 21040 states and 32458 transitions. [2020-12-22 08:24:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:50,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:24:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:50,211 INFO L225 Difference]: With dead ends: 21040 [2020-12-22 08:24:50,211 INFO L226 Difference]: Without dead ends: 21038 [2020-12-22 08:24:50,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21038 states. [2020-12-22 08:24:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21038 to 11612. [2020-12-22 08:24:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11612 states. [2020-12-22 08:24:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11612 states to 11612 states and 17934 transitions. [2020-12-22 08:24:51,383 INFO L78 Accepts]: Start accepts. Automaton has 11612 states and 17934 transitions. Word has length 66 [2020-12-22 08:24:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:51,384 INFO L481 AbstractCegarLoop]: Abstraction has 11612 states and 17934 transitions. [2020-12-22 08:24:51,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:24:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 11612 states and 17934 transitions. [2020-12-22 08:24:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:24:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:51,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:51,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:24:51,389 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -598564162, now seen corresponding path program 1 times [2020-12-22 08:24:51,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:51,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259485646] [2020-12-22 08:24:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:51,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259485646] [2020-12-22 08:24:51,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:51,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:24:51,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827126225] [2020-12-22 08:24:51,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:24:51,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:24:51,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:24:51,730 INFO L87 Difference]: Start difference. First operand 11612 states and 17934 transitions. Second operand 10 states. [2020-12-22 08:24:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:57,830 INFO L93 Difference]: Finished difference Result 70277 states and 108533 transitions. [2020-12-22 08:24:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:24:57,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-12-22 08:24:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:58,055 INFO L225 Difference]: With dead ends: 70277 [2020-12-22 08:24:58,056 INFO L226 Difference]: Without dead ends: 62835 [2020-12-22 08:24:58,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:24:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62835 states. [2020-12-22 08:24:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62835 to 11725. [2020-12-22 08:24:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11725 states. [2020-12-22 08:24:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 18079 transitions. [2020-12-22 08:24:59,962 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 18079 transitions. Word has length 67 [2020-12-22 08:24:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:59,962 INFO L481 AbstractCegarLoop]: Abstraction has 11725 states and 18079 transitions. [2020-12-22 08:24:59,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:24:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 18079 transitions. [2020-12-22 08:24:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:24:59,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:59,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:59,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:24:59,966 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash -354598274, now seen corresponding path program 1 times [2020-12-22 08:24:59,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:59,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908745765] [2020-12-22 08:24:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:00,224 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-12-22 08:25:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:00,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908745765] [2020-12-22 08:25:00,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:00,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:25:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140037729] [2020-12-22 08:25:00,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:25:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:25:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:25:00,364 INFO L87 Difference]: Start difference. First operand 11725 states and 18079 transitions. Second operand 10 states. [2020-12-22 08:25:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:06,524 INFO L93 Difference]: Finished difference Result 46982 states and 72196 transitions. [2020-12-22 08:25:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 08:25:06,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-12-22 08:25:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:06,637 INFO L225 Difference]: With dead ends: 46982 [2020-12-22 08:25:06,638 INFO L226 Difference]: Without dead ends: 44518 [2020-12-22 08:25:06,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 08:25:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44518 states. [2020-12-22 08:25:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44518 to 11725. [2020-12-22 08:25:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11725 states. [2020-12-22 08:25:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 18077 transitions. [2020-12-22 08:25:08,091 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 18077 transitions. Word has length 67 [2020-12-22 08:25:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:08,092 INFO L481 AbstractCegarLoop]: Abstraction has 11725 states and 18077 transitions. [2020-12-22 08:25:08,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:25:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 18077 transitions. [2020-12-22 08:25:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:08,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:08,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:25:08,095 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash 878399134, now seen corresponding path program 1 times [2020-12-22 08:25:08,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:08,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387615464] [2020-12-22 08:25:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:08,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387615464] [2020-12-22 08:25:08,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:08,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:25:08,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911624947] [2020-12-22 08:25:08,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:25:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:08,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:25:08,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:25:08,409 INFO L87 Difference]: Start difference. First operand 11725 states and 18077 transitions. Second operand 10 states. [2020-12-22 08:25:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:15,715 INFO L93 Difference]: Finished difference Result 54650 states and 84169 transitions. [2020-12-22 08:25:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:25:15,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-12-22 08:25:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:15,800 INFO L225 Difference]: With dead ends: 54650 [2020-12-22 08:25:15,801 INFO L226 Difference]: Without dead ends: 50226 [2020-12-22 08:25:15,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:25:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50226 states. [2020-12-22 08:25:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50226 to 11942. [2020-12-22 08:25:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11942 states. [2020-12-22 08:25:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11942 states to 11942 states and 18355 transitions. [2020-12-22 08:25:17,522 INFO L78 Accepts]: Start accepts. Automaton has 11942 states and 18355 transitions. Word has length 67 [2020-12-22 08:25:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:17,522 INFO L481 AbstractCegarLoop]: Abstraction has 11942 states and 18355 transitions. [2020-12-22 08:25:17,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:25:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11942 states and 18355 transitions. [2020-12-22 08:25:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:17,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:17,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:17,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:25:17,527 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:17,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1495323364, now seen corresponding path program 1 times [2020-12-22 08:25:17,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:17,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652324599] [2020-12-22 08:25:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:17,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652324599] [2020-12-22 08:25:17,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:17,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:25:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088715155] [2020-12-22 08:25:17,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:25:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:25:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:25:17,596 INFO L87 Difference]: Start difference. First operand 11942 states and 18355 transitions. Second operand 5 states. [2020-12-22 08:25:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:20,333 INFO L93 Difference]: Finished difference Result 32581 states and 50133 transitions. [2020-12-22 08:25:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:20,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:25:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:20,364 INFO L225 Difference]: With dead ends: 32581 [2020-12-22 08:25:20,364 INFO L226 Difference]: Without dead ends: 20687 [2020-12-22 08:25:20,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20687 states. [2020-12-22 08:25:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20687 to 20685. [2020-12-22 08:25:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20685 states. [2020-12-22 08:25:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20685 states to 20685 states and 31632 transitions. [2020-12-22 08:25:22,561 INFO L78 Accepts]: Start accepts. Automaton has 20685 states and 31632 transitions. Word has length 67 [2020-12-22 08:25:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:22,562 INFO L481 AbstractCegarLoop]: Abstraction has 20685 states and 31632 transitions. [2020-12-22 08:25:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:25:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20685 states and 31632 transitions. [2020-12-22 08:25:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:25:22,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:22,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:22,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:25:22,567 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1249029969, now seen corresponding path program 1 times [2020-12-22 08:25:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:22,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142877053] [2020-12-22 08:25:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:22,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142877053] [2020-12-22 08:25:22,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:22,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:25:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938604668] [2020-12-22 08:25:22,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:25:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:25:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:25:22,703 INFO L87 Difference]: Start difference. First operand 20685 states and 31632 transitions. Second operand 4 states. [2020-12-22 08:25:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:26,876 INFO L93 Difference]: Finished difference Result 56209 states and 85913 transitions. [2020-12-22 08:25:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:26,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-12-22 08:25:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:26,921 INFO L225 Difference]: With dead ends: 56209 [2020-12-22 08:25:26,922 INFO L226 Difference]: Without dead ends: 36923 [2020-12-22 08:25:26,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:25:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36923 states. [2020-12-22 08:25:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36923 to 36597. [2020-12-22 08:25:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36597 states. [2020-12-22 08:25:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36597 states to 36597 states and 55362 transitions. [2020-12-22 08:25:31,356 INFO L78 Accepts]: Start accepts. Automaton has 36597 states and 55362 transitions. Word has length 68 [2020-12-22 08:25:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:31,356 INFO L481 AbstractCegarLoop]: Abstraction has 36597 states and 55362 transitions. [2020-12-22 08:25:31,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:25:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36597 states and 55362 transitions. [2020-12-22 08:25:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:25:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:31,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:31,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:25:31,430 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash -264834943, now seen corresponding path program 1 times [2020-12-22 08:25:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:31,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964769215] [2020-12-22 08:25:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:31,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964769215] [2020-12-22 08:25:31,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:31,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:31,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058147228] [2020-12-22 08:25:31,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:31,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:31,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:31,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:31,492 INFO L87 Difference]: Start difference. First operand 36597 states and 55362 transitions. Second operand 3 states. [2020-12-22 08:25:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:37,285 INFO L93 Difference]: Finished difference Result 68379 states and 103570 transitions. [2020-12-22 08:25:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:37,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:25:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:37,347 INFO L225 Difference]: With dead ends: 68379 [2020-12-22 08:25:37,347 INFO L226 Difference]: Without dead ends: 47657 [2020-12-22 08:25:37,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47657 states. [2020-12-22 08:25:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47657 to 46911. [2020-12-22 08:25:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46911 states. [2020-12-22 08:25:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46911 states to 46911 states and 70056 transitions. [2020-12-22 08:25:43,186 INFO L78 Accepts]: Start accepts. Automaton has 46911 states and 70056 transitions. Word has length 68 [2020-12-22 08:25:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:43,187 INFO L481 AbstractCegarLoop]: Abstraction has 46911 states and 70056 transitions. [2020-12-22 08:25:43,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46911 states and 70056 transitions. [2020-12-22 08:25:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:25:43,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:43,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:43,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:25:43,192 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -660438559, now seen corresponding path program 1 times [2020-12-22 08:25:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:43,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651360649] [2020-12-22 08:25:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:43,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651360649] [2020-12-22 08:25:43,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:43,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78345782] [2020-12-22 08:25:43,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:43,240 INFO L87 Difference]: Start difference. First operand 46911 states and 70056 transitions. Second operand 3 states. [2020-12-22 08:25:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:51,544 INFO L93 Difference]: Finished difference Result 105134 states and 157096 transitions. [2020-12-22 08:25:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:51,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:25:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:51,638 INFO L225 Difference]: With dead ends: 105134 [2020-12-22 08:25:51,638 INFO L226 Difference]: Without dead ends: 63941 [2020-12-22 08:25:51,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63941 states. [2020-12-22 08:25:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63941 to 45771. [2020-12-22 08:25:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45771 states. [2020-12-22 08:25:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45771 states to 45771 states and 67469 transitions. [2020-12-22 08:25:57,574 INFO L78 Accepts]: Start accepts. Automaton has 45771 states and 67469 transitions. Word has length 68 [2020-12-22 08:25:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:57,574 INFO L481 AbstractCegarLoop]: Abstraction has 45771 states and 67469 transitions. [2020-12-22 08:25:57,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 45771 states and 67469 transitions. [2020-12-22 08:25:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:25:57,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:57,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:57,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:25:57,701 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1777284032, now seen corresponding path program 1 times [2020-12-22 08:25:57,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:57,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092917832] [2020-12-22 08:25:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:57,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092917832] [2020-12-22 08:25:57,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:57,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272700043] [2020-12-22 08:25:57,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:57,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:57,746 INFO L87 Difference]: Start difference. First operand 45771 states and 67469 transitions. Second operand 3 states. [2020-12-22 08:26:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:04,582 INFO L93 Difference]: Finished difference Result 65157 states and 95596 transitions. [2020-12-22 08:26:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:04,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:26:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:04,649 INFO L225 Difference]: With dead ends: 65157 [2020-12-22 08:26:04,649 INFO L226 Difference]: Without dead ends: 52001 [2020-12-22 08:26:04,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52001 states. [2020-12-22 08:26:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52001 to 48669. [2020-12-22 08:26:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48669 states. [2020-12-22 08:26:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48669 states to 48669 states and 70456 transitions. [2020-12-22 08:26:11,262 INFO L78 Accepts]: Start accepts. Automaton has 48669 states and 70456 transitions. Word has length 68 [2020-12-22 08:26:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:11,262 INFO L481 AbstractCegarLoop]: Abstraction has 48669 states and 70456 transitions. [2020-12-22 08:26:11,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 48669 states and 70456 transitions. [2020-12-22 08:26:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:26:11,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:11,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:11,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:26:11,267 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash -450188991, now seen corresponding path program 1 times [2020-12-22 08:26:11,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:11,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211690799] [2020-12-22 08:26:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:11,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211690799] [2020-12-22 08:26:11,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:11,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:11,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521484635] [2020-12-22 08:26:11,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:11,356 INFO L87 Difference]: Start difference. First operand 48669 states and 70456 transitions. Second operand 6 states. [2020-12-22 08:26:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:30,685 INFO L93 Difference]: Finished difference Result 182705 states and 264238 transitions. [2020-12-22 08:26:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:26:30,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 08:26:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:31,096 INFO L225 Difference]: With dead ends: 182705 [2020-12-22 08:26:31,097 INFO L226 Difference]: Without dead ends: 140405 [2020-12-22 08:26:31,160 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 08:26:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140405 states. [2020-12-22 08:26:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140405 to 72847. [2020-12-22 08:26:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72847 states. [2020-12-22 08:26:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72847 states to 72847 states and 105198 transitions. [2020-12-22 08:26:42,345 INFO L78 Accepts]: Start accepts. Automaton has 72847 states and 105198 transitions. Word has length 69 [2020-12-22 08:26:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:42,346 INFO L481 AbstractCegarLoop]: Abstraction has 72847 states and 105198 transitions. [2020-12-22 08:26:42,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:26:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 72847 states and 105198 transitions. [2020-12-22 08:26:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:26:42,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:42,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:42,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:26:42,351 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash 558054915, now seen corresponding path program 1 times [2020-12-22 08:26:42,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:42,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387672426] [2020-12-22 08:26:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:42,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387672426] [2020-12-22 08:26:42,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:42,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:42,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850314851] [2020-12-22 08:26:42,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:42,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:42,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:42,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:42,457 INFO L87 Difference]: Start difference. First operand 72847 states and 105198 transitions. Second operand 6 states. [2020-12-22 08:27:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:07,269 INFO L93 Difference]: Finished difference Result 179866 states and 260464 transitions. [2020-12-22 08:27:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:07,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 08:27:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:07,751 INFO L225 Difference]: With dead ends: 179866 [2020-12-22 08:27:07,751 INFO L226 Difference]: Without dead ends: 167212 [2020-12-22 08:27:07,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167212 states. [2020-12-22 08:27:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167212 to 85919. [2020-12-22 08:27:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85919 states. [2020-12-22 08:27:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85919 states to 85919 states and 124040 transitions. [2020-12-22 08:27:21,917 INFO L78 Accepts]: Start accepts. Automaton has 85919 states and 124040 transitions. Word has length 69 [2020-12-22 08:27:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:21,917 INFO L481 AbstractCegarLoop]: Abstraction has 85919 states and 124040 transitions. [2020-12-22 08:27:21,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 85919 states and 124040 transitions. [2020-12-22 08:27:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:27:21,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:21,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:21,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:27:21,922 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 362024722, now seen corresponding path program 1 times [2020-12-22 08:27:21,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:21,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868416444] [2020-12-22 08:27:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:27:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868416444] [2020-12-22 08:27:22,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:22,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:22,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170658611] [2020-12-22 08:27:22,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:22,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:22,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:22,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:22,049 INFO L87 Difference]: Start difference. First operand 85919 states and 124040 transitions. Second operand 6 states. [2020-12-22 08:27:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:48,531 INFO L93 Difference]: Finished difference Result 193044 states and 279419 transitions. [2020-12-22 08:27:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:48,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 08:27:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:48,823 INFO L225 Difference]: With dead ends: 193044 [2020-12-22 08:27:48,823 INFO L226 Difference]: Without dead ends: 169860 [2020-12-22 08:27:48,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169860 states. [2020-12-22 08:28:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169860 to 96291. [2020-12-22 08:28:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96291 states. [2020-12-22 08:28:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96291 states to 96291 states and 139210 transitions. [2020-12-22 08:28:05,147 INFO L78 Accepts]: Start accepts. Automaton has 96291 states and 139210 transitions. Word has length 69 [2020-12-22 08:28:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:05,147 INFO L481 AbstractCegarLoop]: Abstraction has 96291 states and 139210 transitions. [2020-12-22 08:28:05,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 96291 states and 139210 transitions. [2020-12-22 08:28:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:28:05,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:05,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:05,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:28:05,151 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1608289607, now seen corresponding path program 1 times [2020-12-22 08:28:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:05,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256471502] [2020-12-22 08:28:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:05,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256471502] [2020-12-22 08:28:05,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:05,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:28:05,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135403188] [2020-12-22 08:28:05,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:05,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:05,279 INFO L87 Difference]: Start difference. First operand 96291 states and 139210 transitions. Second operand 6 states. [2020-12-22 08:28:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:33,299 INFO L93 Difference]: Finished difference Result 215357 states and 311767 transitions. [2020-12-22 08:28:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:28:33,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 08:28:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:33,791 INFO L225 Difference]: With dead ends: 215357 [2020-12-22 08:28:33,791 INFO L226 Difference]: Without dead ends: 168098 [2020-12-22 08:28:33,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 08:28:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168098 states.