/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.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:33:31,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:33:31,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:33:31,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:33:31,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:33:31,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:33:31,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:33:31,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:33:31,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:33:31,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:33:31,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:33:31,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 08:33:31,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:33:31,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:33:31,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:33:31,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:33:31,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:33:31,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:33:31,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:33:31,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:33:31,517 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:33:31,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:33:31,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:33:31,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:33:31,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:33:31,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:33:31,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:33:31,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:33:31,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:33:31,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:33:31,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:33:31,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:33:31,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:33:31,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:33:31,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:33:31,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:33:31,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:33:31,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:33:31,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:33:31,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:33:31,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:33:31,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:33:31,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:33:31,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:33:31,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:33:31,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:33:31,976 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:33:31,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-12-22 08:33:32,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c00bbcd2/1eb73a77e837431d800043a261a460ee/FLAGbb99e0210 [2020-12-22 08:33:32,824 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:33:32,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-12-22 08:33:32,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c00bbcd2/1eb73a77e837431d800043a261a460ee/FLAGbb99e0210 [2020-12-22 08:33:33,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c00bbcd2/1eb73a77e837431d800043a261a460ee [2020-12-22 08:33:33,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:33:33,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:33:33,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:33:33,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:33:33,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:33:33,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:33" (1/1) ... [2020-12-22 08:33:33,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419b9548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:33, skipping insertion in model container [2020-12-22 08:33:33,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:33" (1/1) ... [2020-12-22 08:33:33,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:33:33,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:33:33,651 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.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[14960,14973] [2020-12-22 08:33:33,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:33:33,824 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:33:33,951 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.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[14960,14973] [2020-12-22 08:33:34,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:33:34,089 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:33:34,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34 WrapperNode [2020-12-22 08:33:34,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:33:34,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:33:34,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:33:34,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:33:34,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:33:34,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:33:34,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:33:34,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:33:34,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... [2020-12-22 08:33:34,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:33:34,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:33:34,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:33:34,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:33:34,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:33:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:33:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:33:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:33:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:33:36,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:33:36,061 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:33:36,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:36 BoogieIcfgContainer [2020-12-22 08:33:36,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:33:36,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:33:36,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:33:36,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:33:36,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:33:33" (1/3) ... [2020-12-22 08:33:36,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d721e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:36, skipping insertion in model container [2020-12-22 08:33:36,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:34" (2/3) ... [2020-12-22 08:33:36,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d721e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:36, skipping insertion in model container [2020-12-22 08:33:36,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:36" (3/3) ... [2020-12-22 08:33:36,073 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-12-22 08:33:36,080 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:33:36,085 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:33:36,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:33:36,133 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:33:36,134 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:33:36,134 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:33:36,134 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:33:36,134 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:33:36,134 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:33:36,134 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:33:36,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:33:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states. [2020-12-22 08:33:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 08:33:36,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:36,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:36,181 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1982597538, now seen corresponding path program 1 times [2020-12-22 08:33:36,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:36,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067603603] [2020-12-22 08:33:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:36,639 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 08:33:36,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067603603] [2020-12-22 08:33:36,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:36,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:33:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403003498] [2020-12-22 08:33:36,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:33:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:33:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:33:36,664 INFO L87 Difference]: Start difference. First operand 487 states. Second operand 4 states. [2020-12-22 08:33:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:36,883 INFO L93 Difference]: Finished difference Result 937 states and 1520 transitions. [2020-12-22 08:33:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:33:36,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 08:33:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:36,909 INFO L225 Difference]: With dead ends: 937 [2020-12-22 08:33:36,909 INFO L226 Difference]: Without dead ends: 484 [2020-12-22 08:33:36,916 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 08:33:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-22 08:33:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2020-12-22 08:33:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-12-22 08:33:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 748 transitions. [2020-12-22 08:33:37,002 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 748 transitions. Word has length 119 [2020-12-22 08:33:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:37,003 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 748 transitions. [2020-12-22 08:33:37,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:33:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 748 transitions. [2020-12-22 08:33:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 08:33:37,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:37,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:37,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:33:37,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1369129713, now seen corresponding path program 1 times [2020-12-22 08:33:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:37,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575296817] [2020-12-22 08:33:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:37,352 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 08:33:37,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575296817] [2020-12-22 08:33:37,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:37,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151905437] [2020-12-22 08:33:37,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:37,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:37,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:37,360 INFO L87 Difference]: Start difference. First operand 484 states and 748 transitions. Second operand 3 states. [2020-12-22 08:33:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:37,470 INFO L93 Difference]: Finished difference Result 1159 states and 1827 transitions. [2020-12-22 08:33:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:37,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-12-22 08:33:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:37,479 INFO L225 Difference]: With dead ends: 1159 [2020-12-22 08:33:37,480 INFO L226 Difference]: Without dead ends: 746 [2020-12-22 08:33:37,485 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 08:33:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-12-22 08:33:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 744. [2020-12-22 08:33:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-12-22 08:33:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1161 transitions. [2020-12-22 08:33:37,561 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1161 transitions. Word has length 159 [2020-12-22 08:33:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:37,563 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1161 transitions. [2020-12-22 08:33:37,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1161 transitions. [2020-12-22 08:33:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 08:33:37,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:37,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:37,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:33:37,569 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:37,572 INFO L82 PathProgramCache]: Analyzing trace with hash -319550929, now seen corresponding path program 1 times [2020-12-22 08:33:37,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:37,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258855790] [2020-12-22 08:33:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:37,780 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 08:33:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258855790] [2020-12-22 08:33:37,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:37,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648087169] [2020-12-22 08:33:37,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:37,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:37,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:37,787 INFO L87 Difference]: Start difference. First operand 744 states and 1161 transitions. Second operand 3 states. [2020-12-22 08:33:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:37,876 INFO L93 Difference]: Finished difference Result 1863 states and 2947 transitions. [2020-12-22 08:33:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:37,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-12-22 08:33:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:37,885 INFO L225 Difference]: With dead ends: 1863 [2020-12-22 08:33:37,885 INFO L226 Difference]: Without dead ends: 1203 [2020-12-22 08:33:37,887 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 08:33:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2020-12-22 08:33:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1201. [2020-12-22 08:33:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2020-12-22 08:33:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1885 transitions. [2020-12-22 08:33:37,949 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1885 transitions. Word has length 161 [2020-12-22 08:33:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:37,957 INFO L481 AbstractCegarLoop]: Abstraction has 1201 states and 1885 transitions. [2020-12-22 08:33:37,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1885 transitions. [2020-12-22 08:33:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:33:37,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:37,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:33:37,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:33:37,966 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1930829335, now seen corresponding path program 1 times [2020-12-22 08:33:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:37,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114105048] [2020-12-22 08:33:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:38,130 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 08:33:38,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114105048] [2020-12-22 08:33:38,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:38,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:38,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705220480] [2020-12-22 08:33:38,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:38,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:38,135 INFO L87 Difference]: Start difference. First operand 1201 states and 1885 transitions. Second operand 3 states. [2020-12-22 08:33:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:38,289 INFO L93 Difference]: Finished difference Result 3090 states and 4890 transitions. [2020-12-22 08:33:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:38,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 08:33:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:38,307 INFO L225 Difference]: With dead ends: 3090 [2020-12-22 08:33:38,307 INFO L226 Difference]: Without dead ends: 1986 [2020-12-22 08:33:38,311 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 08:33:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2020-12-22 08:33:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1984. [2020-12-22 08:33:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1984 states. [2020-12-22 08:33:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3119 transitions. [2020-12-22 08:33:38,450 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3119 transitions. Word has length 163 [2020-12-22 08:33:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:38,451 INFO L481 AbstractCegarLoop]: Abstraction has 1984 states and 3119 transitions. [2020-12-22 08:33:38,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3119 transitions. [2020-12-22 08:33:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 08:33:38,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:38,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:38,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:33:38,464 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash -329393929, now seen corresponding path program 1 times [2020-12-22 08:33:38,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:38,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47447136] [2020-12-22 08:33:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:38,694 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 08:33:38,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47447136] [2020-12-22 08:33:38,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:38,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836656174] [2020-12-22 08:33:38,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:38,698 INFO L87 Difference]: Start difference. First operand 1984 states and 3119 transitions. Second operand 3 states. [2020-12-22 08:33:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:38,918 INFO L93 Difference]: Finished difference Result 5159 states and 8143 transitions. [2020-12-22 08:33:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:38,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2020-12-22 08:33:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:38,939 INFO L225 Difference]: With dead ends: 5159 [2020-12-22 08:33:38,939 INFO L226 Difference]: Without dead ends: 3285 [2020-12-22 08:33:38,943 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 08:33:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2020-12-22 08:33:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 3283. [2020-12-22 08:33:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3283 states. [2020-12-22 08:33:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 5149 transitions. [2020-12-22 08:33:39,141 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 5149 transitions. Word has length 165 [2020-12-22 08:33:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:39,142 INFO L481 AbstractCegarLoop]: Abstraction has 3283 states and 5149 transitions. [2020-12-22 08:33:39,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 5149 transitions. [2020-12-22 08:33:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 08:33:39,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:39,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:33:39,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:33:39,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1942661269, now seen corresponding path program 1 times [2020-12-22 08:33:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:39,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479708385] [2020-12-22 08:33:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:39,307 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 08:33:39,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479708385] [2020-12-22 08:33:39,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:39,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745623043] [2020-12-22 08:33:39,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:39,310 INFO L87 Difference]: Start difference. First operand 3283 states and 5149 transitions. Second operand 3 states. [2020-12-22 08:33:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:39,605 INFO L93 Difference]: Finished difference Result 8504 states and 13344 transitions. [2020-12-22 08:33:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:39,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2020-12-22 08:33:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:39,635 INFO L225 Difference]: With dead ends: 8504 [2020-12-22 08:33:39,636 INFO L226 Difference]: Without dead ends: 5344 [2020-12-22 08:33:39,643 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 08:33:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2020-12-22 08:33:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 5342. [2020-12-22 08:33:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5342 states. [2020-12-22 08:33:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 8323 transitions. [2020-12-22 08:33:40,019 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 8323 transitions. Word has length 167 [2020-12-22 08:33:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:40,020 INFO L481 AbstractCegarLoop]: Abstraction has 5342 states and 8323 transitions. [2020-12-22 08:33:40,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 8323 transitions. [2020-12-22 08:33:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:33:40,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:40,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:40,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:33:40,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash 667335103, now seen corresponding path program 1 times [2020-12-22 08:33:40,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:40,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926996636] [2020-12-22 08:33:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:33:40,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926996636] [2020-12-22 08:33:40,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:40,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:33:40,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171532482] [2020-12-22 08:33:40,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:33:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:33:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:33:40,516 INFO L87 Difference]: Start difference. First operand 5342 states and 8323 transitions. Second operand 8 states. [2020-12-22 08:33:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:42,874 INFO L93 Difference]: Finished difference Result 32189 states and 49879 transitions. [2020-12-22 08:33:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:33:42,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 169 [2020-12-22 08:33:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:42,974 INFO L225 Difference]: With dead ends: 32189 [2020-12-22 08:33:42,974 INFO L226 Difference]: Without dead ends: 26964 [2020-12-22 08:33:42,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:33:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26964 states. [2020-12-22 08:33:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26964 to 26954. [2020-12-22 08:33:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26954 states. [2020-12-22 08:33:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26954 states to 26954 states and 41606 transitions. [2020-12-22 08:33:45,002 INFO L78 Accepts]: Start accepts. Automaton has 26954 states and 41606 transitions. Word has length 169 [2020-12-22 08:33:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:45,002 INFO L481 AbstractCegarLoop]: Abstraction has 26954 states and 41606 transitions. [2020-12-22 08:33:45,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:33:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 26954 states and 41606 transitions. [2020-12-22 08:33:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:33:45,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:45,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:45,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:33:45,070 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:45,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2083927149, now seen corresponding path program 1 times [2020-12-22 08:33:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:45,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90956735] [2020-12-22 08:33:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:45,157 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 08:33:45,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90956735] [2020-12-22 08:33:45,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:45,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288360828] [2020-12-22 08:33:45,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:45,160 INFO L87 Difference]: Start difference. First operand 26954 states and 41606 transitions. Second operand 3 states. [2020-12-22 08:33:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:47,428 INFO L93 Difference]: Finished difference Result 76205 states and 117305 transitions. [2020-12-22 08:33:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:47,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-12-22 08:33:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:47,541 INFO L225 Difference]: With dead ends: 76205 [2020-12-22 08:33:47,542 INFO L226 Difference]: Without dead ends: 49305 [2020-12-22 08:33:47,578 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 08:33:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49305 states. [2020-12-22 08:33:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49305 to 49303. [2020-12-22 08:33:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49303 states. [2020-12-22 08:33:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49303 states to 49303 states and 75371 transitions. [2020-12-22 08:33:50,127 INFO L78 Accepts]: Start accepts. Automaton has 49303 states and 75371 transitions. Word has length 169 [2020-12-22 08:33:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:50,127 INFO L481 AbstractCegarLoop]: Abstraction has 49303 states and 75371 transitions. [2020-12-22 08:33:50,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49303 states and 75371 transitions. [2020-12-22 08:33:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:33:50,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:50,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:50,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:33:50,245 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:50,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1875273560, now seen corresponding path program 1 times [2020-12-22 08:33:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:50,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746624357] [2020-12-22 08:33:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:50,408 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 08:33:50,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746624357] [2020-12-22 08:33:50,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:50,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131192087] [2020-12-22 08:33:50,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:50,419 INFO L87 Difference]: Start difference. First operand 49303 states and 75371 transitions. Second operand 3 states. [2020-12-22 08:33:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:53,741 INFO L93 Difference]: Finished difference Result 118431 states and 180999 transitions. [2020-12-22 08:33:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:33:53,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:33:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:53,906 INFO L225 Difference]: With dead ends: 118431 [2020-12-22 08:33:53,906 INFO L226 Difference]: Without dead ends: 84449 [2020-12-22 08:33:53,956 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 08:33:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84449 states. [2020-12-22 08:33:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84449 to 84447. [2020-12-22 08:33:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84447 states. [2020-12-22 08:33:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84447 states to 84447 states and 128225 transitions. [2020-12-22 08:33:58,388 INFO L78 Accepts]: Start accepts. Automaton has 84447 states and 128225 transitions. Word has length 172 [2020-12-22 08:33:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:58,389 INFO L481 AbstractCegarLoop]: Abstraction has 84447 states and 128225 transitions. [2020-12-22 08:33:58,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:33:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 84447 states and 128225 transitions. [2020-12-22 08:33:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:33:58,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:58,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:58,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:33:58,517 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1593707843, now seen corresponding path program 1 times [2020-12-22 08:33:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:58,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075201637] [2020-12-22 08:33:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:58,660 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 08:33:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075201637] [2020-12-22 08:33:58,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:58,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:33:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077888499] [2020-12-22 08:33:58,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:33:58,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:58,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:33:58,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:33:58,663 INFO L87 Difference]: Start difference. First operand 84447 states and 128225 transitions. Second operand 3 states. [2020-12-22 08:34:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:03,640 INFO L93 Difference]: Finished difference Result 184645 states and 280219 transitions. [2020-12-22 08:34:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:34:03,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:34:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:03,977 INFO L225 Difference]: With dead ends: 184645 [2020-12-22 08:34:03,978 INFO L226 Difference]: Without dead ends: 134827 [2020-12-22 08:34:04,067 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 08:34:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134827 states. [2020-12-22 08:34:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134827 to 134825. [2020-12-22 08:34:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134825 states. [2020-12-22 08:34:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134825 states to 134825 states and 203289 transitions. [2020-12-22 08:34:10,465 INFO L78 Accepts]: Start accepts. Automaton has 134825 states and 203289 transitions. Word has length 172 [2020-12-22 08:34:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 134825 states and 203289 transitions. [2020-12-22 08:34:10,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:34:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 134825 states and 203289 transitions. [2020-12-22 08:34:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:34:10,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:34:10,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:10,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:34:10,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:34:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:34:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1669075814, now seen corresponding path program 1 times [2020-12-22 08:34:10,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:34:10,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401686530] [2020-12-22 08:34:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:34:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:34:10,754 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 08:34:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401686530] [2020-12-22 08:34:10,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:34:10,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:34:10,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966091809] [2020-12-22 08:34:10,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:34:10,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:34:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:34:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:34:10,758 INFO L87 Difference]: Start difference. First operand 134825 states and 203289 transitions. Second operand 3 states. [2020-12-22 08:34:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:18,288 INFO L93 Difference]: Finished difference Result 266005 states and 400359 transitions. [2020-12-22 08:34:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:34:18,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:34:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:18,665 INFO L225 Difference]: With dead ends: 266005 [2020-12-22 08:34:18,666 INFO L226 Difference]: Without dead ends: 201491 [2020-12-22 08:34:18,796 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 08:34:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201491 states. [2020-12-22 08:34:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201491 to 201489. [2020-12-22 08:34:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201489 states. [2020-12-22 08:34:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201489 states to 201489 states and 301349 transitions. [2020-12-22 08:34:28,171 INFO L78 Accepts]: Start accepts. Automaton has 201489 states and 301349 transitions. Word has length 172 [2020-12-22 08:34:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:28,172 INFO L481 AbstractCegarLoop]: Abstraction has 201489 states and 301349 transitions. [2020-12-22 08:34:28,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:34:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 201489 states and 301349 transitions. [2020-12-22 08:34:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:34:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:34:28,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:34:28,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:34:28,884 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:34:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:34:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash -981029133, now seen corresponding path program 1 times [2020-12-22 08:34:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:34:28,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266072451] [2020-12-22 08:34:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:34:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:34:28,992 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 08:34:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266072451] [2020-12-22 08:34:28,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:34:28,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:34:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872217877] [2020-12-22 08:34:28,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:34:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:34:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:34:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:34:28,996 INFO L87 Difference]: Start difference. First operand 201489 states and 301349 transitions. Second operand 3 states. [2020-12-22 08:34:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:41,883 INFO L93 Difference]: Finished difference Result 549195 states and 819392 transitions. [2020-12-22 08:34:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:34:41,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-12-22 08:34:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:42,539 INFO L225 Difference]: With dead ends: 549195 [2020-12-22 08:34:42,539 INFO L226 Difference]: Without dead ends: 356003 [2020-12-22 08:34:42,776 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 08:34:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356003 states. [2020-12-22 08:34:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356003 to 356001. [2020-12-22 08:34:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356001 states. [2020-12-22 08:34:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356001 states to 356001 states and 527498 transitions. [2020-12-22 08:34:59,735 INFO L78 Accepts]: Start accepts. Automaton has 356001 states and 527498 transitions. Word has length 173 [2020-12-22 08:34:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:59,735 INFO L481 AbstractCegarLoop]: Abstraction has 356001 states and 527498 transitions. [2020-12-22 08:34:59,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:34:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 356001 states and 527498 transitions. [2020-12-22 08:35:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:35:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:00,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:00,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:35:00,189 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash 4923423, now seen corresponding path program 1 times [2020-12-22 08:35:00,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:00,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283070623] [2020-12-22 08:35:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:00,339 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 08:35:00,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283070623] [2020-12-22 08:35:00,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:00,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:00,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093670854] [2020-12-22 08:35:00,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:35:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:35:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:35:00,342 INFO L87 Difference]: Start difference. First operand 356001 states and 527498 transitions. Second operand 6 states. [2020-12-22 08:35:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:40,547 INFO L93 Difference]: Finished difference Result 1219126 states and 1799893 transitions. [2020-12-22 08:35:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:40,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-12-22 08:35:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:42,510 INFO L225 Difference]: With dead ends: 1219126 [2020-12-22 08:35:42,510 INFO L226 Difference]: Without dead ends: 863195 [2020-12-22 08:35:43,011 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 08:35:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863195 states.