/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/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:11,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:11,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:11,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:41:11,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:41:11,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:41:11,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:41:11,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:11,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:11,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:11,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:11,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:11,337 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:11,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:11,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:11,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:11,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:11,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:11,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:11,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:11,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:11,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:11,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:11,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:11,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:11,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:11,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:11,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:11,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:11,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:11,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:11,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:11,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:11,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:11,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:11,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:11,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:11,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:11,891 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:11,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-12-22 03:41:11,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65390677/fc2e2ceaa0aa47c98d30bf04c33196b1/FLAG117d2dc00 [2020-12-22 03:41:12,582 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:12,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-12-22 03:41:12,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65390677/fc2e2ceaa0aa47c98d30bf04c33196b1/FLAG117d2dc00 [2020-12-22 03:41:12,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65390677/fc2e2ceaa0aa47c98d30bf04c33196b1 [2020-12-22 03:41:12,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:12,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:12,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:12,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:12,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:12,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:12" (1/1) ... [2020-12-22 03:41:12,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2db643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:12, skipping insertion in model container [2020-12-22 03:41:12,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:12" (1/1) ... [2020-12-22 03:41:12,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:12,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:13,152 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/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2020-12-22 03:41:13,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:13,169 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:13,187 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/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2020-12-22 03:41:13,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:13,205 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:13,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13 WrapperNode [2020-12-22 03:41:13,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:13,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:13,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:13,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:13,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:13,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:13,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:13,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:13,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (1/1) ... [2020-12-22 03:41:13,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:13,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:13,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:13,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:13,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (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 03:41:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:13,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:13,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:13,633 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 03:41:13,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:13 BoogieIcfgContainer [2020-12-22 03:41:13,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:13,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:13,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:13,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:13,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:12" (1/3) ... [2020-12-22 03:41:13,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba7e475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:13, skipping insertion in model container [2020-12-22 03:41:13,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:13" (2/3) ... [2020-12-22 03:41:13,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba7e475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:13, skipping insertion in model container [2020-12-22 03:41:13,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:13" (3/3) ... [2020-12-22 03:41:13,645 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2020-12-22 03:41:13,652 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:13,657 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:13,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:13,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:13,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:13,715 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:13,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:13,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:13,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:13,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:13,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 03:41:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:41:13,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:13,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:13,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash 207177897, now seen corresponding path program 1 times [2020-12-22 03:41:13,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:13,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080217422] [2020-12-22 03:41:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:13,972 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 03:41:13,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080217422] [2020-12-22 03:41:13,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:13,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:41:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196508573] [2020-12-22 03:41:13,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:41:13,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:41:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:14,001 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-12-22 03:41:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:14,030 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-22 03:41:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:41:14,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 03:41:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:14,046 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:41:14,046 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 03:41:14,049 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 03:41:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 03:41:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 03:41:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 03:41:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 03:41:14,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-22 03:41:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:14,142 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 03:41:14,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:41:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 03:41:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:41:14,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:14,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:14,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:14,147 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 263819657, now seen corresponding path program 1 times [2020-12-22 03:41:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:14,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288752281] [2020-12-22 03:41:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:14,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288752281] [2020-12-22 03:41:14,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379969102] [2020-12-22 03:41:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:41:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:14,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:14,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:41:14,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032217774] [2020-12-22 03:41:14,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:41:14,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:41:14,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:14,506 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2020-12-22 03:41:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:14,533 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-12-22 03:41:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:41:14,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 03:41:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:14,535 INFO L225 Difference]: With dead ends: 19 [2020-12-22 03:41:14,535 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 03:41:14,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 03:41:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 03:41:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:41:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-22 03:41:14,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-22 03:41:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:14,545 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-22 03:41:14,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:41:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-22 03:41:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:14,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:14,549 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:14,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 03:41:14,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2019714217, now seen corresponding path program 2 times [2020-12-22 03:41:14,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:14,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481744113] [2020-12-22 03:41:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 03:41:14,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481744113] [2020-12-22 03:41:14,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:14,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:41:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892479959] [2020-12-22 03:41:14,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:41:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:41:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:41:14,815 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-12-22 03:41:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:14,832 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-22 03:41:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:41:14,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 03:41:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:14,833 INFO L225 Difference]: With dead ends: 16 [2020-12-22 03:41:14,834 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 03:41:14,834 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 03:41:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 03:41:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 03:41:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:41:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 03:41:14,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-12-22 03:41:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:14,838 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 03:41:14,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:41:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 03:41:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:14,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:14,839 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:14,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:41:14,839 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2036724878, now seen corresponding path program 1 times [2020-12-22 03:41:14,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:14,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490130909] [2020-12-22 03:41:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:14,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490130909] [2020-12-22 03:41:14,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382963407] [2020-12-22 03:41:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:41:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:14,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:14,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:41:14,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352510322] [2020-12-22 03:41:14,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:41:14,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:41:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:14,960 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 03:41:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:14,972 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 03:41:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:41:14,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 03:41:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:14,973 INFO L225 Difference]: With dead ends: 20 [2020-12-22 03:41:14,974 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:41:14,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:41:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:41:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:41:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 03:41:14,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-22 03:41:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:14,978 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 03:41:14,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:41:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 03:41:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:41:14,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:14,979 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:15,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:15,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash 634881390, now seen corresponding path program 2 times [2020-12-22 03:41:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:15,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184628850] [2020-12-22 03:41:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184628850] [2020-12-22 03:41:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048976729] [2020-12-22 03:41:15,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:15,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:41:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:41:15,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347323873] [2020-12-22 03:41:15,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:41:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:41:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:15,347 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-12-22 03:41:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:15,360 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-22 03:41:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:41:15,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 03:41:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:15,361 INFO L225 Difference]: With dead ends: 21 [2020-12-22 03:41:15,361 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:41:15,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:41:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:41:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:41:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:41:15,365 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-22 03:41:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:15,366 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:41:15,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:41:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:41:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:15,367 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:15,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:15,573 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 127406222, now seen corresponding path program 3 times [2020-12-22 03:41:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:15,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251264156] [2020-12-22 03:41:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251264156] [2020-12-22 03:41:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157136693] [2020-12-22 03:41:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 03:41:15,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:41:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:15,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:15,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:41:15,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444369523] [2020-12-22 03:41:15,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:41:15,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:41:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:15,741 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-22 03:41:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:15,757 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-22 03:41:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:41:15,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 03:41:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:15,759 INFO L225 Difference]: With dead ends: 22 [2020-12-22 03:41:15,759 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:41:15,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:41:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 03:41:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:41:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 03:41:15,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 03:41:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:15,764 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 03:41:15,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:41:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 03:41:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:41:15,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:15,765 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:15,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:15,980 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1575545198, now seen corresponding path program 4 times [2020-12-22 03:41:15,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:15,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359936054] [2020-12-22 03:41:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359936054] [2020-12-22 03:41:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775185810] [2020-12-22 03:41:16,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:16,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:16,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:41:16,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:16,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:16,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:41:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225128851] [2020-12-22 03:41:16,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:41:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:41:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:16,249 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2020-12-22 03:41:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:16,280 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-22 03:41:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:41:16,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 03:41:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:16,282 INFO L225 Difference]: With dead ends: 23 [2020-12-22 03:41:16,282 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 03:41:16,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 03:41:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 03:41:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:41:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 03:41:16,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-22 03:41:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:16,287 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 03:41:16,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:41:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 03:41:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 03:41:16,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:16,288 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:16,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:41:16,495 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash -776786802, now seen corresponding path program 5 times [2020-12-22 03:41:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:16,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940138054] [2020-12-22 03:41:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940138054] [2020-12-22 03:41:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721192939] [2020-12-22 03:41:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:16,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 03:41:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:41:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:16,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:16,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:41:16,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441030610] [2020-12-22 03:41:16,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:41:16,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:41:16,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:16,754 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-22 03:41:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:16,785 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 03:41:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:41:16,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 03:41:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:16,787 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:41:16,787 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 03:41:16,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 03:41:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 03:41:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 03:41:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 03:41:16,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 03:41:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:16,794 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 03:41:16,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:41:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 03:41:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:41:16,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:16,798 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:17,013 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash -684634770, now seen corresponding path program 6 times [2020-12-22 03:41:17,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:17,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19933977] [2020-12-22 03:41:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:17,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19933977] [2020-12-22 03:41:17,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867946178] [2020-12-22 03:41:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:17,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 03:41:17,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:41:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:17,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:17,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:41:17,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978863620] [2020-12-22 03:41:17,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:41:17,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:41:17,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:17,222 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2020-12-22 03:41:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:17,237 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-22 03:41:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:41:17,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-22 03:41:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:17,238 INFO L225 Difference]: With dead ends: 25 [2020-12-22 03:41:17,238 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 03:41:17,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 03:41:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 03:41:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:41:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 03:41:17,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-22 03:41:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:17,243 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 03:41:17,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:41:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 03:41:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 03:41:17,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:17,244 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:17,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:17,460 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2122889074, now seen corresponding path program 7 times [2020-12-22 03:41:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:17,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017070904] [2020-12-22 03:41:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:17,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017070904] [2020-12-22 03:41:17,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818176034] [2020-12-22 03:41:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:41:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:17,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:17,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:41:17,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375004580] [2020-12-22 03:41:17,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:41:17,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:41:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:17,655 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-22 03:41:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:17,675 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 03:41:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:41:17,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 03:41:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:17,677 INFO L225 Difference]: With dead ends: 26 [2020-12-22 03:41:17,677 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 03:41:17,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 03:41:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 03:41:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:41:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 03:41:17,694 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-22 03:41:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:17,695 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 03:41:17,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:41:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 03:41:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 03:41:17,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:17,696 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:17,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:41:17,897 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash 535867758, now seen corresponding path program 8 times [2020-12-22 03:41:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:17,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782990534] [2020-12-22 03:41:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:18,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782990534] [2020-12-22 03:41:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917331885] [2020-12-22 03:41:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:18,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:41:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:18,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:18,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:41:18,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929504367] [2020-12-22 03:41:18,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:41:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:41:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:18,127 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2020-12-22 03:41:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:18,147 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-22 03:41:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:41:18,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 03:41:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:18,154 INFO L225 Difference]: With dead ends: 27 [2020-12-22 03:41:18,154 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 03:41:18,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 03:41:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 03:41:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:41:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 03:41:18,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-12-22 03:41:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:18,159 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 03:41:18,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:41:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 03:41:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 03:41:18,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:18,160 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:18,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:18,372 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1352950926, now seen corresponding path program 9 times [2020-12-22 03:41:18,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:18,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869384691] [2020-12-22 03:41:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:18,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869384691] [2020-12-22 03:41:18,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008981416] [2020-12-22 03:41:18,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:18,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 03:41:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:41:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:18,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:18,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:41:18,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571165406] [2020-12-22 03:41:18,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:41:18,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:41:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:41:18,623 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-22 03:41:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:18,642 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-22 03:41:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:41:18,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-12-22 03:41:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:18,643 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:41:18,644 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:41:18,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:41:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:41:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 03:41:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:41:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 03:41:18,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-12-22 03:41:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:18,649 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 03:41:18,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:41:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 03:41:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:41:18,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:18,650 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:18,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:18,851 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash 912725358, now seen corresponding path program 10 times [2020-12-22 03:41:18,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:18,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993186107] [2020-12-22 03:41:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:19,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993186107] [2020-12-22 03:41:19,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273520671] [2020-12-22 03:41:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:19,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:19,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:41:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:19,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:41:19,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231008598] [2020-12-22 03:41:19,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:41:19,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:19,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:41:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:41:19,193 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2020-12-22 03:41:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:19,222 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 03:41:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:41:19,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 03:41:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:19,225 INFO L225 Difference]: With dead ends: 29 [2020-12-22 03:41:19,225 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 03:41:19,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:41:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 03:41:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 03:41:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:41:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 03:41:19,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-22 03:41:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:19,234 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 03:41:19,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:41:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 03:41:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:41:19,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:19,239 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:19,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:41:19,454 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:19,455 INFO L82 PathProgramCache]: Analyzing trace with hash 150634638, now seen corresponding path program 11 times [2020-12-22 03:41:19,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:19,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536153761] [2020-12-22 03:41:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536153761] [2020-12-22 03:41:19,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854583553] [2020-12-22 03:41:19,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:19,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 03:41:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:41:19,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:19,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:19,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:41:19,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772812287] [2020-12-22 03:41:19,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:41:19,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:19,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:41:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:41:19,775 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-22 03:41:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:19,803 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 03:41:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:41:19,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 03:41:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:19,806 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:41:19,806 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:41:19,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:41:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:41:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 03:41:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 03:41:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 03:41:19,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-12-22 03:41:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:19,815 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 03:41:19,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:41:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 03:41:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 03:41:19,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:19,817 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:20,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:41:20,026 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:20,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1999341202, now seen corresponding path program 12 times [2020-12-22 03:41:20,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:20,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690292819] [2020-12-22 03:41:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:20,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690292819] [2020-12-22 03:41:20,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268407604] [2020-12-22 03:41:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:20,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 03:41:20,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:41:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:20,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:41:20,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398978337] [2020-12-22 03:41:20,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:41:20,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:41:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:41:20,367 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2020-12-22 03:41:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:20,397 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-22 03:41:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:41:20,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 03:41:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:20,401 INFO L225 Difference]: With dead ends: 31 [2020-12-22 03:41:20,401 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 03:41:20,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:41:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 03:41:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 03:41:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 03:41:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 03:41:20,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-12-22 03:41:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:20,419 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 03:41:20,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:41:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 03:41:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 03:41:20,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:20,420 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:20,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 03:41:20,621 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash 70884494, now seen corresponding path program 13 times [2020-12-22 03:41:20,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:20,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410656514] [2020-12-22 03:41:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410656514] [2020-12-22 03:41:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913846815] [2020-12-22 03:41:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:41:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:20,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:20,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:41:20,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417153066] [2020-12-22 03:41:20,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:41:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:41:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:41:20,982 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-22 03:41:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:21,024 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 03:41:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:41:21,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 03:41:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:21,027 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:41:21,027 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 03:41:21,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:41:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 03:41:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 03:41:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 03:41:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-22 03:41:21,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-12-22 03:41:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:21,035 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-22 03:41:21,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:41:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-22 03:41:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 03:41:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:21,043 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:21,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:21,258 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -176628370, now seen corresponding path program 14 times [2020-12-22 03:41:21,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:21,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626691274] [2020-12-22 03:41:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:21,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626691274] [2020-12-22 03:41:21,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553426286] [2020-12-22 03:41:21,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:21,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:41:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:21,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:21,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:41:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999949720] [2020-12-22 03:41:21,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:41:21,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:41:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:41:21,593 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2020-12-22 03:41:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:21,635 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 03:41:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:41:21,635 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-12-22 03:41:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:21,637 INFO L225 Difference]: With dead ends: 33 [2020-12-22 03:41:21,637 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 03:41:21,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:41:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 03:41:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 03:41:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:41:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 03:41:21,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-12-22 03:41:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:21,647 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 03:41:21,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:41:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 03:41:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 03:41:21,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:21,648 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:21,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:41:21,860 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash 740407438, now seen corresponding path program 15 times [2020-12-22 03:41:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:21,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876341922] [2020-12-22 03:41:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876341922] [2020-12-22 03:41:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101215660] [2020-12-22 03:41:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:22,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 03:41:22,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:41:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:22,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:22,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:41:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393263016] [2020-12-22 03:41:22,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:41:22,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:41:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:41:22,286 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-22 03:41:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:22,308 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 03:41:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:41:22,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-22 03:41:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:22,309 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:41:22,309 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:41:22,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:41:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:41:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 03:41:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 03:41:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 03:41:22,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-12-22 03:41:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:22,315 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 03:41:22,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:41:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 03:41:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:41:22,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:22,316 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:22,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:41:22,530 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash -896253586, now seen corresponding path program 16 times [2020-12-22 03:41:22,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:22,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745540634] [2020-12-22 03:41:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:22,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745540634] [2020-12-22 03:41:22,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462815565] [2020-12-22 03:41:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:22,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:41:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:22,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:22,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:41:22,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482526006] [2020-12-22 03:41:22,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:41:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:41:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:41:22,881 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2020-12-22 03:41:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:22,927 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 03:41:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:41:22,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-12-22 03:41:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:22,929 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:41:22,929 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 03:41:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:41:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 03:41:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 03:41:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:41:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 03:41:22,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-12-22 03:41:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:22,933 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 03:41:22,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:41:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 03:41:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 03:41:22,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:22,934 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:23,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:23,149 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash -93137778, now seen corresponding path program 17 times [2020-12-22 03:41:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:23,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362286886] [2020-12-22 03:41:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362286886] [2020-12-22 03:41:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069902351] [2020-12-22 03:41:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:23,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 03:41:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:41:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:23,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:23,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:41:23,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092787874] [2020-12-22 03:41:23,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:41:23,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:23,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:41:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:41:23,502 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-22 03:41:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:23,533 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 03:41:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:41:23,534 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-22 03:41:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:23,534 INFO L225 Difference]: With dead ends: 36 [2020-12-22 03:41:23,535 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 03:41:23,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:41:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 03:41:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 03:41:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 03:41:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-22 03:41:23,539 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-12-22 03:41:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:23,539 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-22 03:41:23,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:41:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-22 03:41:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:41:23,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:23,540 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:23,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:23,753 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -966351506, now seen corresponding path program 18 times [2020-12-22 03:41:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:23,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961612899] [2020-12-22 03:41:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961612899] [2020-12-22 03:41:24,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084011806] [2020-12-22 03:41:24,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:24,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 03:41:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:24,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:41:24,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:24,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:41:24,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230632082] [2020-12-22 03:41:24,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:41:24,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:41:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:41:24,158 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2020-12-22 03:41:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:24,197 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-22 03:41:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:41:24,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-12-22 03:41:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:24,198 INFO L225 Difference]: With dead ends: 37 [2020-12-22 03:41:24,198 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 03:41:24,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:41:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 03:41:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 03:41:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:41:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 03:41:24,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-12-22 03:41:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:24,204 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 03:41:24,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:41:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 03:41:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 03:41:24,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:24,205 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:24,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:24,419 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:24,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2028793998, now seen corresponding path program 19 times [2020-12-22 03:41:24,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:24,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262451923] [2020-12-22 03:41:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262451923] [2020-12-22 03:41:24,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736366583] [2020-12-22 03:41:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:41:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:24,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 03:41:24,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522373344] [2020-12-22 03:41:24,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:41:24,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:41:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:41:24,846 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-22 03:41:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:24,884 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 03:41:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:41:24,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-22 03:41:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:24,887 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:41:24,887 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 03:41:24,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:41:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 03:41:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 03:41:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 03:41:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-22 03:41:24,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-12-22 03:41:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:24,891 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-22 03:41:24,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:41:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-22 03:41:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:41:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:24,891 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:25,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 03:41:25,106 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash 389024110, now seen corresponding path program 20 times [2020-12-22 03:41:25,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:25,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231419788] [2020-12-22 03:41:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231419788] [2020-12-22 03:41:25,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932931945] [2020-12-22 03:41:25,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:25,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 03:41:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:25,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 03:41:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704374983] [2020-12-22 03:41:25,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:41:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:41:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:41:25,543 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2020-12-22 03:41:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:25,578 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 03:41:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 03:41:25,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-12-22 03:41:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:25,579 INFO L225 Difference]: With dead ends: 39 [2020-12-22 03:41:25,579 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 03:41:25,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:41:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 03:41:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 03:41:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 03:41:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 03:41:25,583 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-12-22 03:41:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:25,583 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 03:41:25,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:41:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 03:41:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 03:41:25,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:25,584 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:25,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 03:41:25,798 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1095765134, now seen corresponding path program 21 times [2020-12-22 03:41:25,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:25,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830673625] [2020-12-22 03:41:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830673625] [2020-12-22 03:41:26,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717933397] [2020-12-22 03:41:26,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:26,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 03:41:26,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:26,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 03:41:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:26,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 03:41:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757921196] [2020-12-22 03:41:26,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 03:41:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 03:41:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:41:26,282 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-22 03:41:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:26,319 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 03:41:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 03:41:26,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-12-22 03:41:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:26,320 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:41:26,320 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 03:41:26,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:41:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 03:41:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 03:41:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:41:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 03:41:26,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-12-22 03:41:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:26,324 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 03:41:26,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 03:41:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 03:41:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:41:26,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:26,325 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:26,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:26,541 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1529900398, now seen corresponding path program 22 times [2020-12-22 03:41:26,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:26,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566034511] [2020-12-22 03:41:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566034511] [2020-12-22 03:41:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117063894] [2020-12-22 03:41:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:26,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 03:41:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:27,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 03:41:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214414557] [2020-12-22 03:41:27,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 03:41:27,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 03:41:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:41:27,018 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2020-12-22 03:41:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:27,082 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-22 03:41:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 03:41:27,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-12-22 03:41:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:27,083 INFO L225 Difference]: With dead ends: 41 [2020-12-22 03:41:27,083 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 03:41:27,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:41:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 03:41:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 03:41:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 03:41:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-22 03:41:27,086 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-12-22 03:41:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:27,087 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-22 03:41:27,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 03:41:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-22 03:41:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 03:41:27,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:27,088 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:27,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 03:41:27,302 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2103191694, now seen corresponding path program 23 times [2020-12-22 03:41:27,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:27,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967024599] [2020-12-22 03:41:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967024599] [2020-12-22 03:41:27,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307843700] [2020-12-22 03:41:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:27,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 03:41:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:27,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:41:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:27,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 03:41:27,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213617345] [2020-12-22 03:41:27,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:41:27,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:41:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:41:27,913 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-22 03:41:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:27,957 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-22 03:41:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:41:27,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-12-22 03:41:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:27,958 INFO L225 Difference]: With dead ends: 42 [2020-12-22 03:41:27,959 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 03:41:27,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:41:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 03:41:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 03:41:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 03:41:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-22 03:41:27,962 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-12-22 03:41:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:27,963 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-22 03:41:27,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:41:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-22 03:41:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 03:41:27,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:27,963 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:28,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:28,179 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1599614610, now seen corresponding path program 24 times [2020-12-22 03:41:28,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:28,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700255017] [2020-12-22 03:41:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700255017] [2020-12-22 03:41:28,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149644758] [2020-12-22 03:41:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:28,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 03:41:28,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 03:41:28,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:28,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 03:41:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909390097] [2020-12-22 03:41:28,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 03:41:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 03:41:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:41:28,838 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2020-12-22 03:41:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:28,881 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 03:41:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:41:28,882 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-12-22 03:41:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:28,882 INFO L225 Difference]: With dead ends: 43 [2020-12-22 03:41:28,883 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 03:41:28,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:41:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 03:41:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 03:41:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:41:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 03:41:28,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-12-22 03:41:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:28,886 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 03:41:28,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 03:41:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 03:41:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 03:41:28,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:28,887 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:29,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 03:41:29,101 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:29,102 INFO L82 PathProgramCache]: Analyzing trace with hash -422493042, now seen corresponding path program 25 times [2020-12-22 03:41:29,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:29,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452458500] [2020-12-22 03:41:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452458500] [2020-12-22 03:41:29,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543883434] [2020-12-22 03:41:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:29,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 03:41:29,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:29,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 03:41:29,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131573437] [2020-12-22 03:41:29,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:41:29,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:29,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:41:29,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:41:29,681 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-22 03:41:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:29,721 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-22 03:41:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:41:29,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-12-22 03:41:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:29,722 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:41:29,722 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 03:41:29,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:41:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 03:41:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 03:41:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 03:41:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-22 03:41:29,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-12-22 03:41:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:29,726 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-22 03:41:29,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:41:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-22 03:41:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:41:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:29,727 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:29,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 03:41:29,942 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1708537198, now seen corresponding path program 26 times [2020-12-22 03:41:29,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:29,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796584113] [2020-12-22 03:41:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:30,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796584113] [2020-12-22 03:41:30,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419986921] [2020-12-22 03:41:30,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:30,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 03:41:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:30,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:30,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 03:41:30,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326782861] [2020-12-22 03:41:30,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 03:41:30,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:30,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 03:41:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:41:30,599 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2020-12-22 03:41:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:30,635 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 03:41:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 03:41:30,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-22 03:41:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:30,637 INFO L225 Difference]: With dead ends: 45 [2020-12-22 03:41:30,637 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 03:41:30,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:41:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 03:41:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 03:41:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 03:41:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 03:41:30,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-12-22 03:41:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:30,641 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 03:41:30,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 03:41:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 03:41:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 03:41:30,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:30,642 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:30,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 03:41:30,849 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -949002098, now seen corresponding path program 27 times [2020-12-22 03:41:30,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:30,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624716745] [2020-12-22 03:41:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:31,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624716745] [2020-12-22 03:41:31,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612709776] [2020-12-22 03:41:31,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:31,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 03:41:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:41:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:31,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:31,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 03:41:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958491452] [2020-12-22 03:41:31,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 03:41:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:31,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 03:41:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:41:31,543 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-22 03:41:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:31,617 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 03:41:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 03:41:31,617 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-12-22 03:41:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:31,618 INFO L225 Difference]: With dead ends: 46 [2020-12-22 03:41:31,618 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 03:41:31,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:41:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 03:41:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 03:41:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 03:41:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 03:41:31,622 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-12-22 03:41:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:31,622 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 03:41:31,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 03:41:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 03:41:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 03:41:31,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:31,623 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:31,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:31,838 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1728341650, now seen corresponding path program 28 times [2020-12-22 03:41:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:31,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086689761] [2020-12-22 03:41:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086689761] [2020-12-22 03:41:32,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837558141] [2020-12-22 03:41:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:32,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:32,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:41:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:32,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 03:41:32,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812716399] [2020-12-22 03:41:32,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 03:41:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 03:41:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:41:32,622 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2020-12-22 03:41:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:32,678 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 03:41:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 03:41:32,679 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-22 03:41:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:32,679 INFO L225 Difference]: With dead ends: 47 [2020-12-22 03:41:32,680 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 03:41:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:41:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 03:41:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 03:41:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:41:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-22 03:41:32,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-12-22 03:41:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:32,684 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-22 03:41:32,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 03:41:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-22 03:41:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 03:41:32,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:32,684 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:32,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 03:41:32,898 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -118063986, now seen corresponding path program 29 times [2020-12-22 03:41:32,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050761071] [2020-12-22 03:41:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:33,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050761071] [2020-12-22 03:41:33,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076072584] [2020-12-22 03:41:33,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:33,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 03:41:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:41:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:33,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:33,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 03:41:33,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452162555] [2020-12-22 03:41:33,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 03:41:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 03:41:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:41:33,770 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-22 03:41:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:33,828 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 03:41:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 03:41:33,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-12-22 03:41:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:33,828 INFO L225 Difference]: With dead ends: 48 [2020-12-22 03:41:33,829 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 03:41:33,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:41:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 03:41:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 03:41:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 03:41:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-22 03:41:33,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-12-22 03:41:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:33,833 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-22 03:41:33,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 03:41:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-22 03:41:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 03:41:33,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:33,834 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:34,043 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1739063954, now seen corresponding path program 30 times [2020-12-22 03:41:34,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327031258] [2020-12-22 03:41:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327031258] [2020-12-22 03:41:34,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822150713] [2020-12-22 03:41:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:34,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 03:41:34,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 03:41:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:34,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 03:41:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250106889] [2020-12-22 03:41:34,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 03:41:34,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 03:41:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:41:34,877 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2020-12-22 03:41:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:34,928 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 03:41:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 03:41:34,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-12-22 03:41:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:34,930 INFO L225 Difference]: With dead ends: 49 [2020-12-22 03:41:34,930 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 03:41:34,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:41:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 03:41:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 03:41:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:41:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 03:41:34,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-12-22 03:41:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:34,937 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 03:41:34,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 03:41:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 03:41:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 03:41:34,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,938 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:35,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 03:41:35,152 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash -450455410, now seen corresponding path program 31 times [2020-12-22 03:41:35,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:35,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134331856] [2020-12-22 03:41:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:35,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134331856] [2020-12-22 03:41:35,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039720999] [2020-12-22 03:41:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:41:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:36,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:36,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 03:41:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863044623] [2020-12-22 03:41:36,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 03:41:36,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 03:41:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:41:36,059 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-22 03:41:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:36,102 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-22 03:41:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 03:41:36,102 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-22 03:41:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:36,103 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:41:36,103 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 03:41:36,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:41:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 03:41:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 03:41:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 03:41:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-22 03:41:36,105 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-12-22 03:41:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:36,106 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-22 03:41:36,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 03:41:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-22 03:41:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 03:41:36,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:36,106 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:36,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 03:41:36,321 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash 841703790, now seen corresponding path program 32 times [2020-12-22 03:41:36,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:36,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164551082] [2020-12-22 03:41:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164551082] [2020-12-22 03:41:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9580613] [2020-12-22 03:41:37,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:37,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:41:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:37,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:37,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 03:41:37,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740350410] [2020-12-22 03:41:37,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 03:41:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:37,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 03:41:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:41:37,170 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2020-12-22 03:41:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:37,221 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-22 03:41:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 03:41:37,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-12-22 03:41:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:37,222 INFO L225 Difference]: With dead ends: 51 [2020-12-22 03:41:37,222 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 03:41:37,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:41:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 03:41:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 03:41:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 03:41:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 03:41:37,225 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-12-22 03:41:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:37,225 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 03:41:37,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 03:41:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 03:41:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 03:41:37,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:37,226 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:37,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 03:41:37,440 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2051033970, now seen corresponding path program 33 times [2020-12-22 03:41:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:37,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21430241] [2020-12-22 03:41:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:38,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21430241] [2020-12-22 03:41:38,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313219458] [2020-12-22 03:41:38,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 03:41:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 03:41:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:38,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:38,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 03:41:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364591171] [2020-12-22 03:41:38,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 03:41:38,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 03:41:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:41:38,378 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-22 03:41:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:38,433 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 03:41:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:41:38,433 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-12-22 03:41:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:38,434 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:41:38,434 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 03:41:38,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:41:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 03:41:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 03:41:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 03:41:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 03:41:38,437 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-12-22 03:41:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:38,437 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 03:41:38,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 03:41:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 03:41:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 03:41:38,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:38,438 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:38,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 03:41:38,651 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:38,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1531591314, now seen corresponding path program 34 times [2020-12-22 03:41:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:38,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116064924] [2020-12-22 03:41:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:39,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116064924] [2020-12-22 03:41:39,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355934827] [2020-12-22 03:41:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:39,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:39,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:39,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 03:41:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:39,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:39,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 03:41:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860461167] [2020-12-22 03:41:39,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 03:41:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:39,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 03:41:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:41:39,697 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2020-12-22 03:41:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:39,757 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 03:41:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 03:41:39,758 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-12-22 03:41:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:39,758 INFO L225 Difference]: With dead ends: 53 [2020-12-22 03:41:39,758 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 03:41:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:41:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 03:41:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 03:41:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 03:41:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-22 03:41:39,762 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-12-22 03:41:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:39,762 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-22 03:41:39,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 03:41:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-22 03:41:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 03:41:39,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:39,763 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:39,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 03:41:39,978 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1686229134, now seen corresponding path program 35 times [2020-12-22 03:41:39,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:39,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049106323] [2020-12-22 03:41:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:40,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049106323] [2020-12-22 03:41:40,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310413355] [2020-12-22 03:41:40,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:41,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 03:41:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 03:41:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:41,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:41,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 03:41:41,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989968243] [2020-12-22 03:41:41,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 03:41:41,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 03:41:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:41:41,097 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-22 03:41:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:41,143 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-22 03:41:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 03:41:41,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-12-22 03:41:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:41,144 INFO L225 Difference]: With dead ends: 54 [2020-12-22 03:41:41,144 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 03:41:41,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:41:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 03:41:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 03:41:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 03:41:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-22 03:41:41,147 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-12-22 03:41:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:41,147 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-22 03:41:41,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 03:41:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-22 03:41:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 03:41:41,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:41,148 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:41,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 03:41:41,364 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:41,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1640552082, now seen corresponding path program 36 times [2020-12-22 03:41:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:41,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121240059] [2020-12-22 03:41:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:42,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121240059] [2020-12-22 03:41:42,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494771955] [2020-12-22 03:41:42,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:42,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 03:41:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:41:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:42,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:42,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 03:41:42,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090195659] [2020-12-22 03:41:42,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 03:41:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 03:41:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:41:42,480 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2020-12-22 03:41:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:42,557 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-22 03:41:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 03:41:42,557 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-12-22 03:41:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:42,558 INFO L225 Difference]: With dead ends: 55 [2020-12-22 03:41:42,558 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 03:41:42,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:41:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 03:41:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 03:41:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 03:41:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 03:41:42,562 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-12-22 03:41:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:42,563 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 03:41:42,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 03:41:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 03:41:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 03:41:42,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:42,563 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:42,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 03:41:42,778 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1691554674, now seen corresponding path program 37 times [2020-12-22 03:41:42,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:42,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861239261] [2020-12-22 03:41:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:43,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861239261] [2020-12-22 03:41:43,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188720227] [2020-12-22 03:41:43,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:41:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:43,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:43,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 03:41:43,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239357103] [2020-12-22 03:41:43,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 03:41:43,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 03:41:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:41:43,999 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-22 03:41:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:44,048 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 03:41:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:41:44,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-12-22 03:41:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:44,049 INFO L225 Difference]: With dead ends: 56 [2020-12-22 03:41:44,049 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 03:41:44,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:41:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 03:41:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 03:41:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 03:41:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-22 03:41:44,052 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-12-22 03:41:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:44,053 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-22 03:41:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 03:41:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-22 03:41:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 03:41:44,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:44,054 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:44,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 03:41:44,264 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1022332270, now seen corresponding path program 38 times [2020-12-22 03:41:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:44,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069477482] [2020-12-22 03:41:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:45,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069477482] [2020-12-22 03:41:45,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152328361] [2020-12-22 03:41:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:45,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 03:41:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:45,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:45,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 03:41:45,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385562615] [2020-12-22 03:41:45,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 03:41:45,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:45,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 03:41:45,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:41:45,459 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2020-12-22 03:41:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:45,510 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 03:41:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 03:41:45,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-12-22 03:41:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:45,511 INFO L225 Difference]: With dead ends: 57 [2020-12-22 03:41:45,511 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 03:41:45,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:41:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 03:41:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 03:41:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 03:41:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-22 03:41:45,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-12-22 03:41:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:45,516 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-22 03:41:45,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 03:41:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-22 03:41:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 03:41:45,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:45,516 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:45,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:45,730 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash -746518386, now seen corresponding path program 39 times [2020-12-22 03:41:45,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:45,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581215953] [2020-12-22 03:41:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581215953] [2020-12-22 03:41:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239443338] [2020-12-22 03:41:46,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:46,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 03:41:46,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 03:41:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:46,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:46,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 03:41:46,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945699207] [2020-12-22 03:41:46,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 03:41:46,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:46,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 03:41:46,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:41:46,987 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-22 03:41:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:47,067 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-22 03:41:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 03:41:47,068 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-12-22 03:41:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:47,068 INFO L225 Difference]: With dead ends: 58 [2020-12-22 03:41:47,069 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 03:41:47,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:41:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 03:41:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 03:41:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 03:41:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 03:41:47,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-12-22 03:41:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:47,073 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 03:41:47,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 03:41:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 03:41:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 03:41:47,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:47,074 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:47,288 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 253686126, now seen corresponding path program 40 times [2020-12-22 03:41:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814147362] [2020-12-22 03:41:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:48,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814147362] [2020-12-22 03:41:48,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339480628] [2020-12-22 03:41:48,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:48,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:48,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 03:41:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:48,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:48,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 03:41:48,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428288637] [2020-12-22 03:41:48,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 03:41:48,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 03:41:48,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:41:48,675 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2020-12-22 03:41:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:48,750 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-22 03:41:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 03:41:48,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2020-12-22 03:41:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:48,751 INFO L225 Difference]: With dead ends: 59 [2020-12-22 03:41:48,751 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 03:41:48,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:41:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 03:41:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 03:41:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 03:41:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 03:41:48,755 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-12-22 03:41:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:48,755 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 03:41:48,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 03:41:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 03:41:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 03:41:48,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:48,756 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:48,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 03:41:48,969 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1195254926, now seen corresponding path program 41 times [2020-12-22 03:41:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:48,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398046056] [2020-12-22 03:41:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:50,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398046056] [2020-12-22 03:41:50,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724836728] [2020-12-22 03:41:50,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:50,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 03:41:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:50,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 03:41:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:50,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:50,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 03:41:50,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115049315] [2020-12-22 03:41:50,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 03:41:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:50,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 03:41:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:41:50,320 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-22 03:41:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:50,376 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-22 03:41:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 03:41:50,376 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2020-12-22 03:41:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:50,377 INFO L225 Difference]: With dead ends: 60 [2020-12-22 03:41:50,377 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 03:41:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:41:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 03:41:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 03:41:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 03:41:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-22 03:41:50,380 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-12-22 03:41:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:50,380 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-22 03:41:50,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 03:41:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-22 03:41:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 03:41:50,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:50,381 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:50,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:50,597 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 319116654, now seen corresponding path program 42 times [2020-12-22 03:41:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:50,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973283006] [2020-12-22 03:41:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:51,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973283006] [2020-12-22 03:41:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844402248] [2020-12-22 03:41:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:51,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 03:41:51,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 03:41:51,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 03:41:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809700707] [2020-12-22 03:41:51,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 03:41:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 03:41:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:41:51,968 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2020-12-22 03:41:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:52,030 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-22 03:41:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 03:41:52,030 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2020-12-22 03:41:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:52,031 INFO L225 Difference]: With dead ends: 61 [2020-12-22 03:41:52,031 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 03:41:52,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:41:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 03:41:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 03:41:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 03:41:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 03:41:52,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-12-22 03:41:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:52,034 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 03:41:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 03:41:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 03:41:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 03:41:52,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:52,035 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:52,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:52,249 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:52,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1071366002, now seen corresponding path program 43 times [2020-12-22 03:41:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:52,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865486790] [2020-12-22 03:41:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:53,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865486790] [2020-12-22 03:41:53,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982758333] [2020-12-22 03:41:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:53,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 03:41:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:53,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:53,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 03:41:53,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121182243] [2020-12-22 03:41:53,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 03:41:53,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 03:41:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:41:53,763 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-22 03:41:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:53,847 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-22 03:41:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 03:41:53,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-12-22 03:41:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:53,848 INFO L225 Difference]: With dead ends: 62 [2020-12-22 03:41:53,848 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 03:41:53,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:41:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 03:41:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 03:41:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 03:41:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-22 03:41:53,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-12-22 03:41:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:53,852 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-22 03:41:53,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 03:41:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-22 03:41:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 03:41:53,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:53,852 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:54,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 03:41:54,067 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1226655378, now seen corresponding path program 44 times [2020-12-22 03:41:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183759555] [2020-12-22 03:41:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:55,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183759555] [2020-12-22 03:41:55,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774766122] [2020-12-22 03:41:55,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 03:41:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:55,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:55,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 03:41:55,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503457652] [2020-12-22 03:41:55,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 03:41:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 03:41:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:41:55,660 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 49 states. [2020-12-22 03:41:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:55,723 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-22 03:41:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 03:41:55,724 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2020-12-22 03:41:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:55,725 INFO L225 Difference]: With dead ends: 63 [2020-12-22 03:41:55,725 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 03:41:55,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:41:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 03:41:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 03:41:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 03:41:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-22 03:41:55,728 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-12-22 03:41:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:55,729 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-22 03:41:55,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 03:41:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-22 03:41:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 03:41:55,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:55,729 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 03:41:55,943 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1745658738, now seen corresponding path program 45 times [2020-12-22 03:41:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:55,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257532879] [2020-12-22 03:41:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:57,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257532879] [2020-12-22 03:41:57,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536878876] [2020-12-22 03:41:57,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:57,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 03:41:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 03:41:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:57,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:57,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 03:41:57,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409569228] [2020-12-22 03:41:57,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 03:41:57,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 03:41:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:41:57,549 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2020-12-22 03:41:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:57,641 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-22 03:41:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 03:41:57,645 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2020-12-22 03:41:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:57,646 INFO L225 Difference]: With dead ends: 64 [2020-12-22 03:41:57,646 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 03:41:57,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:41:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 03:41:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 03:41:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 03:41:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-22 03:41:57,649 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-12-22 03:41:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:57,650 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-22 03:41:57,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 03:41:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-22 03:41:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 03:41:57,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:57,651 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:57,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 03:41:57,865 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -654893714, now seen corresponding path program 46 times [2020-12-22 03:41:57,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:57,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166854819] [2020-12-22 03:41:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:59,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166854819] [2020-12-22 03:41:59,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096472385] [2020-12-22 03:41:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:59,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:59,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:59,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:41:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:59,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:59,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 03:41:59,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425031481] [2020-12-22 03:41:59,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 03:41:59,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:59,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 03:41:59,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:41:59,586 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 51 states. [2020-12-22 03:41:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:59,692 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-12-22 03:41:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 03:41:59,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 55 [2020-12-22 03:41:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:59,694 INFO L225 Difference]: With dead ends: 65 [2020-12-22 03:41:59,694 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 03:41:59,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:41:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 03:41:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 03:41:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 03:41:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-22 03:41:59,697 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-12-22 03:41:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:59,697 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-22 03:41:59,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 03:41:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-22 03:41:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 03:41:59,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:59,698 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:59,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:59,913 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1200916338, now seen corresponding path program 47 times [2020-12-22 03:41:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:59,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640558813] [2020-12-22 03:41:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:01,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640558813] [2020-12-22 03:42:01,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54332035] [2020-12-22 03:42:01,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:01,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 03:42:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 03:42:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 03:42:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815431511] [2020-12-22 03:42:01,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 03:42:01,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 03:42:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:42:01,762 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 52 states. [2020-12-22 03:42:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:01,854 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-22 03:42:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 03:42:01,854 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 56 [2020-12-22 03:42:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:01,855 INFO L225 Difference]: With dead ends: 66 [2020-12-22 03:42:01,855 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 03:42:01,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:42:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 03:42:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 03:42:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 03:42:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-22 03:42:01,859 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-12-22 03:42:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:01,859 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-22 03:42:01,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 03:42:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-22 03:42:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 03:42:01,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:01,860 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:02,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 03:42:02,074 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -947748498, now seen corresponding path program 48 times [2020-12-22 03:42:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:02,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975836830] [2020-12-22 03:42:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:03,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975836830] [2020-12-22 03:42:03,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959070534] [2020-12-22 03:42:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:03,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-22 03:42:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:03,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 03:42:03,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:03,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:03,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 03:42:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008673768] [2020-12-22 03:42:03,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 03:42:03,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 03:42:03,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:42:03,858 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 53 states. [2020-12-22 03:42:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:03,959 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-22 03:42:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 03:42:03,959 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 57 [2020-12-22 03:42:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:03,960 INFO L225 Difference]: With dead ends: 67 [2020-12-22 03:42:03,960 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 03:42:03,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:42:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 03:42:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 03:42:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 03:42:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-22 03:42:03,963 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-12-22 03:42:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:03,964 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-22 03:42:03,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 03:42:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-22 03:42:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 03:42:03,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:03,965 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:04,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:04,179 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1689480050, now seen corresponding path program 49 times [2020-12-22 03:42:04,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:04,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322706557] [2020-12-22 03:42:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322706557] [2020-12-22 03:42:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095020042] [2020-12-22 03:42:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 03:42:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:06,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:06,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 03:42:06,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590795813] [2020-12-22 03:42:06,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 03:42:06,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 03:42:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:42:06,114 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 54 states. [2020-12-22 03:42:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:06,207 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-22 03:42:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 03:42:06,208 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 58 [2020-12-22 03:42:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:06,209 INFO L225 Difference]: With dead ends: 68 [2020-12-22 03:42:06,209 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 03:42:06,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:42:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 03:42:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-22 03:42:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 03:42:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-12-22 03:42:06,212 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-12-22 03:42:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:06,213 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-12-22 03:42:06,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 03:42:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-12-22 03:42:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 03:42:06,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:06,214 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:06,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:06,429 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1086645614, now seen corresponding path program 50 times [2020-12-22 03:42:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:06,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099091480] [2020-12-22 03:42:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099091480] [2020-12-22 03:42:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294580841] [2020-12-22 03:42:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:08,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:42:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:08,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 03:42:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144931007] [2020-12-22 03:42:08,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 03:42:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 03:42:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:42:08,449 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 55 states. [2020-12-22 03:42:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:08,555 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-12-22 03:42:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 03:42:08,556 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 59 [2020-12-22 03:42:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:08,556 INFO L225 Difference]: With dead ends: 69 [2020-12-22 03:42:08,557 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 03:42:08,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:42:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 03:42:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 03:42:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 03:42:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-22 03:42:08,560 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-12-22 03:42:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:08,560 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-22 03:42:08,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 03:42:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-22 03:42:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 03:42:08,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:08,561 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:08,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 03:42:08,775 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1247195278, now seen corresponding path program 51 times [2020-12-22 03:42:08,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:08,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747061974] [2020-12-22 03:42:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747061974] [2020-12-22 03:42:10,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589741] [2020-12-22 03:42:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:10,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-22 03:42:10,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 03:42:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:10,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 03:42:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398830779] [2020-12-22 03:42:10,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 03:42:10,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 03:42:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:42:10,874 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 56 states. [2020-12-22 03:42:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:10,983 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-22 03:42:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 03:42:10,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 60 [2020-12-22 03:42:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:10,984 INFO L225 Difference]: With dead ends: 70 [2020-12-22 03:42:10,984 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 03:42:10,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:42:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 03:42:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 03:42:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 03:42:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-22 03:42:10,988 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-12-22 03:42:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-22 03:42:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 03:42:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-22 03:42:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 03:42:10,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:10,989 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:11,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:11,205 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1929267566, now seen corresponding path program 52 times [2020-12-22 03:42:11,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:11,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912982784] [2020-12-22 03:42:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:13,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912982784] [2020-12-22 03:42:13,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134495376] [2020-12-22 03:42:13,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:13,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:13,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:13,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 03:42:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:13,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:13,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 03:42:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801163461] [2020-12-22 03:42:13,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 03:42:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 03:42:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:42:13,239 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 57 states. [2020-12-22 03:42:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:13,347 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-12-22 03:42:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 03:42:13,347 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 61 [2020-12-22 03:42:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:13,348 INFO L225 Difference]: With dead ends: 71 [2020-12-22 03:42:13,348 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 03:42:13,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:42:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 03:42:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 03:42:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 03:42:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-22 03:42:13,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-12-22 03:42:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:13,356 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-22 03:42:13,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 03:42:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-22 03:42:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 03:42:13,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:13,358 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:13,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 03:42:13,574 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1598672014, now seen corresponding path program 53 times [2020-12-22 03:42:13,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:13,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659800689] [2020-12-22 03:42:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:15,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659800689] [2020-12-22 03:42:15,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802077225] [2020-12-22 03:42:15,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:15,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-22 03:42:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 03:42:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:15,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:15,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 03:42:15,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107073432] [2020-12-22 03:42:15,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 03:42:15,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:15,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 03:42:15,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:42:15,803 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 58 states. [2020-12-22 03:42:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:15,902 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-22 03:42:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 03:42:15,903 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 62 [2020-12-22 03:42:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:15,904 INFO L225 Difference]: With dead ends: 72 [2020-12-22 03:42:15,904 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 03:42:15,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:42:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 03:42:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-22 03:42:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 03:42:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-22 03:42:15,908 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-12-22 03:42:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:15,908 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-22 03:42:15,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 03:42:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-22 03:42:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 03:42:15,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:15,909 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:16,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 03:42:16,111 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -59855506, now seen corresponding path program 54 times [2020-12-22 03:42:16,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:16,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336570160] [2020-12-22 03:42:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:18,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336570160] [2020-12-22 03:42:18,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983965370] [2020-12-22 03:42:18,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:18,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-22 03:42:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 03:42:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:18,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 03:42:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157036582] [2020-12-22 03:42:18,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 03:42:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 03:42:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:42:18,524 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 59 states. [2020-12-22 03:42:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:18,614 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-22 03:42:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 03:42:18,619 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 63 [2020-12-22 03:42:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:18,620 INFO L225 Difference]: With dead ends: 73 [2020-12-22 03:42:18,620 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 03:42:18,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:42:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 03:42:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 03:42:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 03:42:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-22 03:42:18,623 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-12-22 03:42:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:18,624 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-22 03:42:18,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 03:42:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-22 03:42:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 03:42:18,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:18,624 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:18,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:18,837 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash 65398926, now seen corresponding path program 55 times [2020-12-22 03:42:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881573012] [2020-12-22 03:42:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881573012] [2020-12-22 03:42:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204302365] [2020-12-22 03:42:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 03:42:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:21,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 03:42:21,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341980867] [2020-12-22 03:42:21,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 03:42:21,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 03:42:21,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:42:21,220 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 60 states. [2020-12-22 03:42:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:21,312 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-22 03:42:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 03:42:21,312 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 64 [2020-12-22 03:42:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:21,313 INFO L225 Difference]: With dead ends: 74 [2020-12-22 03:42:21,313 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 03:42:21,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:42:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 03:42:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 03:42:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 03:42:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-22 03:42:21,319 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-12-22 03:42:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:21,319 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-22 03:42:21,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 03:42:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-22 03:42:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 03:42:21,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:21,320 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:21,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 03:42:21,521 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash -346680978, now seen corresponding path program 56 times [2020-12-22 03:42:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:21,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457642837] [2020-12-22 03:42:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:23,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457642837] [2020-12-22 03:42:23,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351714002] [2020-12-22 03:42:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:23,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:23,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 03:42:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:24,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:24,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 03:42:24,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890053922] [2020-12-22 03:42:24,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 03:42:24,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:24,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 03:42:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:42:24,061 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 61 states. [2020-12-22 03:42:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:24,159 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-22 03:42:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 03:42:24,159 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 65 [2020-12-22 03:42:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:24,160 INFO L225 Difference]: With dead ends: 75 [2020-12-22 03:42:24,160 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 03:42:24,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:42:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 03:42:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-22 03:42:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 03:42:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-22 03:42:24,164 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-12-22 03:42:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:24,164 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-22 03:42:24,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 03:42:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-22 03:42:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 03:42:24,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,165 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:24,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:24,379 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -236256114, now seen corresponding path program 57 times [2020-12-22 03:42:24,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:24,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685418716] [2020-12-22 03:42:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:26,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685418716] [2020-12-22 03:42:26,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463219285] [2020-12-22 03:42:26,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-22 03:42:26,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 03:42:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:26,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:26,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 03:42:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929939889] [2020-12-22 03:42:26,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 03:42:26,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 03:42:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:42:27,000 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 62 states. [2020-12-22 03:42:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:27,099 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-22 03:42:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 03:42:27,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 66 [2020-12-22 03:42:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:27,100 INFO L225 Difference]: With dead ends: 76 [2020-12-22 03:42:27,101 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 03:42:27,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:42:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 03:42:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-22 03:42:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 03:42:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 03:42:27,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-12-22 03:42:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:27,105 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 03:42:27,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 03:42:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 03:42:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 03:42:27,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:27,106 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:27,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 03:42:27,320 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1108052626, now seen corresponding path program 58 times [2020-12-22 03:42:27,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:27,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627701790] [2020-12-22 03:42:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:29,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627701790] [2020-12-22 03:42:29,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136325868] [2020-12-22 03:42:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:29,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 03:42:29,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:30,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:30,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 03:42:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23887666] [2020-12-22 03:42:30,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 03:42:30,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:30,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 03:42:30,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:42:30,060 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 63 states. [2020-12-22 03:42:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:30,173 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-12-22 03:42:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 03:42:30,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 67 [2020-12-22 03:42:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:30,175 INFO L225 Difference]: With dead ends: 77 [2020-12-22 03:42:30,175 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 03:42:30,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:42:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 03:42:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-22 03:42:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 03:42:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-22 03:42:30,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-12-22 03:42:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:30,179 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-22 03:42:30,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 03:42:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-22 03:42:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 03:42:30,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:30,180 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:30,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:30,395 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1931026574, now seen corresponding path program 59 times [2020-12-22 03:42:30,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:30,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084548699] [2020-12-22 03:42:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084548699] [2020-12-22 03:42:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893826473] [2020-12-22 03:42:32,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:33,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 03:42:33,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 03:42:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 03:42:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066852155] [2020-12-22 03:42:33,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 03:42:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 03:42:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:42:33,235 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 64 states. [2020-12-22 03:42:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:33,383 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-12-22 03:42:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 03:42:33,384 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 68 [2020-12-22 03:42:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:33,385 INFO L225 Difference]: With dead ends: 78 [2020-12-22 03:42:33,385 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 03:42:33,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:42:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 03:42:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-22 03:42:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 03:42:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-12-22 03:42:33,389 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-12-22 03:42:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:33,389 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-12-22 03:42:33,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 03:42:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-12-22 03:42:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 03:42:33,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:33,390 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:33,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 03:42:33,605 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201262, now seen corresponding path program 60 times [2020-12-22 03:42:33,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:33,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11569201] [2020-12-22 03:42:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11569201] [2020-12-22 03:42:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502050035] [2020-12-22 03:42:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:36,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-22 03:42:36,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 03:42:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:36,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 03:42:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384805610] [2020-12-22 03:42:36,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 03:42:36,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 03:42:36,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:42:36,507 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 65 states. [2020-12-22 03:42:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:36,626 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-12-22 03:42:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 03:42:36,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 69 [2020-12-22 03:42:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:36,628 INFO L225 Difference]: With dead ends: 79 [2020-12-22 03:42:36,628 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 03:42:36,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:42:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 03:42:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 03:42:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 03:42:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-22 03:42:36,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-12-22 03:42:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:36,632 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-22 03:42:36,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 03:42:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-22 03:42:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 03:42:36,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:36,632 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:36,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:36,846 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:36,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1630551182, now seen corresponding path program 61 times [2020-12-22 03:42:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:36,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249418643] [2020-12-22 03:42:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249418643] [2020-12-22 03:42:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371955503] [2020-12-22 03:42:39,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 03:42:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:39,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 03:42:39,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349562213] [2020-12-22 03:42:39,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 03:42:39,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:39,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 03:42:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:42:39,651 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 66 states. [2020-12-22 03:42:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:39,755 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-12-22 03:42:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 03:42:39,757 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 70 [2020-12-22 03:42:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:39,760 INFO L225 Difference]: With dead ends: 80 [2020-12-22 03:42:39,760 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 03:42:39,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:42:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 03:42:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 03:42:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 03:42:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-22 03:42:39,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-12-22 03:42:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:39,766 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-22 03:42:39,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 03:42:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-22 03:42:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 03:42:39,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:39,767 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:39,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 03:42:39,981 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 928398702, now seen corresponding path program 62 times [2020-12-22 03:42:39,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:39,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564373490] [2020-12-22 03:42:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564373490] [2020-12-22 03:42:42,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892856279] [2020-12-22 03:42:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 03:42:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:42,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 03:42:42,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834051922] [2020-12-22 03:42:42,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 03:42:42,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 03:42:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:42:42,947 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 67 states. [2020-12-22 03:42:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:43,093 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-22 03:42:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 03:42:43,094 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 71 [2020-12-22 03:42:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:43,095 INFO L225 Difference]: With dead ends: 81 [2020-12-22 03:42:43,095 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 03:42:43,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:42:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 03:42:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 03:42:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 03:42:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-22 03:42:43,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-12-22 03:42:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:43,099 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-22 03:42:43,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 03:42:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-22 03:42:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 03:42:43,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:43,100 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:43,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:43,313 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 636508302, now seen corresponding path program 63 times [2020-12-22 03:42:43,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:43,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481951493] [2020-12-22 03:42:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481951493] [2020-12-22 03:42:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317066954] [2020-12-22 03:42:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:46,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-12-22 03:42:46,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 03:42:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:46,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 03:42:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770164728] [2020-12-22 03:42:46,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 03:42:46,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 03:42:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:42:46,418 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 68 states. [2020-12-22 03:42:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:46,567 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-12-22 03:42:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 03:42:46,567 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 72 [2020-12-22 03:42:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:46,568 INFO L225 Difference]: With dead ends: 82 [2020-12-22 03:42:46,568 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 03:42:46,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:42:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 03:42:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 03:42:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 03:42:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-22 03:42:46,572 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-12-22 03:42:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:46,573 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-22 03:42:46,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 03:42:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-22 03:42:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 03:42:46,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:46,574 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:46,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 03:42:46,788 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 177840494, now seen corresponding path program 64 times [2020-12-22 03:42:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:46,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668343980] [2020-12-22 03:42:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:49,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668343980] [2020-12-22 03:42:49,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36868648] [2020-12-22 03:42:49,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:50,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:50,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 03:42:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:50,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 03:42:50,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119997199] [2020-12-22 03:42:50,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 03:42:50,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 03:42:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:42:50,126 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 69 states. [2020-12-22 03:42:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:50,264 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-12-22 03:42:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 03:42:50,265 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 73 [2020-12-22 03:42:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:50,265 INFO L225 Difference]: With dead ends: 83 [2020-12-22 03:42:50,265 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 03:42:50,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:42:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 03:42:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 03:42:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 03:42:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-22 03:42:50,270 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-12-22 03:42:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:50,270 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-22 03:42:50,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 03:42:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-22 03:42:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 03:42:50,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:50,271 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:50,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 03:42:50,485 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1155959666, now seen corresponding path program 65 times [2020-12-22 03:42:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:50,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123542295] [2020-12-22 03:42:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123542295] [2020-12-22 03:42:53,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839438564] [2020-12-22 03:42:53,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:53,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-22 03:42:53,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 03:42:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:53,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 03:42:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246828289] [2020-12-22 03:42:53,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 03:42:53,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 03:42:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:42:53,885 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 70 states. [2020-12-22 03:42:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:54,040 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-12-22 03:42:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 03:42:54,041 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 74 [2020-12-22 03:42:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:54,042 INFO L225 Difference]: With dead ends: 84 [2020-12-22 03:42:54,042 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 03:42:54,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:42:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 03:42:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-22 03:42:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 03:42:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-12-22 03:42:54,045 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-12-22 03:42:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-12-22 03:42:54,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 03:42:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-12-22 03:42:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 03:42:54,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:54,046 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:54,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 03:42:54,255 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 445908334, now seen corresponding path program 66 times [2020-12-22 03:42:54,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:54,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180860731] [2020-12-22 03:42:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180860731] [2020-12-22 03:42:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911899691] [2020-12-22 03:42:57,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:57,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-22 03:42:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 03:42:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:57,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 03:42:57,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986871001] [2020-12-22 03:42:57,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 03:42:57,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 03:42:57,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:42:57,795 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 71 states. [2020-12-22 03:42:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:57,953 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-22 03:42:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 03:42:57,954 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 75 [2020-12-22 03:42:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:57,955 INFO L225 Difference]: With dead ends: 85 [2020-12-22 03:42:57,955 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 03:42:57,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:42:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 03:42:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 03:42:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 03:42:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-22 03:42:57,958 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-12-22 03:42:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:57,958 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-22 03:42:57,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 03:42:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-22 03:42:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 03:42:57,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:57,959 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:58,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:58,174 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1435791218, now seen corresponding path program 67 times [2020-12-22 03:42:58,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:58,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428437539] [2020-12-22 03:42:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428437539] [2020-12-22 03:43:01,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707321183] [2020-12-22 03:43:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 03:43:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:01,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 03:43:01,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19163954] [2020-12-22 03:43:01,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 03:43:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 03:43:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:43:01,761 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 72 states. [2020-12-22 03:43:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:01,876 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-12-22 03:43:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 03:43:01,877 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 76 [2020-12-22 03:43:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:01,878 INFO L225 Difference]: With dead ends: 86 [2020-12-22 03:43:01,878 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 03:43:01,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:43:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 03:43:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-22 03:43:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 03:43:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-22 03:43:01,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-12-22 03:43:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:01,882 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-22 03:43:01,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 03:43:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-22 03:43:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 03:43:01,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:01,883 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:02,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 03:43:02,098 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash 361064814, now seen corresponding path program 68 times [2020-12-22 03:43:02,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:02,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160098822] [2020-12-22 03:43:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160098822] [2020-12-22 03:43:05,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505054141] [2020-12-22 03:43:05,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:05,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:05,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 03:43:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:05,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 03:43:05,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737543269] [2020-12-22 03:43:05,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 03:43:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:05,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 03:43:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:43:05,819 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 73 states. [2020-12-22 03:43:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:05,941 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-12-22 03:43:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 03:43:05,941 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 77 [2020-12-22 03:43:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:05,942 INFO L225 Difference]: With dead ends: 87 [2020-12-22 03:43:05,942 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 03:43:05,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:43:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 03:43:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 03:43:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 03:43:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-22 03:43:05,946 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2020-12-22 03:43:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:05,946 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-22 03:43:05,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 03:43:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-22 03:43:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 03:43:05,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:05,947 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:06,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:06,158 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash 229026958, now seen corresponding path program 69 times [2020-12-22 03:43:06,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:06,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207217386] [2020-12-22 03:43:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207217386] [2020-12-22 03:43:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327312404] [2020-12-22 03:43:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:09,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-22 03:43:09,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:09,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 03:43:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:10,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:10,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 03:43:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974657521] [2020-12-22 03:43:10,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 03:43:10,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:10,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 03:43:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:43:10,021 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 74 states. [2020-12-22 03:43:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:10,198 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-22 03:43:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 03:43:10,198 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 78 [2020-12-22 03:43:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:10,199 INFO L225 Difference]: With dead ends: 88 [2020-12-22 03:43:10,199 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 03:43:10,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:43:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 03:43:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-22 03:43:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 03:43:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-22 03:43:10,203 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-12-22 03:43:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:10,203 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-22 03:43:10,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 03:43:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-22 03:43:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 03:43:10,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:10,204 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:10,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 03:43:10,408 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 430820718, now seen corresponding path program 70 times [2020-12-22 03:43:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:10,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960694594] [2020-12-22 03:43:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960694594] [2020-12-22 03:43:14,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934681014] [2020-12-22 03:43:14,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:14,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:14,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 03:43:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:14,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:14,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 03:43:14,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367948049] [2020-12-22 03:43:14,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 03:43:14,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 03:43:14,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:43:14,344 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 75 states. [2020-12-22 03:43:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:14,523 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-12-22 03:43:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 03:43:14,524 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 79 [2020-12-22 03:43:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:14,525 INFO L225 Difference]: With dead ends: 89 [2020-12-22 03:43:14,525 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 03:43:14,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:43:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 03:43:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 03:43:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 03:43:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-22 03:43:14,529 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-12-22 03:43:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:14,529 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-22 03:43:14,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 03:43:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-22 03:43:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 03:43:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:14,530 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:14,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:14,745 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1903507314, now seen corresponding path program 71 times [2020-12-22 03:43:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:14,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361001221] [2020-12-22 03:43:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:18,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361001221] [2020-12-22 03:43:18,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296995934] [2020-12-22 03:43:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:18,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 03:43:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 03:43:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:18,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:18,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 03:43:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842501128] [2020-12-22 03:43:18,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 03:43:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 03:43:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:43:18,703 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 76 states. [2020-12-22 03:43:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:18,878 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-22 03:43:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 03:43:18,878 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 80 [2020-12-22 03:43:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:18,880 INFO L225 Difference]: With dead ends: 90 [2020-12-22 03:43:18,880 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 03:43:18,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:43:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 03:43:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-22 03:43:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 03:43:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-12-22 03:43:18,883 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-12-22 03:43:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:18,884 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-12-22 03:43:18,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 03:43:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-12-22 03:43:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 03:43:18,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:18,885 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:19,098 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1253232274, now seen corresponding path program 72 times [2020-12-22 03:43:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:19,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010798819] [2020-12-22 03:43:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:22,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010798819] [2020-12-22 03:43:22,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942424511] [2020-12-22 03:43:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:23,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-22 03:43:23,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 03:43:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:23,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:23,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 03:43:23,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362790066] [2020-12-22 03:43:23,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 03:43:23,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 03:43:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:43:23,292 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 77 states. [2020-12-22 03:43:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:23,481 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-12-22 03:43:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 03:43:23,481 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 81 [2020-12-22 03:43:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:23,482 INFO L225 Difference]: With dead ends: 91 [2020-12-22 03:43:23,482 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 03:43:23,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:43:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 03:43:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-22 03:43:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 03:43:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-22 03:43:23,485 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2020-12-22 03:43:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:23,485 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-22 03:43:23,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 03:43:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-22 03:43:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 03:43:23,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:23,486 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:23,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:23,687 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1725424782, now seen corresponding path program 73 times [2020-12-22 03:43:23,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:23,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820497597] [2020-12-22 03:43:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820497597] [2020-12-22 03:43:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159563958] [2020-12-22 03:43:27,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:27,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 03:43:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:27,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:27,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 03:43:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401871355] [2020-12-22 03:43:27,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 03:43:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 03:43:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:43:27,948 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 78 states. [2020-12-22 03:43:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:28,140 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-22 03:43:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 03:43:28,140 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 82 [2020-12-22 03:43:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:28,141 INFO L225 Difference]: With dead ends: 92 [2020-12-22 03:43:28,141 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 03:43:28,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:43:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 03:43:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-22 03:43:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 03:43:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-22 03:43:28,145 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-12-22 03:43:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:28,145 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-22 03:43:28,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 03:43:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-22 03:43:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 03:43:28,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:28,146 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:28,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 03:43:28,361 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash -425486994, now seen corresponding path program 74 times [2020-12-22 03:43:28,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:28,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057251143] [2020-12-22 03:43:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057251143] [2020-12-22 03:43:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687663863] [2020-12-22 03:43:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:32,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:32,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 03:43:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:32,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 03:43:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554802187] [2020-12-22 03:43:32,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 03:43:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 03:43:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:43:32,783 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 79 states. [2020-12-22 03:43:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:33,019 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-22 03:43:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 03:43:33,020 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 83 [2020-12-22 03:43:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:33,021 INFO L225 Difference]: With dead ends: 93 [2020-12-22 03:43:33,021 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 03:43:33,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:43:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 03:43:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 03:43:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 03:43:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-12-22 03:43:33,026 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2020-12-22 03:43:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:33,026 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-12-22 03:43:33,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 03:43:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-12-22 03:43:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 03:43:33,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:33,028 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:33,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:33,229 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1615724686, now seen corresponding path program 75 times [2020-12-22 03:43:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:33,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109361661] [2020-12-22 03:43:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109361661] [2020-12-22 03:43:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382329192] [2020-12-22 03:43:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:37,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-12-22 03:43:37,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 03:43:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:37,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:37,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 03:43:37,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341634999] [2020-12-22 03:43:37,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 03:43:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 03:43:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:43:37,908 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 80 states. [2020-12-22 03:43:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:38,067 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-12-22 03:43:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 03:43:38,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 84 [2020-12-22 03:43:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:38,068 INFO L225 Difference]: With dead ends: 94 [2020-12-22 03:43:38,069 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 03:43:38,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:43:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 03:43:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 03:43:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 03:43:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-22 03:43:38,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-12-22 03:43:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:38,075 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-22 03:43:38,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 03:43:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-22 03:43:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 03:43:38,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:38,076 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:38,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:38,290 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 468777326, now seen corresponding path program 76 times [2020-12-22 03:43:38,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:38,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78167076] [2020-12-22 03:43:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:42,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78167076] [2020-12-22 03:43:42,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021641651] [2020-12-22 03:43:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:42,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 03:43:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:42,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:42,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 03:43:42,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910186472] [2020-12-22 03:43:42,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 03:43:42,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 03:43:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:43:42,903 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 81 states. [2020-12-22 03:43:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:43,078 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-12-22 03:43:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 03:43:43,078 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 85 [2020-12-22 03:43:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:43,079 INFO L225 Difference]: With dead ends: 95 [2020-12-22 03:43:43,079 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 03:43:43,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:43:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 03:43:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 03:43:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 03:43:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-22 03:43:43,084 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2020-12-22 03:43:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:43,084 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-22 03:43:43,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 03:43:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-22 03:43:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 03:43:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:43,085 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:43,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 03:43:43,299 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -726852466, now seen corresponding path program 77 times [2020-12-22 03:43:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:43,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091735637] [2020-12-22 03:43:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091735637] [2020-12-22 03:43:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437126213] [2020-12-22 03:43:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:48,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-22 03:43:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 03:43:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:48,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:48,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-22 03:43:48,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321109409] [2020-12-22 03:43:48,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 03:43:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 03:43:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:43:48,312 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 82 states. [2020-12-22 03:43:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:48,560 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-12-22 03:43:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 03:43:48,561 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 86 [2020-12-22 03:43:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:48,562 INFO L225 Difference]: With dead ends: 96 [2020-12-22 03:43:48,562 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 03:43:48,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:43:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 03:43:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 03:43:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 03:43:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-22 03:43:48,567 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-12-22 03:43:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:48,567 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-22 03:43:48,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 03:43:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-22 03:43:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 03:43:48,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:48,568 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:48,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 03:43:48,781 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:48,782 INFO L82 PathProgramCache]: Analyzing trace with hash 863329646, now seen corresponding path program 78 times [2020-12-22 03:43:48,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:48,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150038782] [2020-12-22 03:43:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:53,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150038782] [2020-12-22 03:43:53,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279905136] [2020-12-22 03:43:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:53,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2020-12-22 03:43:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 03:43:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:53,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:53,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-22 03:43:53,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826734060] [2020-12-22 03:43:53,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 03:43:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 03:43:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:43:53,806 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 83 states. [2020-12-22 03:43:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:53,958 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-12-22 03:43:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 03:43:53,959 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 87 [2020-12-22 03:43:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:53,960 INFO L225 Difference]: With dead ends: 97 [2020-12-22 03:43:53,960 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 03:43:53,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:43:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 03:43:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 03:43:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 03:43:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-22 03:43:53,963 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2020-12-22 03:43:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:53,963 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-22 03:43:53,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 03:43:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-22 03:43:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 03:43:53,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:53,964 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:54,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:54,164 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1380632434, now seen corresponding path program 79 times [2020-12-22 03:43:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:54,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495850869] [2020-12-22 03:43:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495850869] [2020-12-22 03:43:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890431580] [2020-12-22 03:43:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 03:43:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:59,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:59,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-22 03:43:59,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320819624] [2020-12-22 03:43:59,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 03:43:59,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 03:43:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:43:59,200 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 84 states. [2020-12-22 03:43:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:59,417 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-12-22 03:43:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 03:43:59,418 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 88 [2020-12-22 03:43:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:59,419 INFO L225 Difference]: With dead ends: 98 [2020-12-22 03:43:59,419 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 03:43:59,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:43:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 03:43:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-22 03:43:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 03:43:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-22 03:43:59,423 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-12-22 03:43:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-22 03:43:59,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 03:43:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-22 03:43:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 03:43:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:59,424 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:59,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:59,640 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2070987118, now seen corresponding path program 80 times [2020-12-22 03:43:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:59,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655868995] [2020-12-22 03:43:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:04,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655868995] [2020-12-22 03:44:04,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100032426] [2020-12-22 03:44:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:04,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 03:44:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:04,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:04,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-22 03:44:04,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329715718] [2020-12-22 03:44:04,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 03:44:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 03:44:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:44:04,967 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 85 states. [2020-12-22 03:44:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:05,141 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-22 03:44:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 03:44:05,142 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 89 [2020-12-22 03:44:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:05,143 INFO L225 Difference]: With dead ends: 99 [2020-12-22 03:44:05,143 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 03:44:05,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:44:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 03:44:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-22 03:44:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 03:44:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-22 03:44:05,148 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2020-12-22 03:44:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:05,148 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-22 03:44:05,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 03:44:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-22 03:44:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 03:44:05,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:05,149 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:05,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:05,365 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1697010830, now seen corresponding path program 81 times [2020-12-22 03:44:05,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209975233] [2020-12-22 03:44:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:10,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209975233] [2020-12-22 03:44:10,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349389251] [2020-12-22 03:44:10,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:10,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-12-22 03:44:10,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 03:44:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:10,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:10,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-22 03:44:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728417357] [2020-12-22 03:44:10,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 03:44:10,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 03:44:10,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:44:10,767 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 86 states. [2020-12-22 03:44:11,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:11,006 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-22 03:44:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 03:44:11,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 90 [2020-12-22 03:44:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:11,008 INFO L225 Difference]: With dead ends: 100 [2020-12-22 03:44:11,008 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 03:44:11,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:44:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 03:44:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-22 03:44:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 03:44:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-12-22 03:44:11,010 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-12-22 03:44:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:11,011 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-12-22 03:44:11,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 03:44:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-12-22 03:44:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 03:44:11,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:11,012 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:11,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:11,215 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:11,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1306319506, now seen corresponding path program 82 times [2020-12-22 03:44:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:11,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041472517] [2020-12-22 03:44:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041472517] [2020-12-22 03:44:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237201054] [2020-12-22 03:44:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:16,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 03:44:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:16,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:16,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-22 03:44:16,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110064159] [2020-12-22 03:44:16,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 03:44:16,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:16,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 03:44:16,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:44:16,926 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 87 states. [2020-12-22 03:44:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:17,105 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-12-22 03:44:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 03:44:17,107 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 91 [2020-12-22 03:44:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:17,107 INFO L225 Difference]: With dead ends: 101 [2020-12-22 03:44:17,107 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 03:44:17,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:44:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 03:44:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 03:44:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 03:44:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-22 03:44:17,112 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2020-12-22 03:44:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:17,112 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-22 03:44:17,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 03:44:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-22 03:44:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 03:44:17,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:17,113 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:17,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:17,326 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash 79720590, now seen corresponding path program 83 times [2020-12-22 03:44:17,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:17,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245833568] [2020-12-22 03:44:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:22,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245833568] [2020-12-22 03:44:22,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059533349] [2020-12-22 03:44:22,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:22,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 03:44:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 03:44:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:23,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:23,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-22 03:44:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834641666] [2020-12-22 03:44:23,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 03:44:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 03:44:23,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:44:23,110 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 88 states. [2020-12-22 03:44:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:23,367 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-12-22 03:44:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 03:44:23,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 92 [2020-12-22 03:44:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:23,369 INFO L225 Difference]: With dead ends: 102 [2020-12-22 03:44:23,369 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 03:44:23,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:44:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 03:44:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-22 03:44:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 03:44:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-12-22 03:44:23,373 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-12-22 03:44:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:23,373 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-12-22 03:44:23,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 03:44:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-12-22 03:44:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 03:44:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:23,374 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:23,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-12-22 03:44:23,587 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash 97290606, now seen corresponding path program 84 times [2020-12-22 03:44:23,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:23,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926604035] [2020-12-22 03:44:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:29,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926604035] [2020-12-22 03:44:29,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431975493] [2020-12-22 03:44:29,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:29,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-22 03:44:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 03:44:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:29,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:29,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-22 03:44:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111603610] [2020-12-22 03:44:29,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-22 03:44:29,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:29,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-22 03:44:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 03:44:29,552 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 89 states. [2020-12-22 03:44:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:29,822 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-12-22 03:44:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 03:44:29,822 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 93 [2020-12-22 03:44:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:29,823 INFO L225 Difference]: With dead ends: 103 [2020-12-22 03:44:29,823 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 03:44:29,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 03:44:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 03:44:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 03:44:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 03:44:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-22 03:44:29,826 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2020-12-22 03:44:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:29,826 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-22 03:44:29,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-22 03:44:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-22 03:44:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 03:44:29,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:29,827 INFO L422 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:30,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:30,028 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:30,028 INFO L82 PathProgramCache]: Analyzing trace with hash 641961102, now seen corresponding path program 85 times [2020-12-22 03:44:30,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:30,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127635737] [2020-12-22 03:44:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:35,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127635737] [2020-12-22 03:44:35,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807249175] [2020-12-22 03:44:35,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 03:44:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:36,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:36,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-22 03:44:36,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106413582] [2020-12-22 03:44:36,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-22 03:44:36,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:36,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-22 03:44:36,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 03:44:36,233 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 90 states. [2020-12-22 03:44:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:36,445 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-22 03:44:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 03:44:36,446 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 94 [2020-12-22 03:44:36,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:36,447 INFO L225 Difference]: With dead ends: 104 [2020-12-22 03:44:36,447 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 03:44:36,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 03:44:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 03:44:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 03:44:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 03:44:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-22 03:44:36,450 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-12-22 03:44:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:36,450 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-22 03:44:36,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-22 03:44:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-22 03:44:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 03:44:36,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:36,451 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 03:44:36,652 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 346877294, now seen corresponding path program 86 times [2020-12-22 03:44:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718507130] [2020-12-22 03:44:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718507130] [2020-12-22 03:44:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957412127] [2020-12-22 03:44:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:42,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:42,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 03:44:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:42,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:42,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-12-22 03:44:42,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764997073] [2020-12-22 03:44:42,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-22 03:44:42,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:42,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-22 03:44:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 03:44:42,956 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 91 states. [2020-12-22 03:44:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:43,151 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-12-22 03:44:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-22 03:44:43,152 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 95 [2020-12-22 03:44:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:43,153 INFO L225 Difference]: With dead ends: 105 [2020-12-22 03:44:43,153 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 03:44:43,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 03:44:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 03:44:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-22 03:44:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 03:44:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-22 03:44:43,157 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2020-12-22 03:44:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:43,157 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-22 03:44:43,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-22 03:44:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-22 03:44:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 03:44:43,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:43,158 INFO L422 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:43,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-22 03:44:43,372 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash -210786162, now seen corresponding path program 87 times [2020-12-22 03:44:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:43,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965773457] [2020-12-22 03:44:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:49,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965773457] [2020-12-22 03:44:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490265297] [2020-12-22 03:44:49,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2020-12-22 03:44:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 03:44:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:49,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:49,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-22 03:44:49,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498718605] [2020-12-22 03:44:49,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-22 03:44:49,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:49,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-22 03:44:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 03:44:49,801 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 92 states. [2020-12-22 03:44:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:50,001 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-12-22 03:44:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-22 03:44:50,002 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 96 [2020-12-22 03:44:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:50,003 INFO L225 Difference]: With dead ends: 106 [2020-12-22 03:44:50,003 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 03:44:50,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 03:44:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 03:44:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-22 03:44:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 03:44:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-22 03:44:50,007 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-12-22 03:44:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:50,008 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-22 03:44:50,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-22 03:44:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-22 03:44:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 03:44:50,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:50,009 INFO L422 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:50,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:50,224 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -318484114, now seen corresponding path program 88 times [2020-12-22 03:44:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:50,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289531344] [2020-12-22 03:44:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:56,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289531344] [2020-12-22 03:44:56,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552347383] [2020-12-22 03:44:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:56,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 03:44:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:56,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:56,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-12-22 03:44:56,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556913064] [2020-12-22 03:44:56,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-22 03:44:56,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:56,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-22 03:44:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 03:44:56,738 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 93 states. [2020-12-22 03:44:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:56,933 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-12-22 03:44:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-22 03:44:56,934 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 97 [2020-12-22 03:44:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:56,935 INFO L225 Difference]: With dead ends: 107 [2020-12-22 03:44:56,935 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 03:44:56,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 03:44:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 03:44:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-22 03:44:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 03:44:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-22 03:44:56,939 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-12-22 03:44:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:56,939 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-22 03:44:56,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-22 03:44:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-22 03:44:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 03:44:56,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:56,939 INFO L422 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:57,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:57,153 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash 637846670, now seen corresponding path program 89 times [2020-12-22 03:44:57,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:57,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874733352] [2020-12-22 03:44:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:03,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874733352] [2020-12-22 03:45:03,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314673296] [2020-12-22 03:45:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:03,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-22 03:45:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-22 03:45:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:03,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:03,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-12-22 03:45:03,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603090080] [2020-12-22 03:45:03,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-22 03:45:03,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-22 03:45:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 03:45:03,897 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 94 states. [2020-12-22 03:45:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:04,133 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-12-22 03:45:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-22 03:45:04,134 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 98 [2020-12-22 03:45:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:04,135 INFO L225 Difference]: With dead ends: 108 [2020-12-22 03:45:04,135 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 03:45:04,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 03:45:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 03:45:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-22 03:45:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 03:45:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-12-22 03:45:04,139 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-12-22 03:45:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:04,139 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-12-22 03:45:04,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-22 03:45:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-12-22 03:45:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 03:45:04,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:04,140 INFO L422 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:04,341 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 219329902, now seen corresponding path program 90 times [2020-12-22 03:45:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:04,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444173958] [2020-12-22 03:45:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat