/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/bitvector/soft_float_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:14:36,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:14:36,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:14:36,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 23:14:36,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:14:36,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:14:36,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:14:36,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:14:36,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:14:36,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:14:36,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:14:36,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:14:36,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:14:36,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:14:36,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:14:36,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:14:36,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:14:36,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:14:36,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:14:36,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:14:36,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:14:37,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:14:37,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:14:37,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:14:37,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:14:37,025 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:14:37,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:14:37,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:14:37,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:14:37,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:14:37,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:14:37,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:14:37,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:14:37,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:14:37,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:14:37,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:14:37,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:14:37,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:14:37,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:14:37,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:14:37,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:14:37,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:14:37,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:14:37,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:14:37,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:14:37,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:14:37,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:14:37,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:14:37,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:14:37,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:14:37,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:14:37,567 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:14:37,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2020-12-21 23:14:37,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f747414e/89bed30cbbf646969a39098ee2e41da0/FLAGc26e5f30c [2020-12-21 23:14:38,474 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:14:38,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2020-12-21 23:14:38,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f747414e/89bed30cbbf646969a39098ee2e41da0/FLAGc26e5f30c [2020-12-21 23:14:38,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f747414e/89bed30cbbf646969a39098ee2e41da0 [2020-12-21 23:14:38,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:14:38,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:14:38,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:14:38,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:14:38,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:14:38,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:38" (1/1) ... [2020-12-21 23:14:38,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500de11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:38, skipping insertion in model container [2020-12-21 23:14:38,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:38" (1/1) ... [2020-12-21 23:14:38,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:14:38,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:14:38,985 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/bitvector/soft_float_3a.c.cil.c[423,436] [2020-12-21 23:14:39,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:14:39,052 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:14:39,066 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/bitvector/soft_float_3a.c.cil.c[423,436] [2020-12-21 23:14:39,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:14:39,119 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:14:39,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39 WrapperNode [2020-12-21 23:14:39,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:14:39,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:14:39,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:14:39,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:14:39,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:14:39,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:14:39,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:14:39,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:14:39,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (1/1) ... [2020-12-21 23:14:39,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:14:39,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:14:39,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:14:39,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:14:39,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (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 [2020-12-21 23:14:39,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:14:39,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:14:39,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:14:39,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:14:40,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:14:40,226 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-21 23:14:40,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:40 BoogieIcfgContainer [2020-12-21 23:14:40,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:14:40,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:14:40,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:14:40,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:14:40,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:14:38" (1/3) ... [2020-12-21 23:14:40,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5648fe31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:40, skipping insertion in model container [2020-12-21 23:14:40,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:39" (2/3) ... [2020-12-21 23:14:40,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5648fe31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:40, skipping insertion in model container [2020-12-21 23:14:40,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:40" (3/3) ... [2020-12-21 23:14:40,236 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2020-12-21 23:14:40,243 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:14:40,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:14:40,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:14:40,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:14:40,294 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:14:40,294 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:14:40,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:14:40,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:14:40,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:14:40,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:14:40,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:14:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-12-21 23:14:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:14:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:40,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:40,319 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -974575069, now seen corresponding path program 1 times [2020-12-21 23:14:40,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:40,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587369952] [2020-12-21 23:14:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:40,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587369952] [2020-12-21 23:14:40,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:40,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:14:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145265862] [2020-12-21 23:14:40,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:14:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:14:40,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:14:40,690 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-12-21 23:14:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:40,748 INFO L93 Difference]: Finished difference Result 137 states and 231 transitions. [2020-12-21 23:14:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:14:40,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-21 23:14:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:40,766 INFO L225 Difference]: With dead ends: 137 [2020-12-21 23:14:40,767 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 23:14:40,772 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 [2020-12-21 23:14:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 23:14:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-21 23:14:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 23:14:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 100 transitions. [2020-12-21 23:14:40,843 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 100 transitions. Word has length 24 [2020-12-21 23:14:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:40,844 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 100 transitions. [2020-12-21 23:14:40,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:14:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 100 transitions. [2020-12-21 23:14:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:14:40,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:40,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:40,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:14:40,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash 203043037, now seen corresponding path program 1 times [2020-12-21 23:14:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:40,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83365301] [2020-12-21 23:14:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83365301] [2020-12-21 23:14:40,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:40,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:14:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396011822] [2020-12-21 23:14:40,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:14:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:14:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:14:40,996 INFO L87 Difference]: Start difference. First operand 67 states and 100 transitions. Second operand 4 states. [2020-12-21 23:14:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:41,072 INFO L93 Difference]: Finished difference Result 76 states and 110 transitions. [2020-12-21 23:14:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:14:41,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-21 23:14:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:41,075 INFO L225 Difference]: With dead ends: 76 [2020-12-21 23:14:41,080 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 23:14:41,082 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 [2020-12-21 23:14:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 23:14:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-21 23:14:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 23:14:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 99 transitions. [2020-12-21 23:14:41,100 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 99 transitions. Word has length 26 [2020-12-21 23:14:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:41,104 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 99 transitions. [2020-12-21 23:14:41,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:14:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 99 transitions. [2020-12-21 23:14:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:14:41,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:41,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:41,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:14:41,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1978050399, now seen corresponding path program 1 times [2020-12-21 23:14:41,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:41,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783632147] [2020-12-21 23:14:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783632147] [2020-12-21 23:14:41,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:41,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:14:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449298848] [2020-12-21 23:14:41,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:14:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:41,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:14:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:14:41,198 INFO L87 Difference]: Start difference. First operand 67 states and 99 transitions. Second operand 3 states. [2020-12-21 23:14:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:41,325 INFO L93 Difference]: Finished difference Result 117 states and 170 transitions. [2020-12-21 23:14:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:14:41,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-21 23:14:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:41,328 INFO L225 Difference]: With dead ends: 117 [2020-12-21 23:14:41,328 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 23:14:41,329 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 [2020-12-21 23:14:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 23:14:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-21 23:14:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 23:14:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-12-21 23:14:41,340 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 26 [2020-12-21 23:14:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:41,340 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-12-21 23:14:41,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:14:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-12-21 23:14:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 23:14:41,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:41,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:41,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:14:41,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:41,346 INFO L82 PathProgramCache]: Analyzing trace with hash -305137814, now seen corresponding path program 1 times [2020-12-21 23:14:41,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287340753] [2020-12-21 23:14:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287340753] [2020-12-21 23:14:41,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:14:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666525987] [2020-12-21 23:14:41,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:14:41,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:14:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:14:41,425 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 3 states. [2020-12-21 23:14:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:41,487 INFO L93 Difference]: Finished difference Result 127 states and 181 transitions. [2020-12-21 23:14:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:14:41,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-21 23:14:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:41,489 INFO L225 Difference]: With dead ends: 127 [2020-12-21 23:14:41,489 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 23:14:41,490 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 [2020-12-21 23:14:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 23:14:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-12-21 23:14:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 23:14:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2020-12-21 23:14:41,499 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 29 [2020-12-21 23:14:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:41,499 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2020-12-21 23:14:41,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:14:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2020-12-21 23:14:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 23:14:41,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:41,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:41,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 23:14:41,502 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 334289259, now seen corresponding path program 1 times [2020-12-21 23:14:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843846272] [2020-12-21 23:14:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843846272] [2020-12-21 23:14:41,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:41,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:14:41,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083377435] [2020-12-21 23:14:41,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:14:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:14:41,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:14:41,653 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand 4 states. [2020-12-21 23:14:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:41,873 INFO L93 Difference]: Finished difference Result 134 states and 187 transitions. [2020-12-21 23:14:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:14:41,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-21 23:14:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:41,875 INFO L225 Difference]: With dead ends: 134 [2020-12-21 23:14:41,875 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 23:14:41,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:14:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 23:14:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-12-21 23:14:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 23:14:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-12-21 23:14:41,882 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-12-21 23:14:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:41,883 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-12-21 23:14:41,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:14:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-12-21 23:14:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 23:14:41,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:41,884 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:41,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 23:14:41,885 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1562799633, now seen corresponding path program 1 times [2020-12-21 23:14:41,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:41,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663376059] [2020-12-21 23:14:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663376059] [2020-12-21 23:14:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655310815] [2020-12-21 23:14:41,925 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 [2020-12-21 23:14:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:14:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:42,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:42,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 23:14:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910754850] [2020-12-21 23:14:42,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:14:42,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:14:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:14:42,169 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 5 states. [2020-12-21 23:14:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:42,254 INFO L93 Difference]: Finished difference Result 157 states and 215 transitions. [2020-12-21 23:14:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:14:42,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-21 23:14:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:42,258 INFO L225 Difference]: With dead ends: 157 [2020-12-21 23:14:42,258 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 23:14:42,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:14:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 23:14:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-12-21 23:14:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 23:14:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2020-12-21 23:14:42,280 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 32 [2020-12-21 23:14:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:42,280 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2020-12-21 23:14:42,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:14:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2020-12-21 23:14:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 23:14:42,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:42,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:42,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 23:14:42,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 125846098, now seen corresponding path program 1 times [2020-12-21 23:14:42,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:42,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943103036] [2020-12-21 23:14:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:42,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943103036] [2020-12-21 23:14:42,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787484458] [2020-12-21 23:14:42,616 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 [2020-12-21 23:14:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 23:14:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:14:42,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:14:42,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-21 23:14:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085868047] [2020-12-21 23:14:42,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:14:42,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:42,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:14:42,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:42,887 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand 6 states. [2020-12-21 23:14:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:43,154 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2020-12-21 23:14:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:14:43,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-21 23:14:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:43,156 INFO L225 Difference]: With dead ends: 150 [2020-12-21 23:14:43,156 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 23:14:43,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:14:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 23:14:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-12-21 23:14:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 23:14:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2020-12-21 23:14:43,163 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 34 [2020-12-21 23:14:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:43,163 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2020-12-21 23:14:43,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:14:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2020-12-21 23:14:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 23:14:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:43,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:43,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:43,379 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 384011536, now seen corresponding path program 1 times [2020-12-21 23:14:43,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:43,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211830701] [2020-12-21 23:14:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211830701] [2020-12-21 23:14:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288538570] [2020-12-21 23:14:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:14:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 23:14:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:14:43,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:14:43,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-21 23:14:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826658462] [2020-12-21 23:14:43,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:14:43,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:43,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:14:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:43,720 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand 6 states. [2020-12-21 23:14:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:43,933 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2020-12-21 23:14:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:14:43,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-21 23:14:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:43,935 INFO L225 Difference]: With dead ends: 135 [2020-12-21 23:14:43,935 INFO L226 Difference]: Without dead ends: 131 [2020-12-21 23:14:43,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:14:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-21 23:14:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2020-12-21 23:14:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 23:14:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2020-12-21 23:14:43,957 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 34 [2020-12-21 23:14:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:43,957 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2020-12-21 23:14:43,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:14:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2020-12-21 23:14:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 23:14:43,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:43,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:44,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:44,174 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -280527414, now seen corresponding path program 1 times [2020-12-21 23:14:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:44,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440868071] [2020-12-21 23:14:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440868071] [2020-12-21 23:14:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318558695] [2020-12-21 23:14:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:14:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 23:14:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:14:44,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:14:44,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-21 23:14:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298613617] [2020-12-21 23:14:44,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:14:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:14:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:44,404 INFO L87 Difference]: Start difference. First operand 97 states and 132 transitions. Second operand 6 states. [2020-12-21 23:14:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:44,501 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2020-12-21 23:14:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:14:44,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-12-21 23:14:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:44,502 INFO L225 Difference]: With dead ends: 122 [2020-12-21 23:14:44,503 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 23:14:44,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:14:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 23:14:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-12-21 23:14:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-21 23:14:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2020-12-21 23:14:44,509 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 36 [2020-12-21 23:14:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:44,510 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2020-12-21 23:14:44,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:14:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2020-12-21 23:14:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 23:14:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:44,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:44,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:44,726 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -278680372, now seen corresponding path program 1 times [2020-12-21 23:14:44,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:44,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912873642] [2020-12-21 23:14:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:14:44,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912873642] [2020-12-21 23:14:44,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:14:44,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 23:14:44,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372021415] [2020-12-21 23:14:44,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:14:44,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:44,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:14:44,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:14:44,794 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand 5 states. [2020-12-21 23:14:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:44,832 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-12-21 23:14:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:14:44,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-12-21 23:14:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:44,834 INFO L225 Difference]: With dead ends: 117 [2020-12-21 23:14:44,834 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 23:14:44,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:14:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 23:14:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-21 23:14:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 23:14:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-12-21 23:14:44,842 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 36 [2020-12-21 23:14:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:44,843 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-12-21 23:14:44,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:14:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-12-21 23:14:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 23:14:44,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:44,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:44,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:14:44,844 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash 398825851, now seen corresponding path program 1 times [2020-12-21 23:14:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:44,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648518186] [2020-12-21 23:14:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:44,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648518186] [2020-12-21 23:14:44,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59173651] [2020-12-21 23:14:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:14:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:45,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 23:14:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:45,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:45,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 23:14:45,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455018856] [2020-12-21 23:14:45,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:14:45,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:14:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:14:45,176 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 6 states. [2020-12-21 23:14:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:45,350 INFO L93 Difference]: Finished difference Result 190 states and 250 transitions. [2020-12-21 23:14:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:14:45,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-12-21 23:14:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:45,352 INFO L225 Difference]: With dead ends: 190 [2020-12-21 23:14:45,352 INFO L226 Difference]: Without dead ends: 105 [2020-12-21 23:14:45,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:14:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-21 23:14:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-12-21 23:14:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 23:14:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2020-12-21 23:14:45,357 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 38 [2020-12-21 23:14:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:45,358 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2020-12-21 23:14:45,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:14:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2020-12-21 23:14:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 23:14:45,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:45,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:45,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 23:14:45,572 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -446767821, now seen corresponding path program 1 times [2020-12-21 23:14:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:45,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662123446] [2020-12-21 23:14:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662123446] [2020-12-21 23:14:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001014263] [2020-12-21 23:14:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:14:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:14:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:45,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:45,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 23:14:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784468483] [2020-12-21 23:14:45,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:14:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:14:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:14:45,798 INFO L87 Difference]: Start difference. First operand 101 states and 131 transitions. Second operand 6 states. [2020-12-21 23:14:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:45,858 INFO L93 Difference]: Finished difference Result 236 states and 307 transitions. [2020-12-21 23:14:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:14:45,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-12-21 23:14:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:45,862 INFO L225 Difference]: With dead ends: 236 [2020-12-21 23:14:45,862 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 23:14:45,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:14:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 23:14:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2020-12-21 23:14:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-21 23:14:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-12-21 23:14:45,869 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 39 [2020-12-21 23:14:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:45,869 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-12-21 23:14:45,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:14:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-12-21 23:14:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 23:14:45,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:45,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:46,088 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1086542156, now seen corresponding path program 2 times [2020-12-21 23:14:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:46,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8306418] [2020-12-21 23:14:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8306418] [2020-12-21 23:14:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896639142] [2020-12-21 23:14:46,172 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 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 [2020-12-21 23:14:46,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:14:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 23:14:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:46,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:46,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 23:14:46,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12507140] [2020-12-21 23:14:46,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:14:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:14:46,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:14:46,521 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 7 states. [2020-12-21 23:14:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:46,720 INFO L93 Difference]: Finished difference Result 193 states and 253 transitions. [2020-12-21 23:14:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:14:46,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-21 23:14:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:46,722 INFO L225 Difference]: With dead ends: 193 [2020-12-21 23:14:46,722 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 23:14:46,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:14:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 23:14:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-12-21 23:14:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 23:14:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2020-12-21 23:14:46,728 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 41 [2020-12-21 23:14:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:46,729 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2020-12-21 23:14:46,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:14:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2020-12-21 23:14:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 23:14:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:46,730 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:46,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:46,946 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 751464218, now seen corresponding path program 2 times [2020-12-21 23:14:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094168862] [2020-12-21 23:14:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094168862] [2020-12-21 23:14:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727010096] [2020-12-21 23:14:47,037 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 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 [2020-12-21 23:14:47,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:14:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:47,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 23:14:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:47,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:47,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 23:14:47,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919428258] [2020-12-21 23:14:47,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:14:47,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:14:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:14:47,216 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand 7 states. [2020-12-21 23:14:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:47,267 INFO L93 Difference]: Finished difference Result 239 states and 310 transitions. [2020-12-21 23:14:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:14:47,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-12-21 23:14:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:47,269 INFO L225 Difference]: With dead ends: 239 [2020-12-21 23:14:47,269 INFO L226 Difference]: Without dead ends: 155 [2020-12-21 23:14:47,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:14:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-21 23:14:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2020-12-21 23:14:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 23:14:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2020-12-21 23:14:47,275 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 42 [2020-12-21 23:14:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:47,276 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2020-12-21 23:14:47,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:14:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2020-12-21 23:14:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 23:14:47,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:47,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:47,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 23:14:47,491 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash -636788005, now seen corresponding path program 3 times [2020-12-21 23:14:47,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:47,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074666065] [2020-12-21 23:14:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074666065] [2020-12-21 23:14:47,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297505092] [2020-12-21 23:14:47,594 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 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 [2020-12-21 23:14:47,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 23:14:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 23:14:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:48,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:48,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 23:14:48,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843776433] [2020-12-21 23:14:48,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 23:14:48,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:48,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 23:14:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:14:48,126 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand 8 states. [2020-12-21 23:14:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:48,261 INFO L93 Difference]: Finished difference Result 196 states and 256 transitions. [2020-12-21 23:14:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:14:48,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-21 23:14:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:48,263 INFO L225 Difference]: With dead ends: 196 [2020-12-21 23:14:48,263 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 23:14:48,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:14:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 23:14:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-21 23:14:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 23:14:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2020-12-21 23:14:48,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 44 [2020-12-21 23:14:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:48,270 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2020-12-21 23:14:48,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 23:14:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2020-12-21 23:14:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 23:14:48,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:48,271 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:48,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 23:14:48,486 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1808941011, now seen corresponding path program 3 times [2020-12-21 23:14:48,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:48,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012130345] [2020-12-21 23:14:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012130345] [2020-12-21 23:14:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480387430] [2020-12-21 23:14:48,600 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 [2020-12-21 23:14:48,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 23:14:48,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 23:14:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:48,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:48,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 23:14:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652217360] [2020-12-21 23:14:48,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 23:14:48,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 23:14:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:14:48,954 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand 8 states. [2020-12-21 23:14:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:49,018 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2020-12-21 23:14:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:14:49,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-12-21 23:14:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:49,023 INFO L225 Difference]: With dead ends: 242 [2020-12-21 23:14:49,024 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 23:14:49,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:14:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 23:14:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2020-12-21 23:14:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 23:14:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-12-21 23:14:49,035 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 45 [2020-12-21 23:14:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:49,036 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-12-21 23:14:49,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 23:14:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-12-21 23:14:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 23:14:49,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:49,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:49,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 23:14:49,253 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1986128212, now seen corresponding path program 4 times [2020-12-21 23:14:49,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:49,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11674881] [2020-12-21 23:14:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:49,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11674881] [2020-12-21 23:14:49,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108094124] [2020-12-21 23:14:49,390 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 [2020-12-21 23:14:49,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:14:49,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:49,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 23:14:49,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 23:14:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841112045] [2020-12-21 23:14:49,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:14:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:14:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:49,605 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 9 states. [2020-12-21 23:14:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:49,827 INFO L93 Difference]: Finished difference Result 199 states and 259 transitions. [2020-12-21 23:14:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:14:49,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-21 23:14:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:49,828 INFO L225 Difference]: With dead ends: 199 [2020-12-21 23:14:49,829 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 23:14:49,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 23:14:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-12-21 23:14:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 23:14:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-12-21 23:14:49,834 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 47 [2020-12-21 23:14:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:49,835 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-12-21 23:14:49,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:14:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-12-21 23:14:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 23:14:49,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:49,836 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:50,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 23:14:50,048 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1514965114, now seen corresponding path program 4 times [2020-12-21 23:14:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:50,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435122372] [2020-12-21 23:14:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:50,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435122372] [2020-12-21 23:14:50,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433821588] [2020-12-21 23:14:50,168 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 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 [2020-12-21 23:14:50,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:14:50,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:50,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 23:14:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:50,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:50,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 23:14:50,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204057416] [2020-12-21 23:14:50,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:14:50,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:14:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:50,349 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 9 states. [2020-12-21 23:14:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:50,418 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2020-12-21 23:14:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:14:50,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-21 23:14:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:50,420 INFO L225 Difference]: With dead ends: 245 [2020-12-21 23:14:50,420 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 23:14:50,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:14:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 23:14:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2020-12-21 23:14:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-21 23:14:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2020-12-21 23:14:50,426 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 48 [2020-12-21 23:14:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:50,426 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2020-12-21 23:14:50,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:14:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2020-12-21 23:14:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 23:14:50,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:50,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:50,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 23:14:50,640 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1351834565, now seen corresponding path program 5 times [2020-12-21 23:14:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323600760] [2020-12-21 23:14:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323600760] [2020-12-21 23:14:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972321508] [2020-12-21 23:14:50,800 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 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 [2020-12-21 23:14:50,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 23:14:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 23:14:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:51,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:51,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 23:14:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477399028] [2020-12-21 23:14:51,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 23:14:51,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:51,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 23:14:51,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:14:51,077 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand 10 states. [2020-12-21 23:14:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:51,356 INFO L93 Difference]: Finished difference Result 202 states and 262 transitions. [2020-12-21 23:14:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:14:51,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-12-21 23:14:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:51,358 INFO L225 Difference]: With dead ends: 202 [2020-12-21 23:14:51,358 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 23:14:51,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:14:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 23:14:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-12-21 23:14:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 23:14:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2020-12-21 23:14:51,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 50 [2020-12-21 23:14:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:51,364 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2020-12-21 23:14:51,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 23:14:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2020-12-21 23:14:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 23:14:51,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:51,366 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:51,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:51,580 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1117334131, now seen corresponding path program 5 times [2020-12-21 23:14:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:51,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795581592] [2020-12-21 23:14:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795581592] [2020-12-21 23:14:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227976344] [2020-12-21 23:14:51,683 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 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 [2020-12-21 23:14:51,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 23:14:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 23:14:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:51,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:51,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 23:14:51,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758003358] [2020-12-21 23:14:51,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 23:14:51,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 23:14:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:14:51,810 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand 10 states. [2020-12-21 23:14:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:51,873 INFO L93 Difference]: Finished difference Result 248 states and 319 transitions. [2020-12-21 23:14:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:14:51,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 23:14:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:51,875 INFO L225 Difference]: With dead ends: 248 [2020-12-21 23:14:51,875 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 23:14:51,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:14:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 23:14:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2020-12-21 23:14:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 23:14:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2020-12-21 23:14:51,881 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 51 [2020-12-21 23:14:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:51,882 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2020-12-21 23:14:51,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 23:14:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2020-12-21 23:14:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 23:14:51,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:51,883 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:52,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:52,098 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1223119884, now seen corresponding path program 6 times [2020-12-21 23:14:52,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:52,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217679892] [2020-12-21 23:14:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:52,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217679892] [2020-12-21 23:14:52,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590877528] [2020-12-21 23:14:52,225 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 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 [2020-12-21 23:14:52,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 23:14:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 23:14:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:53,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:53,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 23:14:53,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025608330] [2020-12-21 23:14:53,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 23:14:53,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 23:14:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:14:53,153 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 11 states. [2020-12-21 23:14:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:53,403 INFO L93 Difference]: Finished difference Result 205 states and 265 transitions. [2020-12-21 23:14:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 23:14:53,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-12-21 23:14:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:53,404 INFO L225 Difference]: With dead ends: 205 [2020-12-21 23:14:53,405 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 23:14:53,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:14:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 23:14:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-12-21 23:14:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 23:14:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-12-21 23:14:53,412 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 53 [2020-12-21 23:14:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:53,413 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-12-21 23:14:53,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 23:14:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-12-21 23:14:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 23:14:53,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:53,417 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:53,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 23:14:53,627 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash 812521946, now seen corresponding path program 6 times [2020-12-21 23:14:53,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:53,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394707969] [2020-12-21 23:14:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:53,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394707969] [2020-12-21 23:14:53,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346246937] [2020-12-21 23:14:53,718 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 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 [2020-12-21 23:14:54,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-21 23:14:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 23:14:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:54,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:54,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 23:14:54,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519539089] [2020-12-21 23:14:54,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 23:14:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 23:14:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:14:54,098 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 11 states. [2020-12-21 23:14:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:54,169 INFO L93 Difference]: Finished difference Result 251 states and 322 transitions. [2020-12-21 23:14:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 23:14:54,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-12-21 23:14:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:54,170 INFO L225 Difference]: With dead ends: 251 [2020-12-21 23:14:54,171 INFO L226 Difference]: Without dead ends: 167 [2020-12-21 23:14:54,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:14:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-21 23:14:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2020-12-21 23:14:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 23:14:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2020-12-21 23:14:54,178 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 54 [2020-12-21 23:14:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:54,178 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2020-12-21 23:14:54,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 23:14:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2020-12-21 23:14:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 23:14:54,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:54,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:14:54,393 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2089853541, now seen corresponding path program 7 times [2020-12-21 23:14:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837464882] [2020-12-21 23:14:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:54,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837464882] [2020-12-21 23:14:54,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344311871] [2020-12-21 23:14:54,529 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 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 [2020-12-21 23:14:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 23:14:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:54,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 23:14:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418659556] [2020-12-21 23:14:54,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 23:14:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 23:14:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-21 23:14:54,800 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand 12 states. [2020-12-21 23:14:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:55,211 INFO L93 Difference]: Finished difference Result 208 states and 268 transitions. [2020-12-21 23:14:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 23:14:55,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-12-21 23:14:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:55,213 INFO L225 Difference]: With dead ends: 208 [2020-12-21 23:14:55,214 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 23:14:55,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-21 23:14:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 23:14:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-12-21 23:14:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 23:14:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2020-12-21 23:14:55,222 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 56 [2020-12-21 23:14:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:55,222 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2020-12-21 23:14:55,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 23:14:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2020-12-21 23:14:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 23:14:55,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:55,223 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:55,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 23:14:55,438 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash -286417645, now seen corresponding path program 7 times [2020-12-21 23:14:55,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:55,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929042719] [2020-12-21 23:14:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929042719] [2020-12-21 23:14:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880987160] [2020-12-21 23:14:55,536 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 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 [2020-12-21 23:14:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 23:14:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:55,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:55,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 23:14:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356363127] [2020-12-21 23:14:55,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 23:14:55,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 23:14:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 23:14:55,681 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand 12 states. [2020-12-21 23:14:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:55,756 INFO L93 Difference]: Finished difference Result 254 states and 325 transitions. [2020-12-21 23:14:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 23:14:55,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-21 23:14:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:55,757 INFO L225 Difference]: With dead ends: 254 [2020-12-21 23:14:55,757 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 23:14:55,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 23:14:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 23:14:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2020-12-21 23:14:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 23:14:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2020-12-21 23:14:55,764 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 57 [2020-12-21 23:14:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:55,764 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2020-12-21 23:14:55,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 23:14:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2020-12-21 23:14:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 23:14:55,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:55,765 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:55,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 23:14:55,967 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1608845676, now seen corresponding path program 8 times [2020-12-21 23:14:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:55,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818495714] [2020-12-21 23:14:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:56,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818495714] [2020-12-21 23:14:56,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701022065] [2020-12-21 23:14:56,149 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 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 [2020-12-21 23:14:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:14:56,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 23:14:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:56,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:56,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 23:14:56,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704948041] [2020-12-21 23:14:56,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 23:14:56,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 23:14:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:14:56,545 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand 13 states. [2020-12-21 23:14:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:56,759 INFO L93 Difference]: Finished difference Result 211 states and 271 transitions. [2020-12-21 23:14:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 23:14:56,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-12-21 23:14:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:56,761 INFO L225 Difference]: With dead ends: 211 [2020-12-21 23:14:56,761 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 23:14:56,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:14:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 23:14:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-12-21 23:14:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-21 23:14:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2020-12-21 23:14:56,767 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 59 [2020-12-21 23:14:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:56,767 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2020-12-21 23:14:56,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 23:14:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2020-12-21 23:14:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 23:14:56,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:56,768 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:56,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 23:14:56,983 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1739924282, now seen corresponding path program 8 times [2020-12-21 23:14:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:56,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190233799] [2020-12-21 23:14:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:57,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190233799] [2020-12-21 23:14:57,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932012974] [2020-12-21 23:14:57,092 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 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 [2020-12-21 23:14:57,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:14:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 23:14:57,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:57,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:57,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 23:14:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624721704] [2020-12-21 23:14:57,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 23:14:57,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 23:14:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:14:57,252 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand 13 states. [2020-12-21 23:14:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:57,343 INFO L93 Difference]: Finished difference Result 257 states and 328 transitions. [2020-12-21 23:14:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 23:14:57,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-12-21 23:14:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:57,351 INFO L225 Difference]: With dead ends: 257 [2020-12-21 23:14:57,351 INFO L226 Difference]: Without dead ends: 173 [2020-12-21 23:14:57,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:14:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-21 23:14:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 124. [2020-12-21 23:14:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-21 23:14:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2020-12-21 23:14:57,358 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 60 [2020-12-21 23:14:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:57,358 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2020-12-21 23:14:57,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 23:14:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2020-12-21 23:14:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 23:14:57,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:57,359 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:14:57,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 23:14:57,573 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:14:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:14:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash 85561083, now seen corresponding path program 9 times [2020-12-21 23:14:57,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:14:57,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172911932] [2020-12-21 23:14:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:14:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:14:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172911932] [2020-12-21 23:14:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461651926] [2020-12-21 23:14:57,766 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 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 [2020-12-21 23:14:59,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 23:14:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:14:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 23:14:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:14:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:14:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:14:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 23:14:59,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707232268] [2020-12-21 23:14:59,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 23:14:59,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:14:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 23:14:59,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:14:59,358 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand 14 states. [2020-12-21 23:14:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:14:59,832 INFO L93 Difference]: Finished difference Result 214 states and 274 transitions. [2020-12-21 23:14:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 23:14:59,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-12-21 23:14:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:14:59,836 INFO L225 Difference]: With dead ends: 214 [2020-12-21 23:14:59,837 INFO L226 Difference]: Without dead ends: 129 [2020-12-21 23:14:59,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:14:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-21 23:14:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2020-12-21 23:14:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 23:14:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2020-12-21 23:14:59,844 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 62 [2020-12-21 23:14:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:14:59,844 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2020-12-21 23:14:59,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 23:14:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2020-12-21 23:14:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 23:14:59,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:14:59,845 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:00,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 23:15:00,050 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1568041037, now seen corresponding path program 9 times [2020-12-21 23:15:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:00,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456006571] [2020-12-21 23:15:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456006571] [2020-12-21 23:15:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806200416] [2020-12-21 23:15:00,181 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 [2020-12-21 23:15:00,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 23:15:00,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 23:15:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:00,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:00,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 23:15:00,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636338522] [2020-12-21 23:15:00,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 23:15:00,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 23:15:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:15:00,726 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand 14 states. [2020-12-21 23:15:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:00,796 INFO L93 Difference]: Finished difference Result 260 states and 331 transitions. [2020-12-21 23:15:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 23:15:00,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-12-21 23:15:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:00,798 INFO L225 Difference]: With dead ends: 260 [2020-12-21 23:15:00,798 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 23:15:00,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:15:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 23:15:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2020-12-21 23:15:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 23:15:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2020-12-21 23:15:00,805 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 63 [2020-12-21 23:15:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:00,805 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2020-12-21 23:15:00,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 23:15:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2020-12-21 23:15:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 23:15:00,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:00,806 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:01,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:01,011 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash -593311436, now seen corresponding path program 10 times [2020-12-21 23:15:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:01,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861644320] [2020-12-21 23:15:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861644320] [2020-12-21 23:15:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858894875] [2020-12-21 23:15:01,223 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 [2020-12-21 23:15:01,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:15:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 23:15:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:01,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:01,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 23:15:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296643044] [2020-12-21 23:15:01,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 23:15:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:01,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 23:15:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:15:01,601 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand 15 states. [2020-12-21 23:15:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:02,203 INFO L93 Difference]: Finished difference Result 217 states and 277 transitions. [2020-12-21 23:15:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 23:15:02,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-12-21 23:15:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:02,205 INFO L225 Difference]: With dead ends: 217 [2020-12-21 23:15:02,205 INFO L226 Difference]: Without dead ends: 132 [2020-12-21 23:15:02,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:15:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-21 23:15:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-21 23:15:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-21 23:15:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2020-12-21 23:15:02,211 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 65 [2020-12-21 23:15:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:02,212 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2020-12-21 23:15:02,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 23:15:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2020-12-21 23:15:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 23:15:02,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:02,213 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:02,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 23:15:02,421 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1138252646, now seen corresponding path program 10 times [2020-12-21 23:15:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:02,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757783396] [2020-12-21 23:15:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:02,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757783396] [2020-12-21 23:15:02,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388903515] [2020-12-21 23:15:02,582 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 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 [2020-12-21 23:15:02,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:15:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 23:15:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:02,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:02,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 23:15:02,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215629608] [2020-12-21 23:15:02,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 23:15:02,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 23:15:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:15:02,742 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 15 states. [2020-12-21 23:15:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:02,840 INFO L93 Difference]: Finished difference Result 263 states and 334 transitions. [2020-12-21 23:15:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 23:15:02,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-21 23:15:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:02,842 INFO L225 Difference]: With dead ends: 263 [2020-12-21 23:15:02,842 INFO L226 Difference]: Without dead ends: 179 [2020-12-21 23:15:02,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:15:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-21 23:15:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 130. [2020-12-21 23:15:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-21 23:15:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-12-21 23:15:02,851 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 66 [2020-12-21 23:15:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-12-21 23:15:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 23:15:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-12-21 23:15:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 23:15:02,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:02,852 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:03,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:03,066 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:03,067 INFO L82 PathProgramCache]: Analyzing trace with hash 116471899, now seen corresponding path program 11 times [2020-12-21 23:15:03,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:03,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986055210] [2020-12-21 23:15:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986055210] [2020-12-21 23:15:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041840153] [2020-12-21 23:15:03,334 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 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 [2020-12-21 23:15:03,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 23:15:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 23:15:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:03,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:03,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 23:15:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024978771] [2020-12-21 23:15:03,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 23:15:03,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 23:15:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:15:03,733 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 16 states. [2020-12-21 23:15:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:04,337 INFO L93 Difference]: Finished difference Result 220 states and 280 transitions. [2020-12-21 23:15:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 23:15:04,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-12-21 23:15:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:04,339 INFO L225 Difference]: With dead ends: 220 [2020-12-21 23:15:04,339 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 23:15:04,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:15:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 23:15:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2020-12-21 23:15:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-21 23:15:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2020-12-21 23:15:04,346 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 68 [2020-12-21 23:15:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:04,346 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2020-12-21 23:15:04,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 23:15:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2020-12-21 23:15:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 23:15:04,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:04,347 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:04,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 23:15:04,561 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -609805741, now seen corresponding path program 11 times [2020-12-21 23:15:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:04,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069833394] [2020-12-21 23:15:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069833394] [2020-12-21 23:15:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202340808] [2020-12-21 23:15:04,755 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 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 [2020-12-21 23:15:04,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-21 23:15:04,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 23:15:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:04,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:04,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 23:15:04,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591984783] [2020-12-21 23:15:04,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 23:15:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:04,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 23:15:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:15:04,933 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 16 states. [2020-12-21 23:15:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:05,074 INFO L93 Difference]: Finished difference Result 266 states and 337 transitions. [2020-12-21 23:15:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 23:15:05,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-21 23:15:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:05,077 INFO L225 Difference]: With dead ends: 266 [2020-12-21 23:15:05,077 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 23:15:05,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:15:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 23:15:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2020-12-21 23:15:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 23:15:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2020-12-21 23:15:05,089 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 69 [2020-12-21 23:15:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:05,090 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2020-12-21 23:15:05,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 23:15:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2020-12-21 23:15:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 23:15:05,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:05,091 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:05,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:05,304 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:05,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1147806676, now seen corresponding path program 12 times [2020-12-21 23:15:05,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:05,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675029743] [2020-12-21 23:15:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675029743] [2020-12-21 23:15:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497425716] [2020-12-21 23:15:05,575 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 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 [2020-12-21 23:15:06,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 23:15:06,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 23:15:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:06,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:06,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 23:15:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157087636] [2020-12-21 23:15:06,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 23:15:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 23:15:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:15:06,783 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand 17 states. [2020-12-21 23:15:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:07,355 INFO L93 Difference]: Finished difference Result 223 states and 283 transitions. [2020-12-21 23:15:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 23:15:07,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-12-21 23:15:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:07,357 INFO L225 Difference]: With dead ends: 223 [2020-12-21 23:15:07,358 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 23:15:07,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 17 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:15:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 23:15:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-12-21 23:15:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 23:15:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2020-12-21 23:15:07,364 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 71 [2020-12-21 23:15:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:07,365 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2020-12-21 23:15:07,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 23:15:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2020-12-21 23:15:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 23:15:07,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:07,366 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:07,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 23:15:07,571 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1296801274, now seen corresponding path program 12 times [2020-12-21 23:15:07,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:07,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894232276] [2020-12-21 23:15:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:07,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894232276] [2020-12-21 23:15:07,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645111446] [2020-12-21 23:15:07,744 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 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 [2020-12-21 23:15:08,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-21 23:15:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 23:15:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:08,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:08,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 23:15:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018842544] [2020-12-21 23:15:08,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 23:15:08,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:08,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 23:15:08,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:15:08,295 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand 17 states. [2020-12-21 23:15:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:08,396 INFO L93 Difference]: Finished difference Result 269 states and 340 transitions. [2020-12-21 23:15:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 23:15:08,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-12-21 23:15:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:08,398 INFO L225 Difference]: With dead ends: 269 [2020-12-21 23:15:08,398 INFO L226 Difference]: Without dead ends: 185 [2020-12-21 23:15:08,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:15:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-21 23:15:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2020-12-21 23:15:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-21 23:15:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2020-12-21 23:15:08,406 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 72 [2020-12-21 23:15:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:08,407 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2020-12-21 23:15:08,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 23:15:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2020-12-21 23:15:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 23:15:08,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:08,408 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:08,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:08,612 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -553887301, now seen corresponding path program 13 times [2020-12-21 23:15:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:08,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230626649] [2020-12-21 23:15:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230626649] [2020-12-21 23:15:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742470662] [2020-12-21 23:15:08,937 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 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 [2020-12-21 23:15:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 23:15:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:09,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:09,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 23:15:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108938629] [2020-12-21 23:15:09,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 23:15:09,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 23:15:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-21 23:15:09,442 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 18 states. [2020-12-21 23:15:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:10,043 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-12-21 23:15:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 23:15:10,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-12-21 23:15:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:10,045 INFO L225 Difference]: With dead ends: 226 [2020-12-21 23:15:10,045 INFO L226 Difference]: Without dead ends: 141 [2020-12-21 23:15:10,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-21 23:15:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-21 23:15:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-12-21 23:15:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 23:15:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2020-12-21 23:15:10,052 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 74 [2020-12-21 23:15:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:10,053 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-12-21 23:15:10,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 23:15:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2020-12-21 23:15:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 23:15:10,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:10,054 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:10,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 23:15:10,268 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 83895539, now seen corresponding path program 13 times [2020-12-21 23:15:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:10,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370419491] [2020-12-21 23:15:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370419491] [2020-12-21 23:15:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805823869] [2020-12-21 23:15:10,473 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 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 [2020-12-21 23:15:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 23:15:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 23:15:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592384628] [2020-12-21 23:15:10,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 23:15:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 23:15:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 23:15:10,638 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 18 states. [2020-12-21 23:15:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:10,753 INFO L93 Difference]: Finished difference Result 272 states and 343 transitions. [2020-12-21 23:15:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 23:15:10,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-12-21 23:15:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:10,755 INFO L225 Difference]: With dead ends: 272 [2020-12-21 23:15:10,755 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 23:15:10,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 23:15:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 23:15:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2020-12-21 23:15:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 23:15:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2020-12-21 23:15:10,764 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 75 [2020-12-21 23:15:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:10,764 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2020-12-21 23:15:10,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 23:15:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2020-12-21 23:15:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 23:15:10,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:10,765 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:10,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:10,978 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2074805876, now seen corresponding path program 14 times [2020-12-21 23:15:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:10,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712955777] [2020-12-21 23:15:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:11,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712955777] [2020-12-21 23:15:11,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854700349] [2020-12-21 23:15:11,291 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 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 [2020-12-21 23:15:11,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:15:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 23:15:11,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:11,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:11,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 23:15:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963804494] [2020-12-21 23:15:11,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 23:15:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 23:15:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:15:11,884 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand 19 states. [2020-12-21 23:15:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:12,381 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2020-12-21 23:15:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 23:15:12,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-12-21 23:15:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:12,388 INFO L225 Difference]: With dead ends: 229 [2020-12-21 23:15:12,389 INFO L226 Difference]: Without dead ends: 144 [2020-12-21 23:15:12,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:15:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-21 23:15:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2020-12-21 23:15:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-21 23:15:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2020-12-21 23:15:12,399 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 77 [2020-12-21 23:15:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:12,400 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2020-12-21 23:15:12,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 23:15:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2020-12-21 23:15:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-21 23:15:12,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:12,401 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:12,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 23:15:12,615 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -30994598, now seen corresponding path program 14 times [2020-12-21 23:15:12,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:12,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354640125] [2020-12-21 23:15:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:12,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354640125] [2020-12-21 23:15:12,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328098832] [2020-12-21 23:15:12,846 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 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 [2020-12-21 23:15:12,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:15:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 23:15:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:13,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:13,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 23:15:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425964447] [2020-12-21 23:15:13,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 23:15:13,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 23:15:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:15:13,083 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 19 states. [2020-12-21 23:15:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:13,200 INFO L93 Difference]: Finished difference Result 275 states and 346 transitions. [2020-12-21 23:15:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 23:15:13,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-12-21 23:15:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:13,202 INFO L225 Difference]: With dead ends: 275 [2020-12-21 23:15:13,203 INFO L226 Difference]: Without dead ends: 191 [2020-12-21 23:15:13,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:15:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-21 23:15:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 142. [2020-12-21 23:15:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 23:15:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2020-12-21 23:15:13,211 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 78 [2020-12-21 23:15:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:13,211 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2020-12-21 23:15:13,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 23:15:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2020-12-21 23:15:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 23:15:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:13,212 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:13,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 23:15:13,427 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash -960433381, now seen corresponding path program 15 times [2020-12-21 23:15:13,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:13,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491647500] [2020-12-21 23:15:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:13,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491647500] [2020-12-21 23:15:13,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437424216] [2020-12-21 23:15:13,801 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 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 [2020-12-21 23:15:14,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 23:15:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 23:15:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:14,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:14,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 23:15:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177201452] [2020-12-21 23:15:14,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 23:15:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 23:15:14,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-21 23:15:14,939 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand 20 states. [2020-12-21 23:15:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:15,663 INFO L93 Difference]: Finished difference Result 232 states and 292 transitions. [2020-12-21 23:15:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 23:15:15,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-12-21 23:15:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:15,668 INFO L225 Difference]: With dead ends: 232 [2020-12-21 23:15:15,668 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 23:15:15,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-21 23:15:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 23:15:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2020-12-21 23:15:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 23:15:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-21 23:15:15,678 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 80 [2020-12-21 23:15:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:15,678 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-21 23:15:15,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 23:15:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-21 23:15:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 23:15:15,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:15,680 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:15,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 23:15:15,885 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash 365868947, now seen corresponding path program 15 times [2020-12-21 23:15:15,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:15,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487141449] [2020-12-21 23:15:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:16,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487141449] [2020-12-21 23:15:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737972399] [2020-12-21 23:15:16,130 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 [2020-12-21 23:15:16,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-21 23:15:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:16,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 23:15:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:16,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:16,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 23:15:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211373166] [2020-12-21 23:15:16,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 23:15:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 23:15:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 23:15:16,805 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 20 states. [2020-12-21 23:15:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:16,951 INFO L93 Difference]: Finished difference Result 278 states and 349 transitions. [2020-12-21 23:15:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 23:15:16,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-12-21 23:15:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:16,953 INFO L225 Difference]: With dead ends: 278 [2020-12-21 23:15:16,953 INFO L226 Difference]: Without dead ends: 194 [2020-12-21 23:15:16,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 23:15:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-21 23:15:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2020-12-21 23:15:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 23:15:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-12-21 23:15:16,962 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 81 [2020-12-21 23:15:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:16,962 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-12-21 23:15:16,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 23:15:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-12-21 23:15:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 23:15:16,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:16,963 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:17,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 23:15:17,167 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1826655980, now seen corresponding path program 16 times [2020-12-21 23:15:17,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:17,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111747822] [2020-12-21 23:15:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:17,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111747822] [2020-12-21 23:15:17,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873198888] [2020-12-21 23:15:17,549 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 [2020-12-21 23:15:17,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:15:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 23:15:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:18,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:18,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 23:15:18,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625034895] [2020-12-21 23:15:18,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 23:15:18,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:18,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 23:15:18,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-21 23:15:18,155 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 21 states. [2020-12-21 23:15:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:18,953 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2020-12-21 23:15:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 23:15:18,954 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-12-21 23:15:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:18,955 INFO L225 Difference]: With dead ends: 235 [2020-12-21 23:15:18,956 INFO L226 Difference]: Without dead ends: 150 [2020-12-21 23:15:18,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-21 23:15:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-21 23:15:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-12-21 23:15:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 23:15:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2020-12-21 23:15:18,964 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 83 [2020-12-21 23:15:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:18,965 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2020-12-21 23:15:18,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 23:15:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2020-12-21 23:15:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 23:15:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:18,966 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:19,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:19,181 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash -717227846, now seen corresponding path program 16 times [2020-12-21 23:15:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:19,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780285027] [2020-12-21 23:15:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:19,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780285027] [2020-12-21 23:15:19,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306920164] [2020-12-21 23:15:19,443 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 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 [2020-12-21 23:15:19,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:15:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 23:15:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:19,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:19,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 23:15:19,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374290593] [2020-12-21 23:15:19,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 23:15:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 23:15:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 23:15:19,633 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand 21 states. [2020-12-21 23:15:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:19,777 INFO L93 Difference]: Finished difference Result 281 states and 352 transitions. [2020-12-21 23:15:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 23:15:19,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-12-21 23:15:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:19,779 INFO L225 Difference]: With dead ends: 281 [2020-12-21 23:15:19,779 INFO L226 Difference]: Without dead ends: 197 [2020-12-21 23:15:19,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 23:15:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-21 23:15:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 148. [2020-12-21 23:15:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-21 23:15:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2020-12-21 23:15:19,787 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 84 [2020-12-21 23:15:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:19,787 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2020-12-21 23:15:19,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 23:15:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2020-12-21 23:15:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 23:15:19,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:19,788 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:20,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 23:15:20,003 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash 994378875, now seen corresponding path program 17 times [2020-12-21 23:15:20,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:20,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865570749] [2020-12-21 23:15:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865570749] [2020-12-21 23:15:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179353830] [2020-12-21 23:15:20,422 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 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 [2020-12-21 23:15:20,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 23:15:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 23:15:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:21,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:21,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 23:15:21,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469372227] [2020-12-21 23:15:21,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 23:15:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 23:15:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-21 23:15:21,167 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand 22 states. [2020-12-21 23:15:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:22,227 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2020-12-21 23:15:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 23:15:22,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2020-12-21 23:15:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:22,229 INFO L225 Difference]: With dead ends: 238 [2020-12-21 23:15:22,229 INFO L226 Difference]: Without dead ends: 153 [2020-12-21 23:15:22,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-21 23:15:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-21 23:15:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2020-12-21 23:15:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-21 23:15:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 179 transitions. [2020-12-21 23:15:22,237 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 179 transitions. Word has length 86 [2020-12-21 23:15:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:22,237 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 179 transitions. [2020-12-21 23:15:22,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 23:15:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 179 transitions. [2020-12-21 23:15:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 23:15:22,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:22,238 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:22,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-21 23:15:22,453 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 835506739, now seen corresponding path program 17 times [2020-12-21 23:15:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:22,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815348717] [2020-12-21 23:15:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815348717] [2020-12-21 23:15:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858434121] [2020-12-21 23:15:22,762 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 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 [2020-12-21 23:15:22,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-21 23:15:22,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 23:15:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:22,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:22,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 23:15:22,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379608142] [2020-12-21 23:15:22,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 23:15:22,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 23:15:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 23:15:22,983 INFO L87 Difference]: Start difference. First operand 149 states and 179 transitions. Second operand 22 states. [2020-12-21 23:15:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:23,130 INFO L93 Difference]: Finished difference Result 284 states and 355 transitions. [2020-12-21 23:15:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 23:15:23,130 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-12-21 23:15:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:23,132 INFO L225 Difference]: With dead ends: 284 [2020-12-21 23:15:23,132 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 23:15:23,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 23:15:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 23:15:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2020-12-21 23:15:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 23:15:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2020-12-21 23:15:23,152 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 87 [2020-12-21 23:15:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2020-12-21 23:15:23,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 23:15:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2020-12-21 23:15:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 23:15:23,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:23,153 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:23,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:23,368 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1476303948, now seen corresponding path program 18 times [2020-12-21 23:15:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:23,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772821128] [2020-12-21 23:15:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772821128] [2020-12-21 23:15:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107851819] [2020-12-21 23:15:23,862 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 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 [2020-12-21 23:15:28,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 23:15:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 23:15:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:29,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:29,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 23:15:29,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137564103] [2020-12-21 23:15:29,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 23:15:29,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 23:15:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-21 23:15:29,761 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand 23 states. [2020-12-21 23:15:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:30,805 INFO L93 Difference]: Finished difference Result 241 states and 301 transitions. [2020-12-21 23:15:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 23:15:30,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2020-12-21 23:15:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:30,811 INFO L225 Difference]: With dead ends: 241 [2020-12-21 23:15:30,811 INFO L226 Difference]: Without dead ends: 156 [2020-12-21 23:15:30,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 23 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-21 23:15:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-21 23:15:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-12-21 23:15:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-21 23:15:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2020-12-21 23:15:30,818 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 89 [2020-12-21 23:15:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:30,819 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2020-12-21 23:15:30,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 23:15:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2020-12-21 23:15:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 23:15:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:30,820 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:31,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 23:15:31,024 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1553750554, now seen corresponding path program 18 times [2020-12-21 23:15:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:31,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508155567] [2020-12-21 23:15:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:31,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508155567] [2020-12-21 23:15:31,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150294360] [2020-12-21 23:15:31,346 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 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 [2020-12-21 23:15:31,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-21 23:15:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 23:15:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:31,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:31,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 23:15:31,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109190039] [2020-12-21 23:15:31,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 23:15:31,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 23:15:31,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 23:15:31,775 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand 23 states. [2020-12-21 23:15:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:31,942 INFO L93 Difference]: Finished difference Result 287 states and 358 transitions. [2020-12-21 23:15:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 23:15:31,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-12-21 23:15:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:31,944 INFO L225 Difference]: With dead ends: 287 [2020-12-21 23:15:31,944 INFO L226 Difference]: Without dead ends: 203 [2020-12-21 23:15:31,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 23:15:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-21 23:15:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 154. [2020-12-21 23:15:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-21 23:15:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2020-12-21 23:15:31,952 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 90 [2020-12-21 23:15:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:31,952 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2020-12-21 23:15:31,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 23:15:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2020-12-21 23:15:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-21 23:15:31,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:31,953 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:32,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:32,157 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1561234907, now seen corresponding path program 19 times [2020-12-21 23:15:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:32,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470111036] [2020-12-21 23:15:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:32,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470111036] [2020-12-21 23:15:32,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176142702] [2020-12-21 23:15:32,626 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 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 [2020-12-21 23:15:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 23:15:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:33,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:33,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 23:15:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085566605] [2020-12-21 23:15:33,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 23:15:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 23:15:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-21 23:15:33,451 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 24 states. [2020-12-21 23:15:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:34,281 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2020-12-21 23:15:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 23:15:34,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 92 [2020-12-21 23:15:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:34,283 INFO L225 Difference]: With dead ends: 244 [2020-12-21 23:15:34,283 INFO L226 Difference]: Without dead ends: 159 [2020-12-21 23:15:34,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 19 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-21 23:15:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-21 23:15:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-12-21 23:15:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 23:15:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2020-12-21 23:15:34,290 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 92 [2020-12-21 23:15:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:34,291 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2020-12-21 23:15:34,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 23:15:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2020-12-21 23:15:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 23:15:34,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:34,292 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:34,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 23:15:34,506 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1228174547, now seen corresponding path program 19 times [2020-12-21 23:15:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:34,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448629375] [2020-12-21 23:15:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:34,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448629375] [2020-12-21 23:15:34,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102852271] [2020-12-21 23:15:34,882 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 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 [2020-12-21 23:15:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 23:15:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:35,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:35,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 23:15:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772338773] [2020-12-21 23:15:35,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 23:15:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:35,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 23:15:35,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 23:15:35,070 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand 24 states. [2020-12-21 23:15:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:35,235 INFO L93 Difference]: Finished difference Result 290 states and 361 transitions. [2020-12-21 23:15:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 23:15:35,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-12-21 23:15:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:35,237 INFO L225 Difference]: With dead ends: 290 [2020-12-21 23:15:35,237 INFO L226 Difference]: Without dead ends: 206 [2020-12-21 23:15:35,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 23:15:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-21 23:15:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2020-12-21 23:15:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 23:15:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2020-12-21 23:15:35,246 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 93 [2020-12-21 23:15:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:35,246 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2020-12-21 23:15:35,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 23:15:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2020-12-21 23:15:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 23:15:35,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:35,248 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:35,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:35,461 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:35,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2079662508, now seen corresponding path program 20 times [2020-12-21 23:15:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:35,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703443348] [2020-12-21 23:15:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:35,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703443348] [2020-12-21 23:15:35,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989883150] [2020-12-21 23:15:35,970 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 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 [2020-12-21 23:15:36,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:15:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 23:15:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:36,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:36,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 23:15:36,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877609880] [2020-12-21 23:15:36,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 23:15:36,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:36,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 23:15:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-21 23:15:36,948 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 25 states. [2020-12-21 23:15:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:38,297 INFO L93 Difference]: Finished difference Result 247 states and 307 transitions. [2020-12-21 23:15:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 23:15:38,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-12-21 23:15:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:38,299 INFO L225 Difference]: With dead ends: 247 [2020-12-21 23:15:38,299 INFO L226 Difference]: Without dead ends: 162 [2020-12-21 23:15:38,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-21 23:15:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-21 23:15:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2020-12-21 23:15:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-21 23:15:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2020-12-21 23:15:38,307 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 95 [2020-12-21 23:15:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:38,307 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2020-12-21 23:15:38,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 23:15:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2020-12-21 23:15:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 23:15:38,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:38,308 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:38,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 23:15:38,523 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash 29504378, now seen corresponding path program 20 times [2020-12-21 23:15:38,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:38,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721268305] [2020-12-21 23:15:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:38,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721268305] [2020-12-21 23:15:38,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652155591] [2020-12-21 23:15:38,927 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 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 [2020-12-21 23:15:39,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:15:39,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 23:15:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:39,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:39,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 23:15:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137522054] [2020-12-21 23:15:39,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 23:15:39,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 23:15:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 23:15:39,155 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand 25 states. [2020-12-21 23:15:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:39,257 INFO L93 Difference]: Finished difference Result 293 states and 364 transitions. [2020-12-21 23:15:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 23:15:39,257 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-12-21 23:15:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:39,258 INFO L225 Difference]: With dead ends: 293 [2020-12-21 23:15:39,258 INFO L226 Difference]: Without dead ends: 209 [2020-12-21 23:15:39,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 23:15:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-21 23:15:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2020-12-21 23:15:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 23:15:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2020-12-21 23:15:39,270 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 96 [2020-12-21 23:15:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:39,270 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2020-12-21 23:15:39,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 23:15:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2020-12-21 23:15:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 23:15:39,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:39,271 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:39,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 23:15:39,485 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1344507707, now seen corresponding path program 21 times [2020-12-21 23:15:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954303158] [2020-12-21 23:15:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:40,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954303158] [2020-12-21 23:15:40,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514767276] [2020-12-21 23:15:40,009 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 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 [2020-12-21 23:15:40,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-21 23:15:40,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:15:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 23:15:40,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:15:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:41,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:15:41,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 23:15:41,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949546196] [2020-12-21 23:15:41,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 23:15:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:15:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 23:15:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-21 23:15:41,720 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand 26 states. [2020-12-21 23:15:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:15:43,054 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2020-12-21 23:15:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 23:15:43,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-12-21 23:15:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:15:43,056 INFO L225 Difference]: With dead ends: 250 [2020-12-21 23:15:43,056 INFO L226 Difference]: Without dead ends: 165 [2020-12-21 23:15:43,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 23 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-21 23:15:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-21 23:15:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-12-21 23:15:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-21 23:15:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2020-12-21 23:15:43,063 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 98 [2020-12-21 23:15:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:15:43,063 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2020-12-21 23:15:43,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 23:15:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2020-12-21 23:15:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 23:15:43,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:15:43,064 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:15:43,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:15:43,268 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:15:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:15:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1195401357, now seen corresponding path program 21 times [2020-12-21 23:15:43,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:15:43,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495984703] [2020-12-21 23:15:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:15:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:15:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:15:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495984703] [2020-12-21 23:15:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468084292] [2020-12-21 23:15:43,677 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 [2020-12-21 23:16:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-21 23:16:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:16:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 23:16:53,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:16:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:16:54,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:16:54,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 23:16:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933383164] [2020-12-21 23:16:54,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 23:16:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:16:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 23:16:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 23:16:54,098 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 26 states. [2020-12-21 23:16:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:16:54,289 INFO L93 Difference]: Finished difference Result 296 states and 367 transitions. [2020-12-21 23:16:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 23:16:54,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-12-21 23:16:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:16:54,293 INFO L225 Difference]: With dead ends: 296 [2020-12-21 23:16:54,293 INFO L226 Difference]: Without dead ends: 212 [2020-12-21 23:16:54,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 23:16:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-21 23:16:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 163. [2020-12-21 23:16:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-21 23:16:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2020-12-21 23:16:54,303 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 99 [2020-12-21 23:16:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:16:54,304 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2020-12-21 23:16:54,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 23:16:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2020-12-21 23:16:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 23:16:54,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:16:54,305 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:16:54,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-21 23:16:54,514 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:16:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:16:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1031135476, now seen corresponding path program 22 times [2020-12-21 23:16:54,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:16:54,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936647362] [2020-12-21 23:16:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:16:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:16:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:16:55,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936647362] [2020-12-21 23:16:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019476758] [2020-12-21 23:16:55,112 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 [2020-12-21 23:16:55,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:16:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:16:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 23:16:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:16:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:16:56,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:16:56,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 23:16:56,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794762568] [2020-12-21 23:16:56,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 23:16:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:16:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 23:16:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-21 23:16:56,268 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand 27 states. [2020-12-21 23:16:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:16:57,738 INFO L93 Difference]: Finished difference Result 253 states and 313 transitions. [2020-12-21 23:16:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 23:16:57,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-12-21 23:16:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:16:57,740 INFO L225 Difference]: With dead ends: 253 [2020-12-21 23:16:57,740 INFO L226 Difference]: Without dead ends: 168 [2020-12-21 23:16:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-21 23:16:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-21 23:16:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2020-12-21 23:16:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 23:16:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2020-12-21 23:16:57,748 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 101 [2020-12-21 23:16:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:16:57,748 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2020-12-21 23:16:57,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 23:16:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2020-12-21 23:16:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-21 23:16:57,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:16:57,749 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:16:57,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:16:57,963 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:16:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:16:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1974961370, now seen corresponding path program 22 times [2020-12-21 23:16:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:16:57,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076198518] [2020-12-21 23:16:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:16:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:16:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:16:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076198518] [2020-12-21 23:16:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290552277] [2020-12-21 23:16:58,460 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 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 [2020-12-21 23:16:58,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:16:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:16:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 23:16:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:16:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:16:58,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:16:58,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 23:16:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018302368] [2020-12-21 23:16:58,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 23:16:58,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:16:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 23:16:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 23:16:58,674 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand 27 states. [2020-12-21 23:16:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:16:58,789 INFO L93 Difference]: Finished difference Result 299 states and 370 transitions. [2020-12-21 23:16:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 23:16:58,790 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-12-21 23:16:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:16:58,791 INFO L225 Difference]: With dead ends: 299 [2020-12-21 23:16:58,791 INFO L226 Difference]: Without dead ends: 215 [2020-12-21 23:16:58,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 23:16:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-21 23:16:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 166. [2020-12-21 23:16:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-21 23:16:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 196 transitions. [2020-12-21 23:16:58,800 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 196 transitions. Word has length 102 [2020-12-21 23:16:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:16:58,800 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 196 transitions. [2020-12-21 23:16:58,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 23:16:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 196 transitions. [2020-12-21 23:16:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 23:16:58,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:16:58,802 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:16:59,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:16:59,016 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:16:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:16:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1677064037, now seen corresponding path program 23 times [2020-12-21 23:16:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:16:59,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001192884] [2020-12-21 23:16:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:16:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:16:59,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:16:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:16:59,139 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:16:59,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 23:16:59,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 23:16:59,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-12-21 23:16:59,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:16:59 BoogieIcfgContainer [2020-12-21 23:16:59,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 23:16:59,300 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 23:16:59,300 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 23:16:59,301 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 23:16:59,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:40" (3/4) ... [2020-12-21 23:16:59,307 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-21 23:16:59,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 23:16:59,309 INFO L168 Benchmark]: Toolchain (without parser) took 140528.06 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 130.2 MB in the beginning and 261.7 MB in the end (delta: -131.5 MB). Peak memory consumption was 37.6 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,310 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory was 134.9 MB in the beginning and 134.8 MB in the end (delta: 95.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:16:59,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.75 ms. Allocated memory is still 154.1 MB. Free memory was 130.0 MB in the beginning and 117.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,311 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.82 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 115.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,311 INFO L168 Benchmark]: Boogie Preprocessor took 85.81 ms. Allocated memory is still 154.1 MB. Free memory was 115.5 MB in the beginning and 113.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,312 INFO L168 Benchmark]: RCFGBuilder took 947.10 ms. Allocated memory is still 154.1 MB. Free memory was 113.8 MB in the beginning and 127.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,312 INFO L168 Benchmark]: TraceAbstraction took 139070.49 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 127.7 MB in the beginning and 262.2 MB in the end (delta: -134.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 8.0 GB. [2020-12-21 23:16:59,313 INFO L168 Benchmark]: Witness Printer took 6.74 ms. Allocated memory is still 323.0 MB. Free memory was 262.2 MB in the beginning and 261.7 MB in the end (delta: 517.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:16:59,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory was 134.9 MB in the beginning and 134.8 MB in the end (delta: 95.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.75 ms. Allocated memory is still 154.1 MB. Free memory was 130.0 MB in the beginning and 117.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 71.82 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 115.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.81 ms. Allocated memory is still 154.1 MB. Free memory was 115.5 MB in the beginning and 113.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 947.10 ms. Allocated memory is still 154.1 MB. Free memory was 113.8 MB in the beginning and 127.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 139070.49 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 127.7 MB in the beginning and 262.2 MB in the end (delta: -134.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 8.0 GB. * Witness Printer took 6.74 ms. Allocated memory is still 323.0 MB. Free memory was 262.2 MB in the beginning and 261.7 MB in the end (delta: 517.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 69, overapproximation of bitwiseAnd at line 68. Possible FailurePath: [L213] unsigned int a ; [L214] unsigned int ma = __VERIFIER_nondet_uint(); [L215] signed char ea = __VERIFIER_nondet_char(); [L216] unsigned int b ; [L217] unsigned int mb = __VERIFIER_nondet_uint(); [L218] signed char eb = __VERIFIER_nondet_char(); [L219] unsigned int r_mul ; [L220] unsigned int zero ; [L221] unsigned int one ; [L222] int sb ; [L223] int tmp ; [L224] int tmp___0 ; [L225] int tmp___1 ; [L226] int __retres16 ; [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND TRUE ! m [L22] __retres4 = 0U [L72] return (__retres4); [L230] zero = base2flt(0, 0) [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND FALSE !(! m) [L27] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND FALSE !(m < 1U << 24U) [L68] m = m & ~ (1U << 24U) [L69] res = m | ((unsigned int )(e + 128) << 24U) [L70] __retres4 = res [L72] return (__retres4); [L231] one = base2flt(1, 0) [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND FALSE !(! m) [L27] COND FALSE !(m < 1U << 24U) [L49] COND TRUE 1 [L51] COND FALSE !(m >= 1U << 25U) [L68] m = m & ~ (1U << 24U) [L69] res = m | ((unsigned int )(e + 128) << 24U) [L70] __retres4 = res [L72] return (__retres4); [L232] a = base2flt(ma, ea) [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND TRUE ! m [L22] __retres4 = 0U [L72] return (__retres4); [L233] b = base2flt(mb, eb) [L140] unsigned int res ; [L141] unsigned int ma ; [L142] unsigned int mb ; [L143] unsigned long long accu ; [L144] int ea ; [L145] int eb ; [L146] unsigned int tmp ; [L147] unsigned int __retres10 ; [L150] COND FALSE !(a < b) [L157] COND TRUE ! b [L158] __retres10 = 0U [L209] return (__retres10); [L234] r_mul = mulflt(a, b) [L236] COND FALSE !(b < one) [L239] COND FALSE !(b > one) [L242] tmp = 0 [L244] sb = tmp [L246] COND TRUE sb == 0 [L247] COND TRUE r_mul < a [L248] tmp___1 = -1 [L8] COND TRUE !(cond) [L9] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 138.9s, OverallIterations: 55, TraceHistogramMax: 24, AutomataDifference: 17.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5097 SDtfs, 2463 SDslu, 32262 SDs, 0 SdLazy, 20412 SolverSat, 482 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3907 GetRequests, 2950 SyntacticMatches, 271 SemanticMatches, 686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 54 MinimizatonAttempts, 1265 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 84.6s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 6708 NumberOfCodeBlocks, 6708 NumberOfCodeBlocksAsserted, 363 NumberOfCheckSat, 6502 ConstructedInterpolants, 0 QuantifiedInterpolants, 1800874 SizeOfPredicates, 84 NumberOfNonLiveVariables, 10864 ConjunctsInSsa, 1063 ConjunctsInUnsatCore, 102 InterpolantComputations, 9 PerfectInterpolantSequences, 12/25413 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...