/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/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:35:27,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:35:27,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:35:27,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:35:27,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:35:27,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:35:27,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:35:27,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:35:27,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:35:27,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:35:27,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:35:27,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:35:27,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:35:27,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:35:27,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:35:27,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:35:27,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:35:27,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:35:27,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:35:27,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:35:27,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:35:27,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:35:27,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:35:27,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:35:27,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:35:27,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:35:27,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:35:27,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:35:27,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:35:27,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:35:27,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:35:27,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:35:27,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:35:27,258 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:35:27,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:35:27,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:35:27,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:35:27,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:35:27,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:35:27,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:35:27,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:35:27,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:35:27,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:35:27,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:35:27,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:35:27,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:35:27,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:35:27,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:35:27,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:35:27,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:35:27,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:35:27,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:35:27,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:35:27,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:35:27,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:35:27,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:35:27,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:35:27,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:35:27,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:35:27,728 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:35:27,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2020-12-22 04:35:27,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea04241/41c478e2850a4983a0e09f133b3fb066/FLAG6fbe66f71 [2020-12-22 04:35:28,374 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:35:28,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2020-12-22 04:35:28,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea04241/41c478e2850a4983a0e09f133b3fb066/FLAG6fbe66f71 [2020-12-22 04:35:28,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea04241/41c478e2850a4983a0e09f133b3fb066 [2020-12-22 04:35:28,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:35:28,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:35:28,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:28,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:35:28,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:35:28,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:28" (1/1) ... [2020-12-22 04:35:28,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a078b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:28, skipping insertion in model container [2020-12-22 04:35:28,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:28" (1/1) ... [2020-12-22 04:35:28,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:35:28,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:35:29,028 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/loop-industry-pattern/nested-3.c[404,417] [2020-12-22 04:35:29,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:29,058 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:35:29,071 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/loop-industry-pattern/nested-3.c[404,417] [2020-12-22 04:35:29,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:29,090 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:35:29,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29 WrapperNode [2020-12-22 04:35:29,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:29,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:29,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:35:29,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:35:29,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:29,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:35:29,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:35:29,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:35:29,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... [2020-12-22 04:35:29,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:35:29,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:35:29,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:35:29,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:35:29,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:35:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:35:29,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:35:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:35:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:35:29,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:35:29,459 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:35:29,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:29 BoogieIcfgContainer [2020-12-22 04:35:29,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:35:29,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:35:29,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:35:29,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:35:29,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:35:28" (1/3) ... [2020-12-22 04:35:29,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b1df96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:29, skipping insertion in model container [2020-12-22 04:35:29,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:29" (2/3) ... [2020-12-22 04:35:29,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b1df96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:29, skipping insertion in model container [2020-12-22 04:35:29,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:29" (3/3) ... [2020-12-22 04:35:29,471 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2020-12-22 04:35:29,478 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:35:29,482 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:35:29,513 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:35:29,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:35:29,607 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:35:29,607 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:35:29,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:35:29,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:35:29,613 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:35:29,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:35:29,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:35:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-22 04:35:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:35:29,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:29,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:29,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:29,675 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2020-12-22 04:35:29,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:29,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133890942] [2020-12-22 04:35:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:30,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133890942] [2020-12-22 04:35:30,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:30,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:35:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751578638] [2020-12-22 04:35:30,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:30,089 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-22 04:35:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:30,173 INFO L93 Difference]: Finished difference Result 29 states and 49 transitions. [2020-12-22 04:35:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:30,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:35:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:30,184 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:35:30,185 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:35:30,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:35:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2020-12-22 04:35:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:35:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2020-12-22 04:35:30,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2020-12-22 04:35:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:30,221 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-12-22 04:35:30,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2020-12-22 04:35:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:35:30,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:30,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:30,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:35:30,223 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2020-12-22 04:35:30,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:30,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332496429] [2020-12-22 04:35:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:30,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332496429] [2020-12-22 04:35:30,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891103162] [2020-12-22 04:35:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 04:35:30,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:30,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:30,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 04:35:30,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513051400] [2020-12-22 04:35:30,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:30,378 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 3 states. [2020-12-22 04:35:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:30,405 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-12-22 04:35:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:30,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:35:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:30,407 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:35:30,407 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:35:30,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:35:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2020-12-22 04:35:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:35:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2020-12-22 04:35:30,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2020-12-22 04:35:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:30,412 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2020-12-22 04:35:30,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2020-12-22 04:35:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:35:30,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:30,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:30,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:35:30,617 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2020-12-22 04:35:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:30,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512484252] [2020-12-22 04:35:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:30,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512484252] [2020-12-22 04:35:30,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562932131] [2020-12-22 04:35:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:35:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:30,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:30,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:35:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425336068] [2020-12-22 04:35:30,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:35:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:35:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:30,795 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 5 states. [2020-12-22 04:35:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:30,836 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-22 04:35:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:35:30,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 04:35:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:30,838 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:35:30,838 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:35:30,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:35:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-22 04:35:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:35:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-12-22 04:35:30,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2020-12-22 04:35:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:30,844 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-12-22 04:35:30,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:35:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-12-22 04:35:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:35:30,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:30,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:31,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:31,059 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2128812571, now seen corresponding path program 2 times [2020-12-22 04:35:31,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:31,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445904082] [2020-12-22 04:35:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:31,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445904082] [2020-12-22 04:35:31,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991053289] [2020-12-22 04:35:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:31,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:35:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:35:31,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:31,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:35:31,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431752677] [2020-12-22 04:35:31,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:35:31,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:35:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:35:31,245 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 8 states. [2020-12-22 04:35:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:31,388 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-12-22 04:35:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:35:31,388 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-22 04:35:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:31,404 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:35:31,404 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:35:31,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:35:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:35:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-22 04:35:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:35:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-12-22 04:35:31,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 15 [2020-12-22 04:35:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:31,414 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-12-22 04:35:31,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:35:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-12-22 04:35:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:35:31,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:31,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:31,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:31,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 25548196, now seen corresponding path program 1 times [2020-12-22 04:35:31,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992632748] [2020-12-22 04:35:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992632748] [2020-12-22 04:35:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096484853] [2020-12-22 04:35:31,703 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 [2020-12-22 04:35:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:35:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:31,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:31,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:35:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874583797] [2020-12-22 04:35:31,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:35:31,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:35:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:31,787 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 7 states. [2020-12-22 04:35:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:31,846 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2020-12-22 04:35:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:35:31,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 04:35:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:31,848 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:35:31,848 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:35:31,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:35:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2020-12-22 04:35:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:35:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2020-12-22 04:35:31,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 18 [2020-12-22 04:35:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:31,858 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2020-12-22 04:35:31,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:35:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2020-12-22 04:35:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:35:31,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:31,860 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:32,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:32,074 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2073833213, now seen corresponding path program 2 times [2020-12-22 04:35:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:32,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765543299] [2020-12-22 04:35:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765543299] [2020-12-22 04:35:32,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650719245] [2020-12-22 04:35:32,189 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:32,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:32,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:35:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 04:35:32,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:32,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-22 04:35:32,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306289321] [2020-12-22 04:35:32,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:35:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:35:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:32,274 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand 4 states. [2020-12-22 04:35:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:32,311 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2020-12-22 04:35:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:35:32,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-22 04:35:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:32,313 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:35:32,313 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:35:32,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:35:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-12-22 04:35:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:35:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-12-22 04:35:32,328 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 21 [2020-12-22 04:35:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:32,328 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-12-22 04:35:32,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:35:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-12-22 04:35:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:35:32,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:32,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:32,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:35:32,545 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 3 times [2020-12-22 04:35:32,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:32,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522929953] [2020-12-22 04:35:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:32,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522929953] [2020-12-22 04:35:32,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412929500] [2020-12-22 04:35:32,649 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:32,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:35:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:35:32,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:32,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:35:32,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:32,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2020-12-22 04:35:32,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128827564] [2020-12-22 04:35:32,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:35:32,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:35:32,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:32,870 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 8 states. [2020-12-22 04:35:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:32,972 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2020-12-22 04:35:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:35:32,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-22 04:35:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:32,978 INFO L225 Difference]: With dead ends: 161 [2020-12-22 04:35:32,978 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 04:35:32,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:35:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 04:35:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-12-22 04:35:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:35:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2020-12-22 04:35:32,998 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 21 [2020-12-22 04:35:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:33,001 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2020-12-22 04:35:33,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:35:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2020-12-22 04:35:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:35:33,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:33,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:33,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:33,205 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash 483638269, now seen corresponding path program 1 times [2020-12-22 04:35:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:33,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399835736] [2020-12-22 04:35:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:33,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399835736] [2020-12-22 04:35:33,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61016598] [2020-12-22 04:35:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:35:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:33,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:33,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:35:33,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142788613] [2020-12-22 04:35:33,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:35:33,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:33,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:35:33,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:35:33,371 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand 8 states. [2020-12-22 04:35:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:33,443 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2020-12-22 04:35:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:35:33,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-22 04:35:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:33,445 INFO L225 Difference]: With dead ends: 223 [2020-12-22 04:35:33,445 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 04:35:33,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:35:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 04:35:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-12-22 04:35:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 04:35:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2020-12-22 04:35:33,463 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 21 [2020-12-22 04:35:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:33,464 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2020-12-22 04:35:33,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:35:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2020-12-22 04:35:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:35:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:33,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:33,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:33,681 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2101787646, now seen corresponding path program 2 times [2020-12-22 04:35:33,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:33,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078121090] [2020-12-22 04:35:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078121090] [2020-12-22 04:35:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436055280] [2020-12-22 04:35:33,794 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 [2020-12-22 04:35:33,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:35:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 04:35:33,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:33,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-12-22 04:35:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228443699] [2020-12-22 04:35:33,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:35:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:35:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:33,904 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 11 states. [2020-12-22 04:35:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:34,070 INFO L93 Difference]: Finished difference Result 324 states and 408 transitions. [2020-12-22 04:35:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:35:34,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:35:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:34,072 INFO L225 Difference]: With dead ends: 324 [2020-12-22 04:35:34,073 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 04:35:34,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 04:35:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 140. [2020-12-22 04:35:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-22 04:35:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-12-22 04:35:34,093 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 24 [2020-12-22 04:35:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:34,093 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-12-22 04:35:34,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:35:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-12-22 04:35:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:35:34,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:34,095 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:34,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:35:34,309 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1847320295, now seen corresponding path program 3 times [2020-12-22 04:35:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:34,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345128168] [2020-12-22 04:35:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:34,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345128168] [2020-12-22 04:35:34,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337535322] [2020-12-22 04:35:34,385 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 [2020-12-22 04:35:34,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:35:34,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:35:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 04:35:34,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:34,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-12-22 04:35:34,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006830990] [2020-12-22 04:35:34,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:35:34,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:35:34,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:34,494 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 4 states. [2020-12-22 04:35:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:34,558 INFO L93 Difference]: Finished difference Result 265 states and 321 transitions. [2020-12-22 04:35:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:35:34,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-22 04:35:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:34,560 INFO L225 Difference]: With dead ends: 265 [2020-12-22 04:35:34,560 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 04:35:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:35:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 04:35:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2020-12-22 04:35:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 04:35:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2020-12-22 04:35:34,577 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 27 [2020-12-22 04:35:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:34,578 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2020-12-22 04:35:34,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:35:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2020-12-22 04:35:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:35:34,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:34,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:34,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:34,795 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1668645725, now seen corresponding path program 4 times [2020-12-22 04:35:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956539104] [2020-12-22 04:35:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956539104] [2020-12-22 04:35:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364987831] [2020-12-22 04:35:34,915 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:34,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:34,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:35:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:35,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:35,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:35:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663079639] [2020-12-22 04:35:35,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:35:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:35,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:35:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:35,024 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand 10 states. [2020-12-22 04:35:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:35,115 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2020-12-22 04:35:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:35:35,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-22 04:35:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:35,118 INFO L225 Difference]: With dead ends: 325 [2020-12-22 04:35:35,118 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 04:35:35,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 04:35:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2020-12-22 04:35:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 04:35:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2020-12-22 04:35:35,135 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 27 [2020-12-22 04:35:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:35,135 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2020-12-22 04:35:35,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:35:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2020-12-22 04:35:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:35:35,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:35,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:35,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:35,351 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1538147426, now seen corresponding path program 5 times [2020-12-22 04:35:35,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:35,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187544431] [2020-12-22 04:35:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:35,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187544431] [2020-12-22 04:35:35,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710192528] [2020-12-22 04:35:35,439 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:35,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 04:35:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:35:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:35,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:35,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:35:35,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705167878] [2020-12-22 04:35:35,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:35:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:35:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:35,543 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand 11 states. [2020-12-22 04:35:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:35,662 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2020-12-22 04:35:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:35:35,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-12-22 04:35:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:35,665 INFO L225 Difference]: With dead ends: 358 [2020-12-22 04:35:35,665 INFO L226 Difference]: Without dead ends: 252 [2020-12-22 04:35:35,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-22 04:35:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 188. [2020-12-22 04:35:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 04:35:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2020-12-22 04:35:35,681 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 30 [2020-12-22 04:35:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:35,681 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2020-12-22 04:35:35,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:35:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2020-12-22 04:35:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:35:35,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:35,683 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:35,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:35:35,898 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 808724797, now seen corresponding path program 6 times [2020-12-22 04:35:35,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:35,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080269877] [2020-12-22 04:35:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:35,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080269877] [2020-12-22 04:35:35,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631180513] [2020-12-22 04:35:35,998 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:36,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:35:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:35:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:36,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 04:35:36,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:36,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2020-12-22 04:35:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861666474] [2020-12-22 04:35:36,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:35:36,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:35:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:36,228 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand 8 states. [2020-12-22 04:35:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:36,362 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2020-12-22 04:35:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:35:36,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-12-22 04:35:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:36,365 INFO L225 Difference]: With dead ends: 270 [2020-12-22 04:35:36,365 INFO L226 Difference]: Without dead ends: 268 [2020-12-22 04:35:36,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:35:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-22 04:35:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 188. [2020-12-22 04:35:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 04:35:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2020-12-22 04:35:36,380 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 33 [2020-12-22 04:35:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:36,380 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2020-12-22 04:35:36,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:35:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2020-12-22 04:35:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:35:36,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:36,382 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:36,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:35:36,596 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1165631, now seen corresponding path program 1 times [2020-12-22 04:35:36,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:36,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608760168] [2020-12-22 04:35:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 04:35:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608760168] [2020-12-22 04:35:36,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:35:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97030208] [2020-12-22 04:35:36,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:36,634 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand 3 states. [2020-12-22 04:35:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:36,654 INFO L93 Difference]: Finished difference Result 307 states and 370 transitions. [2020-12-22 04:35:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:36,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-22 04:35:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:36,656 INFO L225 Difference]: With dead ends: 307 [2020-12-22 04:35:36,656 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 04:35:36,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 04:35:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-12-22 04:35:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 04:35:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2020-12-22 04:35:36,670 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 33 [2020-12-22 04:35:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:36,671 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2020-12-22 04:35:36,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2020-12-22 04:35:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:35:36,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:36,673 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:36,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 04:35:36,673 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1043308475, now seen corresponding path program 1 times [2020-12-22 04:35:36,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:36,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087486138] [2020-12-22 04:35:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-22 04:35:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087486138] [2020-12-22 04:35:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140057707] [2020-12-22 04:35:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:35:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-22 04:35:36,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:36,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:35:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201322305] [2020-12-22 04:35:36,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:35:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:35:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:35:36,955 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 12 states. [2020-12-22 04:35:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:37,042 INFO L93 Difference]: Finished difference Result 383 states and 458 transitions. [2020-12-22 04:35:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:35:37,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-22 04:35:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:37,045 INFO L225 Difference]: With dead ends: 383 [2020-12-22 04:35:37,045 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 04:35:37,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:35:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 04:35:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-12-22 04:35:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-22 04:35:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2020-12-22 04:35:37,062 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 63 [2020-12-22 04:35:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:37,063 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2020-12-22 04:35:37,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:35:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2020-12-22 04:35:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:35:37,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:37,065 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:37,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:35:37,280 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -305796463, now seen corresponding path program 2 times [2020-12-22 04:35:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:37,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586997781] [2020-12-22 04:35:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:35:37,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586997781] [2020-12-22 04:35:37,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309064002] [2020-12-22 04:35:37,396 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:37,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:37,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:35:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:35:37,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:37,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:35:37,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589791982] [2020-12-22 04:35:37,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:35:37,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:35:37,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:37,530 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand 13 states. [2020-12-22 04:35:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:37,665 INFO L93 Difference]: Finished difference Result 416 states and 496 transitions. [2020-12-22 04:35:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:35:37,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-12-22 04:35:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:37,668 INFO L225 Difference]: With dead ends: 416 [2020-12-22 04:35:37,668 INFO L226 Difference]: Without dead ends: 290 [2020-12-22 04:35:37,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-22 04:35:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2020-12-22 04:35:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 04:35:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2020-12-22 04:35:37,685 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 69 [2020-12-22 04:35:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:37,686 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2020-12-22 04:35:37,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:35:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2020-12-22 04:35:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 04:35:37,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:37,688 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:37,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:37,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash 721559429, now seen corresponding path program 3 times [2020-12-22 04:35:37,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:37,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244269297] [2020-12-22 04:35:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-12-22 04:35:38,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244269297] [2020-12-22 04:35:38,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832711774] [2020-12-22 04:35:38,092 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:38,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:35:38,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:35:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:38,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 326 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-12-22 04:35:38,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:38,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 04:35:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919160410] [2020-12-22 04:35:38,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:35:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:35:38,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:35:38,391 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand 20 states. [2020-12-22 04:35:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:39,322 INFO L93 Difference]: Finished difference Result 847 states and 1009 transitions. [2020-12-22 04:35:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:35:39,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-12-22 04:35:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:39,326 INFO L225 Difference]: With dead ends: 847 [2020-12-22 04:35:39,326 INFO L226 Difference]: Without dead ends: 709 [2020-12-22 04:35:39,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=2277, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:35:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-12-22 04:35:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 398. [2020-12-22 04:35:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-12-22 04:35:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 473 transitions. [2020-12-22 04:35:39,378 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 473 transitions. Word has length 75 [2020-12-22 04:35:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:39,378 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 473 transitions. [2020-12-22 04:35:39,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:35:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 473 transitions. [2020-12-22 04:35:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 04:35:39,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:39,380 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:39,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:35:39,594 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1200974189, now seen corresponding path program 1 times [2020-12-22 04:35:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025205505] [2020-12-22 04:35:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 390 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-22 04:35:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025205505] [2020-12-22 04:35:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647541259] [2020-12-22 04:35:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:35:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-22 04:35:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:39,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:35:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590083999] [2020-12-22 04:35:39,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:35:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:35:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:35:39,887 INFO L87 Difference]: Start difference. First operand 398 states and 473 transitions. Second operand 15 states. [2020-12-22 04:35:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:40,024 INFO L93 Difference]: Finished difference Result 826 states and 978 transitions. [2020-12-22 04:35:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:35:40,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-12-22 04:35:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:40,028 INFO L225 Difference]: With dead ends: 826 [2020-12-22 04:35:40,028 INFO L226 Difference]: Without dead ends: 525 [2020-12-22 04:35:40,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:35:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-12-22 04:35:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 419. [2020-12-22 04:35:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-12-22 04:35:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 497 transitions. [2020-12-22 04:35:40,062 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 497 transitions. Word has length 81 [2020-12-22 04:35:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:40,062 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 497 transitions. [2020-12-22 04:35:40,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:35:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 497 transitions. [2020-12-22 04:35:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 04:35:40,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:40,067 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:40,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:35:40,283 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1904992903, now seen corresponding path program 2 times [2020-12-22 04:35:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:40,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241456912] [2020-12-22 04:35:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-12-22 04:35:40,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241456912] [2020-12-22 04:35:40,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706882342] [2020-12-22 04:35:40,486 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:40,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:40,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:35:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 5 proven. 183 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2020-12-22 04:35:40,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:40,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 18 [2020-12-22 04:35:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755770444] [2020-12-22 04:35:40,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:35:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:35:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:35:40,670 INFO L87 Difference]: Start difference. First operand 419 states and 497 transitions. Second operand 18 states. [2020-12-22 04:35:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:41,054 INFO L93 Difference]: Finished difference Result 1441 states and 1671 transitions. [2020-12-22 04:35:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:35:41,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-12-22 04:35:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:41,060 INFO L225 Difference]: With dead ends: 1441 [2020-12-22 04:35:41,060 INFO L226 Difference]: Without dead ends: 1128 [2020-12-22 04:35:41,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:35:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-12-22 04:35:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 443. [2020-12-22 04:35:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 04:35:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 526 transitions. [2020-12-22 04:35:41,131 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 526 transitions. Word has length 87 [2020-12-22 04:35:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:41,132 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 526 transitions. [2020-12-22 04:35:41,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:35:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 526 transitions. [2020-12-22 04:35:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 04:35:41,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:41,133 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:41,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:41,347 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash 900910931, now seen corresponding path program 3 times [2020-12-22 04:35:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:41,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199006520] [2020-12-22 04:35:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-22 04:35:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199006520] [2020-12-22 04:35:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147990235] [2020-12-22 04:35:41,548 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:41,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:35:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:35:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:41,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 37 proven. 539 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-22 04:35:41,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:41,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-12-22 04:35:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401483214] [2020-12-22 04:35:41,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:35:41,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:35:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:35:41,869 INFO L87 Difference]: Start difference. First operand 443 states and 526 transitions. Second operand 23 states. [2020-12-22 04:35:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:43,882 INFO L93 Difference]: Finished difference Result 1399 states and 1602 transitions. [2020-12-22 04:35:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:35:43,882 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-12-22 04:35:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:43,887 INFO L225 Difference]: With dead ends: 1399 [2020-12-22 04:35:43,887 INFO L226 Difference]: Without dead ends: 1068 [2020-12-22 04:35:43,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1260, Invalid=5220, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:35:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-22 04:35:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 488. [2020-12-22 04:35:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-12-22 04:35:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 578 transitions. [2020-12-22 04:35:43,956 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 578 transitions. Word has length 93 [2020-12-22 04:35:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:43,956 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 578 transitions. [2020-12-22 04:35:43,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:35:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 578 transitions. [2020-12-22 04:35:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 04:35:43,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:43,958 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:44,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:44,173 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1378183737, now seen corresponding path program 4 times [2020-12-22 04:35:44,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:44,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737878255] [2020-12-22 04:35:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 621 proven. 287 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 04:35:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737878255] [2020-12-22 04:35:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25941443] [2020-12-22 04:35:44,372 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:44,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:35:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 881 proven. 55 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 04:35:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:44,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-12-22 04:35:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509997422] [2020-12-22 04:35:44,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:35:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:35:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:35:44,825 INFO L87 Difference]: Start difference. First operand 488 states and 578 transitions. Second operand 33 states. [2020-12-22 04:35:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,163 INFO L93 Difference]: Finished difference Result 1518 states and 1756 transitions. [2020-12-22 04:35:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:35:46,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-12-22 04:35:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,168 INFO L225 Difference]: With dead ends: 1518 [2020-12-22 04:35:46,168 INFO L226 Difference]: Without dead ends: 1151 [2020-12-22 04:35:46,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=847, Invalid=3059, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:35:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2020-12-22 04:35:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 749. [2020-12-22 04:35:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-12-22 04:35:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 858 transitions. [2020-12-22 04:35:46,258 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 858 transitions. Word has length 99 [2020-12-22 04:35:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,259 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 858 transitions. [2020-12-22 04:35:46,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:35:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 858 transitions. [2020-12-22 04:35:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 04:35:46,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,261 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,474 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 198529999, now seen corresponding path program 5 times [2020-12-22 04:35:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296302020] [2020-12-22 04:35:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 04:35:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296302020] [2020-12-22 04:35:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533549150] [2020-12-22 04:35:46,673 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:35:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:35:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 04:35:46,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:46,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:35:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851085075] [2020-12-22 04:35:46,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:35:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:35:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:35:46,837 INFO L87 Difference]: Start difference. First operand 749 states and 858 transitions. Second operand 19 states. [2020-12-22 04:35:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:47,144 INFO L93 Difference]: Finished difference Result 1843 states and 2077 transitions. [2020-12-22 04:35:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:35:47,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2020-12-22 04:35:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:47,151 INFO L225 Difference]: With dead ends: 1843 [2020-12-22 04:35:47,151 INFO L226 Difference]: Without dead ends: 1229 [2020-12-22 04:35:47,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:35:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-12-22 04:35:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 800. [2020-12-22 04:35:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-12-22 04:35:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 917 transitions. [2020-12-22 04:35:47,242 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 917 transitions. Word has length 105 [2020-12-22 04:35:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:47,242 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 917 transitions. [2020-12-22 04:35:47,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:35:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 917 transitions. [2020-12-22 04:35:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 04:35:47,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:47,244 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:47,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:35:47,458 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash 21201355, now seen corresponding path program 6 times [2020-12-22 04:35:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878855111] [2020-12-22 04:35:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 802 proven. 376 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-22 04:35:47,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878855111] [2020-12-22 04:35:47,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127948644] [2020-12-22 04:35:47,705 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:47,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:35:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:35:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 821 proven. 31 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2020-12-22 04:35:48,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:48,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2020-12-22 04:35:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451634669] [2020-12-22 04:35:48,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:35:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:35:48,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:35:48,050 INFO L87 Difference]: Start difference. First operand 800 states and 917 transitions. Second operand 26 states. [2020-12-22 04:35:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:49,710 INFO L93 Difference]: Finished difference Result 2156 states and 2465 transitions. [2020-12-22 04:35:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:35:49,711 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-12-22 04:35:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:49,717 INFO L225 Difference]: With dead ends: 2156 [2020-12-22 04:35:49,717 INFO L226 Difference]: Without dead ends: 1500 [2020-12-22 04:35:49,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=722, Invalid=1630, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:35:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2020-12-22 04:35:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1019. [2020-12-22 04:35:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-12-22 04:35:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1163 transitions. [2020-12-22 04:35:49,849 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1163 transitions. Word has length 111 [2020-12-22 04:35:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:49,849 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1163 transitions. [2020-12-22 04:35:49,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:35:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1163 transitions. [2020-12-22 04:35:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 04:35:49,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:49,852 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:50,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:35:50,067 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash -645031407, now seen corresponding path program 1 times [2020-12-22 04:35:50,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:50,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753862072] [2020-12-22 04:35:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2020-12-22 04:35:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753862072] [2020-12-22 04:35:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912830266] [2020-12-22 04:35:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:50,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:35:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2020-12-22 04:35:50,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:50,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:35:50,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75377637] [2020-12-22 04:35:50,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:35:50,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:35:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:35:50,597 INFO L87 Difference]: Start difference. First operand 1019 states and 1163 transitions. Second operand 23 states. [2020-12-22 04:35:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:51,021 INFO L93 Difference]: Finished difference Result 2321 states and 2623 transitions. [2020-12-22 04:35:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:35:51,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 129 [2020-12-22 04:35:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:51,026 INFO L225 Difference]: With dead ends: 2321 [2020-12-22 04:35:51,026 INFO L226 Difference]: Without dead ends: 1483 [2020-12-22 04:35:51,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:35:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-12-22 04:35:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1073. [2020-12-22 04:35:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2020-12-22 04:35:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1225 transitions. [2020-12-22 04:35:51,148 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1225 transitions. Word has length 129 [2020-12-22 04:35:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:51,148 INFO L481 AbstractCegarLoop]: Abstraction has 1073 states and 1225 transitions. [2020-12-22 04:35:51,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:35:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1225 transitions. [2020-12-22 04:35:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 04:35:51,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:51,150 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:51,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:51,364 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1654369847, now seen corresponding path program 2 times [2020-12-22 04:35:51,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:51,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198552911] [2020-12-22 04:35:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 1242 proven. 590 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2020-12-22 04:35:51,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198552911] [2020-12-22 04:35:51,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31202961] [2020-12-22 04:35:51,740 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:51,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:35:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 5 proven. 1790 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2020-12-22 04:35:52,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:52,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 26 [2020-12-22 04:35:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009959345] [2020-12-22 04:35:52,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:35:52,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:35:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:35:52,017 INFO L87 Difference]: Start difference. First operand 1073 states and 1225 transitions. Second operand 26 states. [2020-12-22 04:35:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:52,918 INFO L93 Difference]: Finished difference Result 2704 states and 3095 transitions. [2020-12-22 04:35:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:35:52,919 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2020-12-22 04:35:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:52,925 INFO L225 Difference]: With dead ends: 2704 [2020-12-22 04:35:52,925 INFO L226 Difference]: Without dead ends: 1824 [2020-12-22 04:35:52,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=786, Invalid=1376, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:35:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2020-12-22 04:35:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1420. [2020-12-22 04:35:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1420 states. [2020-12-22 04:35:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1647 transitions. [2020-12-22 04:35:53,080 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1647 transitions. Word has length 135 [2020-12-22 04:35:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:53,081 INFO L481 AbstractCegarLoop]: Abstraction has 1420 states and 1647 transitions. [2020-12-22 04:35:53,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:35:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1647 transitions. [2020-12-22 04:35:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 04:35:53,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:53,084 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:35:53,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:35:53,299 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1284784431, now seen corresponding path program 3 times [2020-12-22 04:35:53,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:53,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411839460] [2020-12-22 04:35:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-22 04:35:53,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411839460] [2020-12-22 04:35:53,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057322824] [2020-12-22 04:35:53,651 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:53,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:35:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:53,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:35:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-12-22 04:35:54,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:54,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2020-12-22 04:35:54,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882908149] [2020-12-22 04:35:54,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:35:54,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:35:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:35:54,093 INFO L87 Difference]: Start difference. First operand 1420 states and 1647 transitions. Second operand 30 states. [2020-12-22 04:35:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:57,429 INFO L93 Difference]: Finished difference Result 3276 states and 3762 transitions. [2020-12-22 04:35:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-22 04:35:57,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-12-22 04:35:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:57,436 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 04:35:57,436 INFO L226 Difference]: Without dead ends: 2063 [2020-12-22 04:35:57,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2278, Invalid=7622, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 04:35:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2020-12-22 04:35:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1567. [2020-12-22 04:35:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2020-12-22 04:35:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 1808 transitions. [2020-12-22 04:35:57,584 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 1808 transitions. Word has length 141 [2020-12-22 04:35:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:57,584 INFO L481 AbstractCegarLoop]: Abstraction has 1567 states and 1808 transitions. [2020-12-22 04:35:57,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:35:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 1808 transitions. [2020-12-22 04:35:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 04:35:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:57,587 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 43, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:57,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:57,802 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1559524024, now seen corresponding path program 7 times [2020-12-22 04:35:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:57,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279400264] [2020-12-22 04:35:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3066 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-12-22 04:35:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279400264] [2020-12-22 04:35:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057546726] [2020-12-22 04:35:58,209 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:35:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3066 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-12-22 04:35:58,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:58,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:35:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875032040] [2020-12-22 04:35:58,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:35:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:35:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:35:58,427 INFO L87 Difference]: Start difference. First operand 1567 states and 1808 transitions. Second operand 26 states. [2020-12-22 04:35:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:59,043 INFO L93 Difference]: Finished difference Result 3412 states and 3920 transitions. [2020-12-22 04:35:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:35:59,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 150 [2020-12-22 04:35:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:59,053 INFO L225 Difference]: With dead ends: 3412 [2020-12-22 04:35:59,053 INFO L226 Difference]: Without dead ends: 2067 [2020-12-22 04:35:59,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:35:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2020-12-22 04:35:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1642. [2020-12-22 04:35:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2020-12-22 04:35:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1895 transitions. [2020-12-22 04:35:59,243 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1895 transitions. Word has length 150 [2020-12-22 04:35:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:59,244 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 1895 transitions. [2020-12-22 04:35:59,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:35:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1895 transitions. [2020-12-22 04:35:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 04:35:59,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:59,246 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:59,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:35:59,459 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1723183763, now seen corresponding path program 8 times [2020-12-22 04:35:59,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:59,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027759711] [2020-12-22 04:35:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-12-22 04:35:59,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027759711] [2020-12-22 04:35:59,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041369707] [2020-12-22 04:35:59,861 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:35:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-12-22 04:36:00,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:00,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:36:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449521975] [2020-12-22 04:36:00,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:36:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:36:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:36:00,081 INFO L87 Difference]: Start difference. First operand 1642 states and 1895 transitions. Second operand 27 states. [2020-12-22 04:36:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:00,534 INFO L93 Difference]: Finished difference Result 3556 states and 4088 transitions. [2020-12-22 04:36:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:36:00,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 153 [2020-12-22 04:36:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:00,542 INFO L225 Difference]: With dead ends: 3556 [2020-12-22 04:36:00,542 INFO L226 Difference]: Without dead ends: 2149 [2020-12-22 04:36:00,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:36:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2020-12-22 04:36:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1720. [2020-12-22 04:36:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 04:36:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 1985 transitions. [2020-12-22 04:36:00,712 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 1985 transitions. Word has length 153 [2020-12-22 04:36:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:00,712 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 1985 transitions. [2020-12-22 04:36:00,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:36:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 1985 transitions. [2020-12-22 04:36:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 04:36:00,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:00,715 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 46, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:00,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:36:00,929 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1261910453, now seen corresponding path program 9 times [2020-12-22 04:36:00,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:00,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769805247] [2020-12-22 04:36:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-12-22 04:36:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769805247] [2020-12-22 04:36:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023865465] [2020-12-22 04:36:01,409 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:01,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:36:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:36:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2020-12-22 04:36:01,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:01,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [27] total 29 [2020-12-22 04:36:01,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693805004] [2020-12-22 04:36:01,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:36:01,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:36:01,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:36:01,630 INFO L87 Difference]: Start difference. First operand 1720 states and 1985 transitions. Second operand 4 states. [2020-12-22 04:36:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:01,845 INFO L93 Difference]: Finished difference Result 2470 states and 2782 transitions. [2020-12-22 04:36:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:36:01,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 04:36:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:01,854 INFO L225 Difference]: With dead ends: 2470 [2020-12-22 04:36:01,854 INFO L226 Difference]: Without dead ends: 2054 [2020-12-22 04:36:01,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:36:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2020-12-22 04:36:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1718. [2020-12-22 04:36:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 04:36:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1978 transitions. [2020-12-22 04:36:02,078 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1978 transitions. Word has length 159 [2020-12-22 04:36:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:02,078 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 1978 transitions. [2020-12-22 04:36:02,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:36:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1978 transitions. [2020-12-22 04:36:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 04:36:02,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:02,084 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 69, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2020-12-22 04:36:02,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:36:02,298 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash 938301199, now seen corresponding path program 4 times [2020-12-22 04:36:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198602227] [2020-12-22 04:36:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7902 backedges. 3556 proven. 852 refuted. 0 times theorem prover too weak. 3494 trivial. 0 not checked. [2020-12-22 04:36:02,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198602227] [2020-12-22 04:36:02,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145730033] [2020-12-22 04:36:02,789 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:02,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:36:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7902 backedges. 3556 proven. 852 refuted. 0 times theorem prover too weak. 3494 trivial. 0 not checked. [2020-12-22 04:36:03,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:03,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:36:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597590509] [2020-12-22 04:36:03,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:36:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:36:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:03,151 INFO L87 Difference]: Start difference. First operand 1718 states and 1978 transitions. Second operand 28 states. [2020-12-22 04:36:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:03,592 INFO L93 Difference]: Finished difference Result 3757 states and 4304 transitions. [2020-12-22 04:36:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:36:03,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 237 [2020-12-22 04:36:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:03,600 INFO L225 Difference]: With dead ends: 3757 [2020-12-22 04:36:03,600 INFO L226 Difference]: Without dead ends: 2289 [2020-12-22 04:36:03,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-12-22 04:36:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1802. [2020-12-22 04:36:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2020-12-22 04:36:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2074 transitions. [2020-12-22 04:36:03,739 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2074 transitions. Word has length 237 [2020-12-22 04:36:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:03,739 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 2074 transitions. [2020-12-22 04:36:03,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:36:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2074 transitions. [2020-12-22 04:36:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 04:36:03,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:03,743 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 72, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2020-12-22 04:36:03,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:03,958 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1915880484, now seen corresponding path program 5 times [2020-12-22 04:36:03,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:03,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407838090] [2020-12-22 04:36:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8568 backedges. 3854 proven. 925 refuted. 0 times theorem prover too weak. 3789 trivial. 0 not checked. [2020-12-22 04:36:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407838090] [2020-12-22 04:36:04,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112853843] [2020-12-22 04:36:04,471 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:04,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-22 04:36:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:36:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8568 backedges. 4012 proven. 876 refuted. 0 times theorem prover too weak. 3680 trivial. 0 not checked. [2020-12-22 04:36:05,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:05,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2020-12-22 04:36:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975769940] [2020-12-22 04:36:05,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:36:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:05,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:36:05,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:36:05,852 INFO L87 Difference]: Start difference. First operand 1802 states and 2074 transitions. Second operand 56 states. [2020-12-22 04:36:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:28,866 INFO L93 Difference]: Finished difference Result 11694 states and 13502 transitions. [2020-12-22 04:36:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2020-12-22 04:36:28,866 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 246 [2020-12-22 04:36:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:28,897 INFO L225 Difference]: With dead ends: 11694 [2020-12-22 04:36:28,897 INFO L226 Difference]: Without dead ends: 10161 [2020-12-22 04:36:28,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112728 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=64328, Invalid=145894, Unknown=0, NotChecked=0, Total=210222 [2020-12-22 04:36:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10161 states. [2020-12-22 04:36:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10161 to 6709. [2020-12-22 04:36:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6709 states. [2020-12-22 04:36:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 7247 transitions. [2020-12-22 04:36:29,918 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 7247 transitions. Word has length 246 [2020-12-22 04:36:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:29,918 INFO L481 AbstractCegarLoop]: Abstraction has 6709 states and 7247 transitions. [2020-12-22 04:36:29,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:36:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 7247 transitions. [2020-12-22 04:36:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 04:36:29,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:29,931 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2020-12-22 04:36:30,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:36:30,145 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1507058001, now seen corresponding path program 6 times [2020-12-22 04:36:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:30,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595914927] [2020-12-22 04:36:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9261 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2020-12-22 04:36:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595914927] [2020-12-22 04:36:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196860808] [2020-12-22 04:36:30,721 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:30,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:36:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:36:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:31,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9261 backedges. 4248 proven. 1 refuted. 0 times theorem prover too weak. 5012 trivial. 0 not checked. [2020-12-22 04:36:31,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:31,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 35 [2020-12-22 04:36:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670496836] [2020-12-22 04:36:31,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:36:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:36:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=767, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:36:31,168 INFO L87 Difference]: Start difference. First operand 6709 states and 7247 transitions. Second operand 35 states. [2020-12-22 04:36:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:35,514 INFO L93 Difference]: Finished difference Result 12982 states and 14192 transitions. [2020-12-22 04:36:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:36:35,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 255 [2020-12-22 04:36:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:35,515 INFO L225 Difference]: With dead ends: 12982 [2020-12-22 04:36:35,515 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:36:35,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2659, Invalid=5713, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:36:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:36:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:36:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:36:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:36:35,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2020-12-22 04:36:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:35,527 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:36:35,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:36:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:36:35,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:36:35,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:35,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:36:35,928 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 21