/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/array-cav19/array_tripl_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:46:21,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:46:21,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:46:22,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:46:22,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:46:22,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:46:22,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:46:22,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:46:22,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:46:22,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:46:22,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:46:22,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:46:22,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:46:22,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:46:22,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:46:22,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:46:22,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:46:22,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:46:22,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:46:22,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:46:22,175 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:46:22,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:46:22,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:46:22,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:46:22,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:46:22,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:46:22,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:46:22,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:46:22,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:46:22,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:46:22,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:46:22,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:46:22,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:46:22,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:46:22,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:46:22,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:46:22,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:46:22,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:46:22,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:46:22,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:46:22,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:46:22,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:46:22,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:46:22,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:46:22,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:46:22,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:46:22,621 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:46:22,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2020-12-21 22:46:22,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49826c9d/bbb967fbc89b4d0f8d95aac7d7d384e9/FLAG9ed2a227a [2020-12-21 22:46:23,374 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:46:23,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2020-12-21 22:46:23,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49826c9d/bbb967fbc89b4d0f8d95aac7d7d384e9/FLAG9ed2a227a [2020-12-21 22:46:23,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49826c9d/bbb967fbc89b4d0f8d95aac7d7d384e9 [2020-12-21 22:46:23,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:46:23,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:46:23,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:46:23,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:46:23,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:46:23,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:23,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f73446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23, skipping insertion in model container [2020-12-21 22:46:23,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:23,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:46:23,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:46:23,935 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/array-cav19/array_tripl_access_init_const.c[420,433] [2020-12-21 22:46:23,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:46:23,961 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:46:23,975 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/array-cav19/array_tripl_access_init_const.c[420,433] [2020-12-21 22:46:23,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:46:23,997 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:46:23,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23 WrapperNode [2020-12-21 22:46:23,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:46:23,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:46:24,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:46:24,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:46:24,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:46:24,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:46:24,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:46:24,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:46:24,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... [2020-12-21 22:46:24,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:46:24,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:46:24,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:46:24,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:46:24,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:46:24,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:46:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:46:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:46:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:46:24,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:46:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:46:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:46:24,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:46:24,549 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:46:24,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:46:24 BoogieIcfgContainer [2020-12-21 22:46:24,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:46:24,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:46:24,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:46:24,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:46:24,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:46:23" (1/3) ... [2020-12-21 22:46:24,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2009172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:46:24, skipping insertion in model container [2020-12-21 22:46:24,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:23" (2/3) ... [2020-12-21 22:46:24,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2009172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:46:24, skipping insertion in model container [2020-12-21 22:46:24,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:46:24" (3/3) ... [2020-12-21 22:46:24,566 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2020-12-21 22:46:24,578 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:46:24,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:46:24,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:46:24,637 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:46:24,637 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:46:24,637 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:46:24,638 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:46:24,638 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:46:24,638 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:46:24,638 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:46:24,638 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:46:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-21 22:46:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 22:46:24,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:24,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:24,662 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:24,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-21 22:46:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:24,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215258402] [2020-12-21 22:46:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215258402] [2020-12-21 22:46:24,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:46:24,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:46:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622891965] [2020-12-21 22:46:24,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:46:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:46:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:46:25,019 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-21 22:46:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:25,129 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-21 22:46:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:46:25,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-21 22:46:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:25,141 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:46:25,141 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:46:25,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:46:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:46:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-21 22:46:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 22:46:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-21 22:46:25,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-12-21 22:46:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:25,185 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-21 22:46:25,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:46:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-21 22:46:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:46:25,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:25,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:25,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:46:25,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-21 22:46:25,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:25,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402069037] [2020-12-21 22:46:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402069037] [2020-12-21 22:46:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193665252] [2020-12-21 22:46:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:46:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:25,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:25,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:46:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021331160] [2020-12-21 22:46:25,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:46:25,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:46:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:46:25,489 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-21 22:46:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:25,542 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-21 22:46:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:46:25,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-21 22:46:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:25,544 INFO L225 Difference]: With dead ends: 22 [2020-12-21 22:46:25,544 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 22:46:25,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:46:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 22:46:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-21 22:46:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 22:46:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-21 22:46:25,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-21 22:46:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:25,551 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-21 22:46:25,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:46:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-21 22:46:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:46:25,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:25,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:25,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 22:46:25,766 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-21 22:46:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734335325] [2020-12-21 22:46:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:25,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734335325] [2020-12-21 22:46:25,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695700783] [2020-12-21 22:46:25,874 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:25,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:46:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:46:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:46:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192135864] [2020-12-21 22:46:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:46:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:46:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:46:26,034 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-21 22:46:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:26,078 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-21 22:46:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:46:26,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-21 22:46:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:26,080 INFO L225 Difference]: With dead ends: 24 [2020-12-21 22:46:26,080 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:46:26,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:46:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:46:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 22:46:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 22:46:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-21 22:46:26,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-21 22:46:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:26,086 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-21 22:46:26,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:46:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-21 22:46:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:46:26,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:26,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:26,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:26,303 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-21 22:46:26,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:26,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077762721] [2020-12-21 22:46:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:26,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077762721] [2020-12-21 22:46:26,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390012721] [2020-12-21 22:46:26,378 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:26,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:46:26,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:26,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:46:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:26,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:26,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:46:26,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047704927] [2020-12-21 22:46:26,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:46:26,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:46:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:46:26,527 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-21 22:46:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:26,573 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-21 22:46:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:46:26,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-21 22:46:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:26,574 INFO L225 Difference]: With dead ends: 26 [2020-12-21 22:46:26,574 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 22:46:26,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:46:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 22:46:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-21 22:46:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:46:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-21 22:46:26,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-12-21 22:46:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:26,580 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-21 22:46:26,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:46:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-21 22:46:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:46:26,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:26,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:26,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:26,795 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:26,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-21 22:46:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:26,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480994973] [2020-12-21 22:46:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:26,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480994973] [2020-12-21 22:46:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074692055] [2020-12-21 22:46:26,913 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:26,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:46:26,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:46:26,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:27,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:27,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-21 22:46:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736801670] [2020-12-21 22:46:27,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:46:27,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:46:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:46:27,070 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-21 22:46:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:27,120 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-21 22:46:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:46:27,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-21 22:46:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:27,122 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:46:27,122 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 22:46:27,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:46:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 22:46:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-21 22:46:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:46:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-21 22:46:27,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-21 22:46:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:27,128 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-21 22:46:27,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:46:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-21 22:46:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:46:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:27,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:27,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:27,345 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-21 22:46:27,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:27,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233658832] [2020-12-21 22:46:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233658832] [2020-12-21 22:46:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583702944] [2020-12-21 22:46:27,427 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:27,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:46:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:46:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:27,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:27,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-21 22:46:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863794391] [2020-12-21 22:46:27,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:46:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:46:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:46:27,687 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-21 22:46:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:27,751 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-21 22:46:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:46:27,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-21 22:46:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:27,752 INFO L225 Difference]: With dead ends: 30 [2020-12-21 22:46:27,752 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:46:27,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:46:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:46:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 22:46:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:46:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-21 22:46:27,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-12-21 22:46:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:27,758 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-21 22:46:27,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:46:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-21 22:46:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:46:27,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:27,759 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:27,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 22:46:27,974 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-21 22:46:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:27,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403743455] [2020-12-21 22:46:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403743455] [2020-12-21 22:46:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858727830] [2020-12-21 22:46:28,123 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:28,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:46:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:46:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:28,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:28,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-21 22:46:28,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112162732] [2020-12-21 22:46:28,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:46:28,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:46:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:46:28,478 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-21 22:46:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:28,592 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-21 22:46:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:46:28,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-21 22:46:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:28,594 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:46:28,594 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 22:46:28,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:46:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 22:46:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-21 22:46:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:46:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-21 22:46:28,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-21 22:46:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:28,599 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-21 22:46:28,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:46:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-21 22:46:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:46:28,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:28,600 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:28,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:28,806 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-21 22:46:28,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:28,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706213985] [2020-12-21 22:46:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:28,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706213985] [2020-12-21 22:46:28,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039122480] [2020-12-21 22:46:28,942 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:46:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:29,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:29,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-21 22:46:29,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261717891] [2020-12-21 22:46:29,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:46:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:46:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:46:29,158 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-21 22:46:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:29,215 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-21 22:46:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:46:29,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-21 22:46:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:29,217 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:46:29,217 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:46:29,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:46:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:46:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 22:46:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:46:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-21 22:46:29,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-12-21 22:46:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:29,223 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-21 22:46:29,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:46:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-21 22:46:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:46:29,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:29,224 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:29,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:29,437 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-21 22:46:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:29,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120488910] [2020-12-21 22:46:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:29,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120488910] [2020-12-21 22:46:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721352999] [2020-12-21 22:46:29,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:29,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:46:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:46:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:29,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:29,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-21 22:46:29,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112540460] [2020-12-21 22:46:29,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:46:29,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:46:29,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:46:29,807 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-21 22:46:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:29,896 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-21 22:46:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:46:29,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-21 22:46:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:29,898 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:46:29,898 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:46:29,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:46:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:46:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-21 22:46:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:46:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-21 22:46:29,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-12-21 22:46:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:29,905 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-21 22:46:29,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:46:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-21 22:46:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:46:29,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:29,906 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:30,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 22:46:30,107 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-21 22:46:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:30,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529828438] [2020-12-21 22:46:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529828438] [2020-12-21 22:46:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053667019] [2020-12-21 22:46:30,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:30,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:46:30,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:30,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:46:30,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:30,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:30,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-21 22:46:30,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496439785] [2020-12-21 22:46:30,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:46:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:46:30,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:46:30,814 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-21 22:46:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:30,919 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-21 22:46:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:46:30,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-21 22:46:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:30,920 INFO L225 Difference]: With dead ends: 38 [2020-12-21 22:46:30,920 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 22:46:30,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:46:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 22:46:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-21 22:46:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:46:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-21 22:46:30,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-12-21 22:46:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:30,926 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-21 22:46:30,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:46:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-21 22:46:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:46:30,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:30,927 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:31,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:31,140 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-21 22:46:31,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:31,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867580955] [2020-12-21 22:46:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867580955] [2020-12-21 22:46:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952471960] [2020-12-21 22:46:31,319 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 [2020-12-21 22:46:31,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:46:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:46:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:31,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:31,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-21 22:46:31,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569081823] [2020-12-21 22:46:31,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:46:31,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:46:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:46:31,628 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-21 22:46:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:31,714 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-21 22:46:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:46:31,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-21 22:46:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:31,716 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:46:31,716 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:46:31,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:46:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:46:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-21 22:46:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:46:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-21 22:46:31,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-21 22:46:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:31,722 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-21 22:46:31,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:46:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-21 22:46:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:46:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:31,724 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:31,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:31,939 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-21 22:46:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:31,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677034301] [2020-12-21 22:46:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677034301] [2020-12-21 22:46:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358820000] [2020-12-21 22:46:32,182 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 [2020-12-21 22:46:33,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 22:46:33,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:46:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:33,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:33,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-21 22:46:33,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762714704] [2020-12-21 22:46:33,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 22:46:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 22:46:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:46:33,345 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-21 22:46:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:33,451 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-21 22:46:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:46:33,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-21 22:46:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:33,453 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:46:33,453 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:46:33,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:46:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:46:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 22:46:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:46:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-21 22:46:33,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-12-21 22:46:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:33,459 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-21 22:46:33,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 22:46:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-21 22:46:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:46:33,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:33,460 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:33,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 22:46:33,674 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-21 22:46:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965031460] [2020-12-21 22:46:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965031460] [2020-12-21 22:46:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837973630] [2020-12-21 22:46:33,858 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 [2020-12-21 22:46:35,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:46:35,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:46:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:35,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:35,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-21 22:46:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767339445] [2020-12-21 22:46:35,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:46:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:46:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:46:35,519 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-21 22:46:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:35,614 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-21 22:46:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:46:35,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-21 22:46:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:35,615 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:46:35,615 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:46:35,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:46:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:46:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 22:46:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:46:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-21 22:46:35,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-12-21 22:46:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:35,621 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-21 22:46:35,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:46:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-21 22:46:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 22:46:35,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:35,623 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:35,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:46:35,838 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:35,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:35,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-21 22:46:35,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:35,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156313740] [2020-12-21 22:46:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156313740] [2020-12-21 22:46:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740942582] [2020-12-21 22:46:36,092 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:46:36,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-21 22:46:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343355243] [2020-12-21 22:46:36,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 22:46:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 22:46:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:46:36,455 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-21 22:46:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:36,576 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-21 22:46:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:46:36,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-21 22:46:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:36,577 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:46:36,577 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:46:36,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:46:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:46:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-21 22:46:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 22:46:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-21 22:46:36,583 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-12-21 22:46:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:36,583 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-21 22:46:36,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 22:46:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-21 22:46:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:46:36,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:36,584 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:36,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:46:36,792 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-21 22:46:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:36,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693875458] [2020-12-21 22:46:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693875458] [2020-12-21 22:46:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927412083] [2020-12-21 22:46:37,019 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 [2020-12-21 22:46:37,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:46:37,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:46:37,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:37,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:37,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-21 22:46:37,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59999430] [2020-12-21 22:46:37,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:46:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:46:37,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:46:37,369 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-21 22:46:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:37,486 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-21 22:46:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:46:37,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-21 22:46:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:37,488 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:46:37,488 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:46:37,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:46:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:46:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 22:46:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:46:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-21 22:46:37,494 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-12-21 22:46:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:37,494 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-21 22:46:37,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:46:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-21 22:46:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:46:37,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:37,495 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:37,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:37,710 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:37,711 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-21 22:46:37,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:37,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374574269] [2020-12-21 22:46:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374574269] [2020-12-21 22:46:37,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202878728] [2020-12-21 22:46:37,944 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 [2020-12-21 22:46:40,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 22:46:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:46:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:41,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:41,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-12-21 22:46:41,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425214624] [2020-12-21 22:46:41,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 22:46:41,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 22:46:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:46:41,025 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-21 22:46:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:41,156 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-21 22:46:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:46:41,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-21 22:46:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:41,158 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:46:41,158 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:46:41,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:46:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:46:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-21 22:46:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:46:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-21 22:46:41,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-12-21 22:46:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:41,164 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-21 22:46:41,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 22:46:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-21 22:46:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:46:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:41,165 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:41,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:46:41,380 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-21 22:46:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:41,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747434892] [2020-12-21 22:46:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:41,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747434892] [2020-12-21 22:46:41,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000796323] [2020-12-21 22:46:41,662 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:41,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:46:41,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:46:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:42,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:42,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-21 22:46:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306975815] [2020-12-21 22:46:42,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:46:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:46:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:46:42,145 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-21 22:46:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:42,306 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-21 22:46:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:46:42,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-21 22:46:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:42,307 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:46:42,308 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 22:46:42,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:46:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 22:46:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-21 22:46:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:46:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-21 22:46:42,313 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-12-21 22:46:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:42,314 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-21 22:46:42,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:46:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-21 22:46:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:46:42,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:42,315 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:42,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:46:42,523 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-21 22:46:42,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:42,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813472771] [2020-12-21 22:46:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813472771] [2020-12-21 22:46:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581794937] [2020-12-21 22:46:42,861 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:54,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 22:46:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:46:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:54,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:54,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-21 22:46:54,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755954620] [2020-12-21 22:46:54,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 22:46:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 22:46:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:46:54,941 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-21 22:46:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:55,089 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-21 22:46:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:46:55,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-21 22:46:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:55,091 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:46:55,091 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 22:46:55,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:46:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 22:46:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-21 22:46:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:46:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-21 22:46:55,097 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-12-21 22:46:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:55,097 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-21 22:46:55,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 22:46:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-21 22:46:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:46:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:55,099 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:55,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:46:55,313 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-21 22:46:55,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51381030] [2020-12-21 22:46:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:55,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51381030] [2020-12-21 22:46:55,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353847410] [2020-12-21 22:46:55,673 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:07,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 22:47:07,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:07,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:47:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:07,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:07,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-21 22:47:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49704269] [2020-12-21 22:47:07,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:47:07,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:47:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:47:07,691 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-21 22:47:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:07,833 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-21 22:47:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 22:47:07,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-21 22:47:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:07,836 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:47:07,837 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 22:47:07,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:47:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 22:47:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 22:47:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:47:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-21 22:47:07,844 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2020-12-21 22:47:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:07,845 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-21 22:47:07,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:47:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-21 22:47:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 22:47:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:07,851 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:08,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:08,067 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-21 22:47:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:08,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653156762] [2020-12-21 22:47:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653156762] [2020-12-21 22:47:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56887894] [2020-12-21 22:47:08,466 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:47:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:09,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:09,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-21 22:47:09,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115133571] [2020-12-21 22:47:09,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:47:09,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:47:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:47:09,066 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-21 22:47:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:09,232 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-21 22:47:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:47:09,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-21 22:47:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:09,234 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:47:09,234 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:47:09,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:47:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:47:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-21 22:47:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:47:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-21 22:47:09,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-12-21 22:47:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:09,240 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-21 22:47:09,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:47:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-21 22:47:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:47:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:09,241 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:09,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:09,456 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-21 22:47:09,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:09,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274579236] [2020-12-21 22:47:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:09,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274579236] [2020-12-21 22:47:09,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033764180] [2020-12-21 22:47:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:09,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:09,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:47:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:10,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:10,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-21 22:47:10,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856265952] [2020-12-21 22:47:10,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:47:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:47:10,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:47:10,564 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-21 22:47:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:10,697 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-21 22:47:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 22:47:10,698 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-21 22:47:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:10,699 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:47:10,699 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 22:47:10,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:47:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 22:47:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 22:47:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:47:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-21 22:47:10,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-21 22:47:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:10,704 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-21 22:47:10,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:47:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-21 22:47:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:47:10,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:10,706 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:10,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:47:10,918 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-21 22:47:10,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:10,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768743932] [2020-12-21 22:47:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768743932] [2020-12-21 22:47:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504715901] [2020-12-21 22:47:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:48,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-21 22:47:48,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:47:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:49,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2020-12-21 22:47:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096173753] [2020-12-21 22:47:49,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 22:47:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 22:47:49,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:47:49,396 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-21 22:47:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:49,554 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-21 22:47:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:47:49,555 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-21 22:47:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:49,555 INFO L225 Difference]: With dead ends: 62 [2020-12-21 22:47:49,555 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 22:47:49,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:47:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 22:47:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 22:47:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:47:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-21 22:47:49,561 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-12-21 22:47:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:49,561 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-21 22:47:49,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 22:47:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-21 22:47:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:47:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:49,562 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:49,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:47:49,763 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-21 22:47:49,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:49,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035217137] [2020-12-21 22:47:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:50,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035217137] [2020-12-21 22:47:50,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718111826] [2020-12-21 22:47:50,247 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:50,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:47:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:50,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:50,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-21 22:47:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531184233] [2020-12-21 22:47:50,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 22:47:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 22:47:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:47:50,974 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-21 22:47:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:51,114 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-21 22:47:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:47:51,115 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-21 22:47:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:51,115 INFO L225 Difference]: With dead ends: 64 [2020-12-21 22:47:51,116 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:47:51,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:47:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:47:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-21 22:47:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:47:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-21 22:47:51,121 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-12-21 22:47:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:51,121 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-21 22:47:51,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 22:47:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-21 22:47:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 22:47:51,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:51,122 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:51,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:51,337 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-21 22:47:51,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:51,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677828612] [2020-12-21 22:47:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677828612] [2020-12-21 22:47:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029757856] [2020-12-21 22:47:51,831 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:16,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 22:49:16,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:49:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:17,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:17,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-21 22:49:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118080621] [2020-12-21 22:49:17,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:49:17,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:49:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:49:17,108 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2020-12-21 22:49:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:17,345 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-21 22:49:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:49:17,346 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2020-12-21 22:49:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:17,347 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:49:17,347 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:49:17,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:49:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:49:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-21 22:49:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 22:49:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-21 22:49:17,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-12-21 22:49:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:17,355 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-21 22:49:17,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:49:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-21 22:49:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 22:49:17,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:17,357 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:17,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 22:49:17,558 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-21 22:49:17,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:17,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257137064] [2020-12-21 22:49:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257137064] [2020-12-21 22:49:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959539425] [2020-12-21 22:49:18,120 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 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