/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-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:34,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:34,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:34,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:38:34,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:38:34,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:38:34,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:38:34,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:38:34,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:38:34,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:38:34,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:38:34,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:38:34,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:38:34,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:38:34,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:38:34,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:38:34,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:38:34,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:38:34,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:38:34,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:38:34,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:38:34,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:38:34,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:38:34,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:38:34,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:38:34,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:38:34,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:38:34,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:38:34,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:38:34,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:38:34,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:38:34,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:38:34,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:38:34,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:38:34,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:38:34,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:38:34,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:38:34,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:38:34,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:34,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:34,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:34,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:34,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:34,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:34,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:34,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:34,474 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:34,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:34,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:34,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:34,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:34,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:34,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:34,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:34,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:34,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:34,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:34,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:34,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:34,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:34,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:34,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:34,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:34,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:34,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:34,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:34,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:34,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:34,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:34,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:34,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:34,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:34,981 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:34,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2020-12-21 21:38:35,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39c987292/4764e90d65c041aabf7be59a9de987f4/FLAG6320cd9ea [2020-12-21 21:38:35,703 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:35,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2020-12-21 21:38:35,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39c987292/4764e90d65c041aabf7be59a9de987f4/FLAG6320cd9ea [2020-12-21 21:38:36,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39c987292/4764e90d65c041aabf7be59a9de987f4 [2020-12-21 21:38:36,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:36,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:36,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:36,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:36,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:36,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f42e58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36, skipping insertion in model container [2020-12-21 21:38:36,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:36,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:36,397 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-examples/standard_minInArray_ground-2.i[821,834] [2020-12-21 21:38:36,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:36,434 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:36,454 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-examples/standard_minInArray_ground-2.i[821,834] [2020-12-21 21:38:36,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:36,494 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:36,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36 WrapperNode [2020-12-21 21:38:36,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:36,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:36,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:36,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:36,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:36,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:36,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:36,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:36,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (1/1) ... [2020-12-21 21:38:36,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:36,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:36,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:36,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:36,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (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 21:38:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:36,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:36,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:36,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:37,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:37,004 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:38:37,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:37 BoogieIcfgContainer [2020-12-21 21:38:37,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:37,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:37,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:37,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:37,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:36" (1/3) ... [2020-12-21 21:38:37,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8e6b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:37, skipping insertion in model container [2020-12-21 21:38:37,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:36" (2/3) ... [2020-12-21 21:38:37,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8e6b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:37, skipping insertion in model container [2020-12-21 21:38:37,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:37" (3/3) ... [2020-12-21 21:38:37,022 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2020-12-21 21:38:37,035 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:37,041 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:38:37,068 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:38:37,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:37,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:37,156 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:37,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:37,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:37,157 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:37,157 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:37,157 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:38:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:37,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:37,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:37,186 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2020-12-21 21:38:37,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:37,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718748541] [2020-12-21 21:38:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:37,445 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 21:38:37,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718748541] [2020-12-21 21:38:37,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:37,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:37,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589520711] [2020-12-21 21:38:37,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:37,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:37,489 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:38:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:37,522 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-21 21:38:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:37,525 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:38:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:37,543 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:38:37,543 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:38:37,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:38:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:38:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:38:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:38:37,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 21:38:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:37,594 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:38:37,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:38:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:37,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:37,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:37,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:37,598 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2020-12-21 21:38:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:37,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435747862] [2020-12-21 21:38:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:37,740 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 21:38:37,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435747862] [2020-12-21 21:38:37,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:37,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:37,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719796013] [2020-12-21 21:38:37,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:37,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:37,745 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-21 21:38:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:37,855 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-12-21 21:38:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:37,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:38:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:37,858 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:38:37,858 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:38:37,863 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 21:38:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:38:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-21 21:38:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:38:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:38:37,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2020-12-21 21:38:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:37,879 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:38:37,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:38:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:38:37,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:37,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:37,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:37,886 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2020-12-21 21:38:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:37,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294649567] [2020-12-21 21:38:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:37,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294649567] [2020-12-21 21:38:37,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131479911] [2020-12-21 21:38:37,999 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 21:38:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:38,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:38,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:38,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756425725] [2020-12-21 21:38:38,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:38,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:38,142 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:38:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:38,198 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-21 21:38:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:38,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:38:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:38,200 INFO L225 Difference]: With dead ends: 37 [2020-12-21 21:38:38,200 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:38:38,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:38:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-21 21:38:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:38:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-21 21:38:38,207 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-12-21 21:38:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:38,208 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-21 21:38:38,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-21 21:38:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:38:38,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:38,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:38,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:38:38,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 594582322, now seen corresponding path program 2 times [2020-12-21 21:38:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:38,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436570706] [2020-12-21 21:38:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:38,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436570706] [2020-12-21 21:38:38,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443489720] [2020-12-21 21:38:38,498 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 21:38:38,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:38,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:38,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:38,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:38:38,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235592700] [2020-12-21 21:38:38,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:38:38,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:38,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:38:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:38,609 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-12-21 21:38:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:38,668 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-12-21 21:38:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:38:38,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-21 21:38:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:38,670 INFO L225 Difference]: With dead ends: 45 [2020-12-21 21:38:38,670 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:38:38,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:38:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-21 21:38:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:38:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-21 21:38:38,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2020-12-21 21:38:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:38,678 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-21 21:38:38,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:38:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-21 21:38:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:38:38,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:38,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:38,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:38,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash -848302731, now seen corresponding path program 3 times [2020-12-21 21:38:38,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:38,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474556665] [2020-12-21 21:38:38,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474556665] [2020-12-21 21:38:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6805635] [2020-12-21 21:38:39,063 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 21:38:39,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:38:39,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:39,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:39,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:38:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777948394] [2020-12-21 21:38:39,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:39,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:39,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:39,288 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-12-21 21:38:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:39,403 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-12-21 21:38:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:38:39,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-21 21:38:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:39,406 INFO L225 Difference]: With dead ends: 53 [2020-12-21 21:38:39,406 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:38:39,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:38:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-21 21:38:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:38:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-21 21:38:39,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-12-21 21:38:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:39,429 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-21 21:38:39,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-21 21:38:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:38:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:39,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:39,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:39,648 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1208394382, now seen corresponding path program 4 times [2020-12-21 21:38:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:39,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239611707] [2020-12-21 21:38:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:39,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239611707] [2020-12-21 21:38:39,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766057757] [2020-12-21 21:38:39,749 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 21:38:39,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:39,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:39,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:39,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780363600] [2020-12-21 21:38:39,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:39,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:39,867 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-12-21 21:38:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:39,932 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-12-21 21:38:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:39,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:38:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:39,934 INFO L225 Difference]: With dead ends: 61 [2020-12-21 21:38:39,934 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:38:39,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:38:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-21 21:38:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:38:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-12-21 21:38:39,941 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2020-12-21 21:38:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-12-21 21:38:39,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-12-21 21:38:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:38:39,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:39,943 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:40,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:40,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash -695706087, now seen corresponding path program 5 times [2020-12-21 21:38:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:40,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224783127] [2020-12-21 21:38:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:40,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224783127] [2020-12-21 21:38:40,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518042170] [2020-12-21 21:38:40,244 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 21:38:40,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:38:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:40,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:40,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:40,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:38:40,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763523846] [2020-12-21 21:38:40,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:40,418 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-12-21 21:38:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:40,491 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-12-21 21:38:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:38:40,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-12-21 21:38:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:40,494 INFO L225 Difference]: With dead ends: 69 [2020-12-21 21:38:40,494 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:38:40,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:38:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-21 21:38:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:38:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-21 21:38:40,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 34 [2020-12-21 21:38:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:40,501 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-21 21:38:40,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-21 21:38:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:38:40,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:40,503 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:40,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:38:40,718 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2123093526, now seen corresponding path program 6 times [2020-12-21 21:38:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:40,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334225799] [2020-12-21 21:38:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334225799] [2020-12-21 21:38:40,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283841195] [2020-12-21 21:38:40,828 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 21:38:40,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:38:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:38:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:38:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566436636] [2020-12-21 21:38:41,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:38:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:38:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:41,023 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2020-12-21 21:38:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:41,117 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-12-21 21:38:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:41,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-21 21:38:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:41,119 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:38:41,119 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:38:41,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:38:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-21 21:38:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:38:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-12-21 21:38:41,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 39 [2020-12-21 21:38:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:41,126 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-12-21 21:38:41,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:38:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-12-21 21:38:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:38:41,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:41,127 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:41,342 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 133197501, now seen corresponding path program 7 times [2020-12-21 21:38:41,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:41,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286368835] [2020-12-21 21:38:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:41,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286368835] [2020-12-21 21:38:41,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762002877] [2020-12-21 21:38:41,534 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 21:38:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:41,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:41,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:41,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:38:41,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84151099] [2020-12-21 21:38:41,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:38:41,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:41,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:38:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:41,672 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2020-12-21 21:38:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:41,765 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2020-12-21 21:38:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:38:41,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-21 21:38:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:41,766 INFO L225 Difference]: With dead ends: 85 [2020-12-21 21:38:41,767 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:38:41,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:38:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-21 21:38:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:38:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-21 21:38:41,774 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 44 [2020-12-21 21:38:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:41,774 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-21 21:38:41,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:38:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-21 21:38:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:38:41,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:41,776 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:41,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:41,989 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -133500602, now seen corresponding path program 8 times [2020-12-21 21:38:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:41,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369997529] [2020-12-21 21:38:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369997529] [2020-12-21 21:38:42,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238315593] [2020-12-21 21:38:42,116 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 21:38:42,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:42,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:42,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:42,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:38:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090408455] [2020-12-21 21:38:42,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:42,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:42,359 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 12 states. [2020-12-21 21:38:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:42,493 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2020-12-21 21:38:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:38:42,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-21 21:38:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:42,494 INFO L225 Difference]: With dead ends: 93 [2020-12-21 21:38:42,494 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:38:42,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:38:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-12-21 21:38:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-21 21:38:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-12-21 21:38:42,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 49 [2020-12-21 21:38:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:42,501 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-12-21 21:38:42,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-12-21 21:38:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:38:42,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:42,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:42,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:38:42,716 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 949378913, now seen corresponding path program 9 times [2020-12-21 21:38:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:42,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950290504] [2020-12-21 21:38:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950290504] [2020-12-21 21:38:42,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741268509] [2020-12-21 21:38:42,917 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 21:38:43,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:38:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:38:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:43,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:43,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:38:43,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477997216] [2020-12-21 21:38:43,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:38:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:38:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:43,132 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2020-12-21 21:38:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:43,251 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-12-21 21:38:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:38:43,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-21 21:38:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:43,255 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:38:43,255 INFO L226 Difference]: Without dead ends: 65 [2020-12-21 21:38:43,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-21 21:38:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-12-21 21:38:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:38:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-12-21 21:38:43,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 54 [2020-12-21 21:38:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:43,281 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-12-21 21:38:43,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:38:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-12-21 21:38:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:38:43,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:43,282 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:43,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:43,488 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1285339298, now seen corresponding path program 10 times [2020-12-21 21:38:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:43,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474663603] [2020-12-21 21:38:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:38:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474663603] [2020-12-21 21:38:43,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126502570] [2020-12-21 21:38:43,676 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 21:38:43,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:38:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:38:43,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:43,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:38:43,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119301419] [2020-12-21 21:38:43,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:43,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:43,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:43,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:43,897 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 14 states. [2020-12-21 21:38:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:44,029 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-12-21 21:38:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:38:44,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-21 21:38:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:44,032 INFO L225 Difference]: With dead ends: 109 [2020-12-21 21:38:44,032 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 21:38:44,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 21:38:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-12-21 21:38:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 21:38:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-12-21 21:38:44,048 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-12-21 21:38:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:44,048 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-12-21 21:38:44,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-12-21 21:38:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:38:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:44,050 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:44,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:44,265 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash -655855611, now seen corresponding path program 11 times [2020-12-21 21:38:44,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:44,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980291400] [2020-12-21 21:38:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:38:44,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980291400] [2020-12-21 21:38:44,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390687280] [2020-12-21 21:38:44,464 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 21:38:44,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:38:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:38:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:38:44,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:44,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:38:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821281343] [2020-12-21 21:38:44,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:38:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:38:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:38:44,812 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2020-12-21 21:38:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:44,954 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2020-12-21 21:38:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:38:44,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-21 21:38:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:44,955 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:38:44,956 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:38:44,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:38:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:38:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-21 21:38:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:38:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-21 21:38:44,963 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 64 [2020-12-21 21:38:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:44,963 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-21 21:38:44,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:38:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-21 21:38:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:38:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:44,965 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:38:45,178 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1954234366, now seen corresponding path program 12 times [2020-12-21 21:38:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775114557] [2020-12-21 21:38:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:38:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775114557] [2020-12-21 21:38:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113808890] [2020-12-21 21:38:45,403 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 21:38:45,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:38:45,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:38:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:38:45,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:45,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:38:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391033280] [2020-12-21 21:38:45,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:38:45,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:45,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:38:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:38:45,852 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 16 states. [2020-12-21 21:38:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:46,005 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2020-12-21 21:38:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:38:46,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-21 21:38:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:46,007 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:38:46,007 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:38:46,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:38:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:38:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-21 21:38:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:38:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-12-21 21:38:46,014 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 69 [2020-12-21 21:38:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:46,015 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-12-21 21:38:46,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:38:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-12-21 21:38:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 21:38:46,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:46,016 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:46,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:38:46,230 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 383049897, now seen corresponding path program 13 times [2020-12-21 21:38:46,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:46,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536384155] [2020-12-21 21:38:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:38:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536384155] [2020-12-21 21:38:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503483358] [2020-12-21 21:38:46,460 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 21:38:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:38:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:38:46,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:46,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:38:46,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473070046] [2020-12-21 21:38:46,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:38:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:38:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:38:46,645 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 17 states. [2020-12-21 21:38:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:46,784 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2020-12-21 21:38:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:38:46,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-12-21 21:38:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:46,790 INFO L225 Difference]: With dead ends: 133 [2020-12-21 21:38:46,790 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:38:46,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:38:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:38:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-21 21:38:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:38:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-12-21 21:38:46,806 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 74 [2020-12-21 21:38:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:46,807 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-12-21 21:38:46,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:38:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-12-21 21:38:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:38:46,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:46,809 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:47,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:38:47,015 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:47,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1787279526, now seen corresponding path program 14 times [2020-12-21 21:38:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:47,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682467455] [2020-12-21 21:38:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:38:47,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682467455] [2020-12-21 21:38:47,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426254862] [2020-12-21 21:38:47,296 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 21:38:47,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:47,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:38:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:38:47,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:47,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:38:47,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548102918] [2020-12-21 21:38:47,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:38:47,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:38:47,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:47,487 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 18 states. [2020-12-21 21:38:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:47,713 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2020-12-21 21:38:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:38:47,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-21 21:38:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:47,721 INFO L225 Difference]: With dead ends: 141 [2020-12-21 21:38:47,721 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:38:47,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:38:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-21 21:38:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:38:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-12-21 21:38:47,736 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 79 [2020-12-21 21:38:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:47,736 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-12-21 21:38:47,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:38:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-12-21 21:38:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:38:47,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:47,737 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:47,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:47,938 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 30011725, now seen corresponding path program 15 times [2020-12-21 21:38:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:47,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882628467] [2020-12-21 21:38:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:38:48,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882628467] [2020-12-21 21:38:48,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658835617] [2020-12-21 21:38:48,201 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 21:38:48,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:38:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:38:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:38:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:38:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021399724] [2020-12-21 21:38:48,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:38:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:38:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:38:48,626 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 19 states. [2020-12-21 21:38:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,787 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2020-12-21 21:38:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:38:48,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-21 21:38:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,789 INFO L225 Difference]: With dead ends: 149 [2020-12-21 21:38:48,789 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:38:48,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:38:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:38:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-21 21:38:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:38:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-21 21:38:48,794 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 84 [2020-12-21 21:38:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,795 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-21 21:38:48,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:38:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-21 21:38:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:38:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,796 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:38:49,011 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash -505049418, now seen corresponding path program 16 times [2020-12-21 21:38:49,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50630353] [2020-12-21 21:38:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:38:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50630353] [2020-12-21 21:38:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573167175] [2020-12-21 21:38:49,302 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 21:38:49,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:38:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:38:49,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:49,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:38:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748424819] [2020-12-21 21:38:49,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:38:49,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:38:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:38:49,543 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 20 states. [2020-12-21 21:38:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,716 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2020-12-21 21:38:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:38:49,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-21 21:38:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,718 INFO L225 Difference]: With dead ends: 157 [2020-12-21 21:38:49,718 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 21:38:49,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:38:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 21:38:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-12-21 21:38:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 21:38:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-12-21 21:38:49,724 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 89 [2020-12-21 21:38:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,724 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-12-21 21:38:49,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:38:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-12-21 21:38:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 21:38:49,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,725 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:38:49,940 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1363811855, now seen corresponding path program 17 times [2020-12-21 21:38:49,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893414061] [2020-12-21 21:38:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:38:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893414061] [2020-12-21 21:38:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229538174] [2020-12-21 21:38:50,271 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 21:38:51,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:38:51,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:38:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:38:51,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:38:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108260714] [2020-12-21 21:38:51,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:38:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:38:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:51,309 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 21 states. [2020-12-21 21:38:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:51,505 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2020-12-21 21:38:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:38:51,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-21 21:38:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:51,507 INFO L225 Difference]: With dead ends: 165 [2020-12-21 21:38:51,507 INFO L226 Difference]: Without dead ends: 105 [2020-12-21 21:38:51,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-21 21:38:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-12-21 21:38:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 21:38:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2020-12-21 21:38:51,512 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 94 [2020-12-21 21:38:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:51,513 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2020-12-21 21:38:51,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:38:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2020-12-21 21:38:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:38:51,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:51,514 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:51,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:51,725 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1955911186, now seen corresponding path program 18 times [2020-12-21 21:38:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:51,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481622073] [2020-12-21 21:38:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-21 21:38:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481622073] [2020-12-21 21:38:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410933031] [2020-12-21 21:38:52,040 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 21:38:53,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:38:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:38:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 21:38:53,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:53,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:38:53,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795834589] [2020-12-21 21:38:53,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:38:53,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:53,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:38:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:38:53,385 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand 22 states. [2020-12-21 21:38:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:53,593 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-12-21 21:38:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:38:53,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-21 21:38:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:53,596 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:38:53,596 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:38:53,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:38:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:38:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-21 21:38:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:38:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2020-12-21 21:38:53,601 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 99 [2020-12-21 21:38:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:53,601 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2020-12-21 21:38:53,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:38:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2020-12-21 21:38:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:38:53,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:53,603 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:53,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,818 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1543959189, now seen corresponding path program 19 times [2020-12-21 21:38:53,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:53,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147611481] [2020-12-21 21:38:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:38:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147611481] [2020-12-21 21:38:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574108016] [2020-12-21 21:38:54,114 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 21:38:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:38:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:38:54,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:54,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:38:54,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737189491] [2020-12-21 21:38:54,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:38:54,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:38:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:38:54,345 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand 23 states. [2020-12-21 21:38:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:54,558 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2020-12-21 21:38:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:38:54,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 104 [2020-12-21 21:38:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:54,560 INFO L225 Difference]: With dead ends: 181 [2020-12-21 21:38:54,561 INFO L226 Difference]: Without dead ends: 115 [2020-12-21 21:38:54,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:38:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-21 21:38:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-12-21 21:38:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-21 21:38:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2020-12-21 21:38:54,567 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 104 [2020-12-21 21:38:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:54,567 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2020-12-21 21:38:54,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:38:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2020-12-21 21:38:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:38:54,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:54,569 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:54,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:54,784 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 752344430, now seen corresponding path program 20 times [2020-12-21 21:38:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:54,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677836960] [2020-12-21 21:38:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:38:55,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677836960] [2020-12-21 21:38:55,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211894294] [2020-12-21 21:38:55,118 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 21:38:55,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:38:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:38:55,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:55,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:38:55,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768833162] [2020-12-21 21:38:55,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:38:55,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:38:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:38:55,385 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand 24 states. [2020-12-21 21:38:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,606 INFO L93 Difference]: Finished difference Result 189 states and 236 transitions. [2020-12-21 21:38:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:38:55,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-12-21 21:38:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,608 INFO L225 Difference]: With dead ends: 189 [2020-12-21 21:38:55,608 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 21:38:55,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:38:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 21:38:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-12-21 21:38:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:38:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-21 21:38:55,615 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 109 [2020-12-21 21:38:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,616 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-21 21:38:55,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:38:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-21 21:38:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:38:55,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,617 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:38:55,831 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1783930055, now seen corresponding path program 21 times [2020-12-21 21:38:55,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702300231] [2020-12-21 21:38:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-21 21:38:56,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702300231] [2020-12-21 21:38:56,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603150907] [2020-12-21 21:38:56,221 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 21:38:56,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-21 21:38:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-21 21:38:57,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:57,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:38:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892574615] [2020-12-21 21:38:57,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:38:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:38:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:38:57,035 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 25 states. [2020-12-21 21:38:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:57,210 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-12-21 21:38:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:38:57,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-12-21 21:38:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:57,212 INFO L225 Difference]: With dead ends: 197 [2020-12-21 21:38:57,212 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:38:57,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:38:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:38:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-12-21 21:38:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-21 21:38:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2020-12-21 21:38:57,217 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 114 [2020-12-21 21:38:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:57,218 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2020-12-21 21:38:57,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:38:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2020-12-21 21:38:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-21 21:38:57,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:57,219 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:38:57,420 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1971297078, now seen corresponding path program 22 times [2020-12-21 21:38:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387518072] [2020-12-21 21:38:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-21 21:38:57,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387518072] [2020-12-21 21:38:57,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842590403] [2020-12-21 21:38:57,830 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 21:38:57,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:57,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-21 21:38:58,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:38:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510200870] [2020-12-21 21:38:58,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:38:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:38:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:38:58,078 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand 26 states. [2020-12-21 21:38:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,304 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2020-12-21 21:38:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:38:58,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-12-21 21:38:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,305 INFO L225 Difference]: With dead ends: 205 [2020-12-21 21:38:58,305 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:38:58,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:38:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:38:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-12-21 21:38:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:38:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-21 21:38:58,311 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 119 [2020-12-21 21:38:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,312 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-21 21:38:58,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:38:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-21 21:38:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:38:58,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,313 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:58,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,526 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:58,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1494315997, now seen corresponding path program 23 times [2020-12-21 21:38:58,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:58,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122476414] [2020-12-21 21:38:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-21 21:38:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122476414] [2020-12-21 21:38:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000061161] [2020-12-21 21:38:59,000 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 21:38:59,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:38:59,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:38:59,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 21:38:59,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:59,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:38:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073530098] [2020-12-21 21:38:59,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:38:59,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:38:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:38:59,901 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 27 states. [2020-12-21 21:39:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:00,166 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2020-12-21 21:39:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:39:00,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 124 [2020-12-21 21:39:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:00,168 INFO L225 Difference]: With dead ends: 213 [2020-12-21 21:39:00,168 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 21:39:00,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:39:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 21:39:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-12-21 21:39:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 21:39:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2020-12-21 21:39:00,173 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 124 [2020-12-21 21:39:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:00,174 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2020-12-21 21:39:00,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:39:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2020-12-21 21:39:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-21 21:39:00,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:00,175 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:00,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:39:00,389 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1981797338, now seen corresponding path program 24 times [2020-12-21 21:39:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:00,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706923699] [2020-12-21 21:39:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:39:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706923699] [2020-12-21 21:39:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566823143] [2020-12-21 21:39:00,910 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 [2020-12-21 21:39:02,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:39:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:39:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:39:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:39:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188696218] [2020-12-21 21:39:02,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:39:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:39:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:39:02,306 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand 28 states. [2020-12-21 21:39:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:02,561 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2020-12-21 21:39:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:39:02,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2020-12-21 21:39:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:02,562 INFO L225 Difference]: With dead ends: 221 [2020-12-21 21:39:02,562 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:39:02,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:39:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:39:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-12-21 21:39:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 21:39:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2020-12-21 21:39:02,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 129 [2020-12-21 21:39:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:02,568 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2020-12-21 21:39:02,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:39:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2020-12-21 21:39:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-21 21:39:02,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:02,570 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,784 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash 958882945, now seen corresponding path program 25 times [2020-12-21 21:39:02,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964891718] [2020-12-21 21:39:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:39:03,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964891718] [2020-12-21 21:39:03,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527200397] [2020-12-21 21:39:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:39:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:39:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:39:03,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765954182] [2020-12-21 21:39:03,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:39:03,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:39:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:39:03,553 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 29 states. [2020-12-21 21:39:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:03,823 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2020-12-21 21:39:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:39:03,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 134 [2020-12-21 21:39:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:03,824 INFO L225 Difference]: With dead ends: 229 [2020-12-21 21:39:03,825 INFO L226 Difference]: Without dead ends: 145 [2020-12-21 21:39:03,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:39:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-21 21:39:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-12-21 21:39:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 21:39:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2020-12-21 21:39:03,830 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 134 [2020-12-21 21:39:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:03,830 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2020-12-21 21:39:03,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:39:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2020-12-21 21:39:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 21:39:03,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:03,832 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:04,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:39:04,046 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2143875970, now seen corresponding path program 26 times [2020-12-21 21:39:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:04,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920571443] [2020-12-21 21:39:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-12-21 21:39:04,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920571443] [2020-12-21 21:39:04,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487455001] [2020-12-21 21:39:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:39:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-12-21 21:39:04,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:04,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:39:04,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201022409] [2020-12-21 21:39:04,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:39:04,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:39:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:04,894 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand 30 states. [2020-12-21 21:39:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:05,190 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2020-12-21 21:39:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:39:05,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2020-12-21 21:39:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:05,191 INFO L225 Difference]: With dead ends: 237 [2020-12-21 21:39:05,191 INFO L226 Difference]: Without dead ends: 150 [2020-12-21 21:39:05,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-21 21:39:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-12-21 21:39:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 21:39:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2020-12-21 21:39:05,197 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 139 [2020-12-21 21:39:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:05,197 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2020-12-21 21:39:05,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:39:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2020-12-21 21:39:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-21 21:39:05,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:05,199 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:05,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:39:05,414 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:05,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2107935451, now seen corresponding path program 27 times [2020-12-21 21:39:05,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:05,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570612234] [2020-12-21 21:39:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-21 21:39:05,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570612234] [2020-12-21 21:39:05,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175140354] [2020-12-21 21:39:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-21 21:39:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:39:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 53 proven. 1080 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-21 21:39:08,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:08,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 33 [2020-12-21 21:39:08,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781917705] [2020-12-21 21:39:08,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:39:08,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:39:08,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:39:08,593 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand 33 states. [2020-12-21 21:39:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:08,923 INFO L93 Difference]: Finished difference Result 247 states and 310 transitions. [2020-12-21 21:39:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:39:08,923 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 144 [2020-12-21 21:39:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:08,924 INFO L225 Difference]: With dead ends: 247 [2020-12-21 21:39:08,925 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 21:39:08,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:39:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 21:39:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-21 21:39:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 21:39:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-12-21 21:39:08,930 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 144 [2020-12-21 21:39:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:08,931 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-12-21 21:39:08,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:39:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2020-12-21 21:39:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-21 21:39:08,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:08,933 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:09,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:39:09,148 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1587275209, now seen corresponding path program 28 times [2020-12-21 21:39:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:09,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862224133] [2020-12-21 21:39:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-12-21 21:39:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862224133] [2020-12-21 21:39:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721569875] [2020-12-21 21:39:09,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:09,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:39:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:39:10,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:10,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:39:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345634844] [2020-12-21 21:39:10,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:39:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:39:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:39:10,157 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 33 states. [2020-12-21 21:39:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:10,407 INFO L93 Difference]: Finished difference Result 261 states and 326 transitions. [2020-12-21 21:39:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:39:10,411 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 154 [2020-12-21 21:39:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:10,412 INFO L225 Difference]: With dead ends: 261 [2020-12-21 21:39:10,412 INFO L226 Difference]: Without dead ends: 165 [2020-12-21 21:39:10,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:39:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-21 21:39:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-12-21 21:39:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:39:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2020-12-21 21:39:10,419 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 154 [2020-12-21 21:39:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:10,419 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2020-12-21 21:39:10,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:39:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2020-12-21 21:39:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 21:39:10,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:10,421 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:10,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:10,634 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2063826374, now seen corresponding path program 29 times [2020-12-21 21:39:10,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:10,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008955419] [2020-12-21 21:39:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-12-21 21:39:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008955419] [2020-12-21 21:39:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344989173] [2020-12-21 21:39:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:13,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-21 21:39:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:39:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:39:13,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:13,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:39:13,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22312326] [2020-12-21 21:39:13,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:39:13,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:39:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:39:13,720 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand 34 states. [2020-12-21 21:39:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:14,014 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2020-12-21 21:39:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:39:14,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 159 [2020-12-21 21:39:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:14,015 INFO L225 Difference]: With dead ends: 269 [2020-12-21 21:39:14,016 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 21:39:14,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:39:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 21:39:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-12-21 21:39:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-21 21:39:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2020-12-21 21:39:14,022 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 159 [2020-12-21 21:39:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:14,022 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2020-12-21 21:39:14,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:39:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2020-12-21 21:39:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-21 21:39:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:14,024 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:14,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:39:14,239 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -111741331, now seen corresponding path program 30 times [2020-12-21 21:39:14,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:14,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562788151] [2020-12-21 21:39:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-12-21 21:39:14,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562788151] [2020-12-21 21:39:14,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874494479] [2020-12-21 21:39:14,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:19,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-21 21:39:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:39:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-12-21 21:39:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:19,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:39:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872308415] [2020-12-21 21:39:19,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:39:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:39:19,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:19,891 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 35 states. [2020-12-21 21:39:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:20,182 INFO L93 Difference]: Finished difference Result 277 states and 346 transitions. [2020-12-21 21:39:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:39:20,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 164 [2020-12-21 21:39:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:20,183 INFO L225 Difference]: With dead ends: 277 [2020-12-21 21:39:20,184 INFO L226 Difference]: Without dead ends: 175 [2020-12-21 21:39:20,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-21 21:39:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-12-21 21:39:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 21:39:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2020-12-21 21:39:20,194 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 164 [2020-12-21 21:39:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:20,194 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2020-12-21 21:39:20,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:39:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2020-12-21 21:39:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-21 21:39:20,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:20,195 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:20,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:20,409 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1268069994, now seen corresponding path program 31 times [2020-12-21 21:39:20,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:20,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524964440] [2020-12-21 21:39:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 21:39:21,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524964440] [2020-12-21 21:39:21,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580675855] [2020-12-21 21:39:21,223 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:39:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 21:39:21,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:21,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:39:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208780194] [2020-12-21 21:39:21,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:39:21,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:39:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:39:21,520 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand 36 states. [2020-12-21 21:39:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:21,888 INFO L93 Difference]: Finished difference Result 285 states and 356 transitions. [2020-12-21 21:39:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:39:21,889 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 169 [2020-12-21 21:39:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:21,890 INFO L225 Difference]: With dead ends: 285 [2020-12-21 21:39:21,890 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 21:39:21,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:39:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 21:39:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-12-21 21:39:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:39:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2020-12-21 21:39:21,899 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 169 [2020-12-21 21:39:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:21,900 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2020-12-21 21:39:21,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:39:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2020-12-21 21:39:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-21 21:39:21,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:21,901 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:22,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:39:22,116 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1552226543, now seen corresponding path program 32 times [2020-12-21 21:39:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:22,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730801889] [2020-12-21 21:39:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-21 21:39:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730801889] [2020-12-21 21:39:22,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176831108] [2020-12-21 21:39:22,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:23,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:23,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:39:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-21 21:39:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:39:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142685481] [2020-12-21 21:39:23,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:39:23,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:39:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:39:23,278 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand 37 states. [2020-12-21 21:39:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:23,662 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2020-12-21 21:39:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:39:23,665 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 174 [2020-12-21 21:39:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:23,667 INFO L225 Difference]: With dead ends: 293 [2020-12-21 21:39:23,667 INFO L226 Difference]: Without dead ends: 185 [2020-12-21 21:39:23,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:39:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-21 21:39:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-12-21 21:39:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-21 21:39:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2020-12-21 21:39:23,674 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 174 [2020-12-21 21:39:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:23,674 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2020-12-21 21:39:23,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:39:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2020-12-21 21:39:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-21 21:39:23,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:23,675 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:23,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:39:23,890 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash -760672014, now seen corresponding path program 33 times [2020-12-21 21:39:23,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:23,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335671113] [2020-12-21 21:39:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-21 21:39:24,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335671113] [2020-12-21 21:39:24,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598561961] [2020-12-21 21:39:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:36,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2020-12-21 21:39:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:39:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-21 21:39:36,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:36,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:39:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239216087] [2020-12-21 21:39:36,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:39:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:39:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:39:36,298 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand 38 states. [2020-12-21 21:39:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:36,708 INFO L93 Difference]: Finished difference Result 301 states and 376 transitions. [2020-12-21 21:39:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:39:36,709 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 179 [2020-12-21 21:39:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:36,710 INFO L225 Difference]: With dead ends: 301 [2020-12-21 21:39:36,710 INFO L226 Difference]: Without dead ends: 190 [2020-12-21 21:39:36,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:39:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-21 21:39:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-12-21 21:39:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-21 21:39:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 224 transitions. [2020-12-21 21:39:36,717 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 224 transitions. Word has length 179 [2020-12-21 21:39:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:36,718 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 224 transitions. [2020-12-21 21:39:36,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:39:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 224 transitions. [2020-12-21 21:39:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-21 21:39:36,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:36,719 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:36,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:39:36,935 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -143263819, now seen corresponding path program 34 times [2020-12-21 21:39:36,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:36,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678063797] [2020-12-21 21:39:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-21 21:39:37,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678063797] [2020-12-21 21:39:37,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395940028] [2020-12-21 21:39:37,806 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:37,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:37,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:39:37,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-21 21:39:38,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:38,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:39:38,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755693858] [2020-12-21 21:39:38,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:39:38,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:38,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:39:38,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:39:38,156 INFO L87 Difference]: Start difference. First operand 187 states and 224 transitions. Second operand 39 states. [2020-12-21 21:39:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:38,591 INFO L93 Difference]: Finished difference Result 309 states and 386 transitions. [2020-12-21 21:39:38,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:39:38,592 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2020-12-21 21:39:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:38,594 INFO L225 Difference]: With dead ends: 309 [2020-12-21 21:39:38,594 INFO L226 Difference]: Without dead ends: 195 [2020-12-21 21:39:38,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:39:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-21 21:39:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-12-21 21:39:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-21 21:39:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2020-12-21 21:39:38,601 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 184 [2020-12-21 21:39:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:38,602 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2020-12-21 21:39:38,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:39:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2020-12-21 21:39:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-21 21:39:38,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:38,603 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:38,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:39:38,817 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -754378674, now seen corresponding path program 35 times [2020-12-21 21:39:38,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:38,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791040706] [2020-12-21 21:39:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-12-21 21:39:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791040706] [2020-12-21 21:39:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162032308] [2020-12-21 21:39:39,679 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:11,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-21 21:40:11,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:40:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-12-21 21:40:11,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:11,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:40:11,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888389042] [2020-12-21 21:40:11,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:40:11,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:40:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:40:11,397 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand 40 states. [2020-12-21 21:40:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:11,817 INFO L93 Difference]: Finished difference Result 317 states and 396 transitions. [2020-12-21 21:40:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:40:11,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 189 [2020-12-21 21:40:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:11,819 INFO L225 Difference]: With dead ends: 317 [2020-12-21 21:40:11,819 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 21:40:11,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:40:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 21:40:11,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-12-21 21:40:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-21 21:40:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 236 transitions. [2020-12-21 21:40:11,825 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 236 transitions. Word has length 189 [2020-12-21 21:40:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:11,825 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 236 transitions. [2020-12-21 21:40:11,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:40:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 236 transitions. [2020-12-21 21:40:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 21:40:11,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:11,827 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:12,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:40:12,042 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash -46765991, now seen corresponding path program 36 times [2020-12-21 21:40:12,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:12,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017429203] [2020-12-21 21:40:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-12-21 21:40:13,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017429203] [2020-12-21 21:40:13,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970630235] [2020-12-21 21:40:13,141 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:29,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-21 21:40:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-21 21:40:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 73 proven. 2035 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-12-21 21:40:30,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:30,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42] total 43 [2020-12-21 21:40:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454349461] [2020-12-21 21:40:30,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:40:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:40:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:30,240 INFO L87 Difference]: Start difference. First operand 197 states and 236 transitions. Second operand 43 states. [2020-12-21 21:40:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:30,701 INFO L93 Difference]: Finished difference Result 327 states and 410 transitions. [2020-12-21 21:40:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:40:30,701 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 194 [2020-12-21 21:40:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:30,703 INFO L225 Difference]: With dead ends: 327 [2020-12-21 21:40:30,704 INFO L226 Difference]: Without dead ends: 207 [2020-12-21 21:40:30,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-21 21:40:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-21 21:40:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-21 21:40:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2020-12-21 21:40:30,712 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 194 [2020-12-21 21:40:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:30,712 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2020-12-21 21:40:30,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:40:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2020-12-21 21:40:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-21 21:40:30,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:30,714 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:30,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:40:30,915 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1311406333, now seen corresponding path program 37 times [2020-12-21 21:40:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:30,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145421867] [2020-12-21 21:40:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-12-21 21:40:32,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145421867] [2020-12-21 21:40:32,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028302466] [2020-12-21 21:40:32,131 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:32,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:40:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-12-21 21:40:32,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:32,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:40:32,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532484255] [2020-12-21 21:40:32,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:40:32,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:32,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:40:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:32,502 INFO L87 Difference]: Start difference. First operand 207 states and 248 transitions. Second operand 43 states. [2020-12-21 21:40:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:32,964 INFO L93 Difference]: Finished difference Result 341 states and 426 transitions. [2020-12-21 21:40:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:40:32,965 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 204 [2020-12-21 21:40:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:32,966 INFO L225 Difference]: With dead ends: 341 [2020-12-21 21:40:32,967 INFO L226 Difference]: Without dead ends: 215 [2020-12-21 21:40:32,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-21 21:40:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-12-21 21:40:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-21 21:40:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 254 transitions. [2020-12-21 21:40:32,975 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 254 transitions. Word has length 204 [2020-12-21 21:40:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:32,975 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 254 transitions. [2020-12-21 21:40:32,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:40:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 254 transitions. [2020-12-21 21:40:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-21 21:40:32,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:32,977 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:33,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:40:33,192 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1510643962, now seen corresponding path program 38 times [2020-12-21 21:40:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:33,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723505663] [2020-12-21 21:40:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-12-21 21:40:34,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723505663] [2020-12-21 21:40:34,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099684597] [2020-12-21 21:40:34,468 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:34,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:40:34,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:40:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-12-21 21:40:34,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:34,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:40:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940156149] [2020-12-21 21:40:34,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:40:34,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:40:34,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:40:34,873 INFO L87 Difference]: Start difference. First operand 212 states and 254 transitions. Second operand 44 states. [2020-12-21 21:40:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:35,360 INFO L93 Difference]: Finished difference Result 349 states and 436 transitions. [2020-12-21 21:40:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:40:35,360 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 209 [2020-12-21 21:40:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:35,361 INFO L225 Difference]: With dead ends: 349 [2020-12-21 21:40:35,362 INFO L226 Difference]: Without dead ends: 220 [2020-12-21 21:40:35,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:40:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-21 21:40:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-12-21 21:40:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-21 21:40:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 260 transitions. [2020-12-21 21:40:35,369 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 260 transitions. Word has length 209 [2020-12-21 21:40:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:35,370 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 260 transitions. [2020-12-21 21:40:35,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:40:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 260 transitions. [2020-12-21 21:40:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-21 21:40:35,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:35,371 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:35,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:40:35,586 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash 960522657, now seen corresponding path program 39 times [2020-12-21 21:40:35,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:35,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224128747] [2020-12-21 21:40:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-12-21 21:40:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224128747] [2020-12-21 21:40:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218711972] [2020-12-21 21:40:36,882 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:07,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-12-21 21:41:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:41:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-21 21:41:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:41:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-12-21 21:41:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:41:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:41:07,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866509496] [2020-12-21 21:41:07,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:41:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:41:07,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:41:07,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:41:07,899 INFO L87 Difference]: Start difference. First operand 217 states and 260 transitions. Second operand 45 states. [2020-12-21 21:41:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:41:08,494 INFO L93 Difference]: Finished difference Result 357 states and 446 transitions. [2020-12-21 21:41:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:41:08,495 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 214 [2020-12-21 21:41:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:41:08,496 INFO L225 Difference]: With dead ends: 357 [2020-12-21 21:41:08,496 INFO L226 Difference]: Without dead ends: 225 [2020-12-21 21:41:08,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:41:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-21 21:41:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-21 21:41:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-21 21:41:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2020-12-21 21:41:08,504 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 214 [2020-12-21 21:41:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:41:08,505 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2020-12-21 21:41:08,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:41:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2020-12-21 21:41:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-21 21:41:08,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:41:08,507 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:41:08,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:08,722 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:41:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:41:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1369779810, now seen corresponding path program 40 times [2020-12-21 21:41:08,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:41:08,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270626907] [2020-12-21 21:41:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:41:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:41:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-12-21 21:41:10,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270626907] [2020-12-21 21:41:10,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852938200] [2020-12-21 21:41:10,107 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:10,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:41:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:41:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:41:10,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:41:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-12-21 21:41:10,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:41:10,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:41:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458225036] [2020-12-21 21:41:10,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:41:10,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:41:10,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:41:10,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:41:10,511 INFO L87 Difference]: Start difference. First operand 222 states and 266 transitions. Second operand 46 states. [2020-12-21 21:41:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:41:11,064 INFO L93 Difference]: Finished difference Result 365 states and 456 transitions. [2020-12-21 21:41:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:41:11,064 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2020-12-21 21:41:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:41:11,066 INFO L225 Difference]: With dead ends: 365 [2020-12-21 21:41:11,066 INFO L226 Difference]: Without dead ends: 230 [2020-12-21 21:41:11,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:41:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-21 21:41:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-12-21 21:41:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-21 21:41:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2020-12-21 21:41:11,073 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 219 [2020-12-21 21:41:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:41:11,074 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2020-12-21 21:41:11,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:41:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2020-12-21 21:41:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-21 21:41:11,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:41:11,075 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:41:11,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:11,289 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:41:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:41:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash -421103035, now seen corresponding path program 41 times [2020-12-21 21:41:11,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:41:11,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746044417] [2020-12-21 21:41:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:41:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:41:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-12-21 21:41:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746044417] [2020-12-21 21:41:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865028578] [2020-12-21 21:41:12,687 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:11,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2020-12-21 21:42:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:42:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-12-21 21:42:11,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:11,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:42:11,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265328254] [2020-12-21 21:42:11,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:42:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:42:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:42:11,399 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand 47 states. [2020-12-21 21:42:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:11,974 INFO L93 Difference]: Finished difference Result 373 states and 466 transitions. [2020-12-21 21:42:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:42:11,974 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 224 [2020-12-21 21:42:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:11,976 INFO L225 Difference]: With dead ends: 373 [2020-12-21 21:42:11,976 INFO L226 Difference]: Without dead ends: 235 [2020-12-21 21:42:11,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:42:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-21 21:42:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-12-21 21:42:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-21 21:42:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 278 transitions. [2020-12-21 21:42:11,984 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 278 transitions. Word has length 224 [2020-12-21 21:42:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:11,984 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 278 transitions. [2020-12-21 21:42:11,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:42:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 278 transitions. [2020-12-21 21:42:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-21 21:42:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:11,986 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:12,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-21 21:42:12,202 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:12,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1237169598, now seen corresponding path program 42 times [2020-12-21 21:42:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:12,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271416524] [2020-12-21 21:42:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [2020-12-21 21:42:13,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271416524] [2020-12-21 21:42:13,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123276247] [2020-12-21 21:42:13,710 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:49,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2020-12-21 21:42:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:42:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-12-21 21:42:49,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:49,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-21 21:42:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502846219] [2020-12-21 21:42:49,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:42:49,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:42:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:42:49,803 INFO L87 Difference]: Start difference. First operand 232 states and 278 transitions. Second operand 48 states. [2020-12-21 21:42:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:50,293 INFO L93 Difference]: Finished difference Result 381 states and 476 transitions. [2020-12-21 21:42:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:42:50,294 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 229 [2020-12-21 21:42:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:50,296 INFO L225 Difference]: With dead ends: 381 [2020-12-21 21:42:50,297 INFO L226 Difference]: Without dead ends: 240 [2020-12-21 21:42:50,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:42:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-21 21:42:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-12-21 21:42:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-21 21:42:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2020-12-21 21:42:50,305 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 229 [2020-12-21 21:42:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:50,305 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2020-12-21 21:42:50,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:42:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2020-12-21 21:42:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-21 21:42:50,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:50,307 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:50,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:50,508 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2097867497, now seen corresponding path program 43 times [2020-12-21 21:42:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:50,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079868408] [2020-12-21 21:42:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2020-12-21 21:42:52,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079868408] [2020-12-21 21:42:52,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172366091] [2020-12-21 21:42:52,022 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:42:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2020-12-21 21:42:52,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:52,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:42:52,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131617454] [2020-12-21 21:42:52,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:42:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:42:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:42:52,477 INFO L87 Difference]: Start difference. First operand 237 states and 284 transitions. Second operand 49 states. [2020-12-21 21:42:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:53,124 INFO L93 Difference]: Finished difference Result 389 states and 486 transitions. [2020-12-21 21:42:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:42:53,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 234 [2020-12-21 21:42:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:53,126 INFO L225 Difference]: With dead ends: 389 [2020-12-21 21:42:53,126 INFO L226 Difference]: Without dead ends: 245 [2020-12-21 21:42:53,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:42:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-21 21:42:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-12-21 21:42:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-21 21:42:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 290 transitions. [2020-12-21 21:42:53,140 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 290 transitions. Word has length 234 [2020-12-21 21:42:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:53,141 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 290 transitions. [2020-12-21 21:42:53,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:42:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 290 transitions. [2020-12-21 21:42:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-21 21:42:53,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:53,142 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:53,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:53,358 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1676624614, now seen corresponding path program 44 times [2020-12-21 21:42:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:53,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216870909] [2020-12-21 21:42:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2020-12-21 21:42:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216870909] [2020-12-21 21:42:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383356291] [2020-12-21 21:42:54,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:55,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:42:55,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:42:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2020-12-21 21:42:55,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:55,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-21 21:42:55,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587400363] [2020-12-21 21:42:55,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:42:55,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:55,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:42:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:42:55,463 INFO L87 Difference]: Start difference. First operand 242 states and 290 transitions. Second operand 50 states. [2020-12-21 21:42:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:56,109 INFO L93 Difference]: Finished difference Result 397 states and 496 transitions. [2020-12-21 21:42:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:42:56,109 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 239 [2020-12-21 21:42:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:56,111 INFO L225 Difference]: With dead ends: 397 [2020-12-21 21:42:56,111 INFO L226 Difference]: Without dead ends: 250 [2020-12-21 21:42:56,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:42:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-21 21:42:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-12-21 21:42:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 21:42:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 296 transitions. [2020-12-21 21:42:56,119 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 296 transitions. Word has length 239 [2020-12-21 21:42:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:56,119 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 296 transitions. [2020-12-21 21:42:56,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:42:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 296 transitions. [2020-12-21 21:42:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-21 21:42:56,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:56,121 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:56,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:42:56,337 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1125907341, now seen corresponding path program 45 times [2020-12-21 21:42:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:56,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734975992] [2020-12-21 21:42:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat