/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-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:48:37,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:48:37,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:48:37,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:48:37,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:48:38,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:48:38,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:48:38,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:48:38,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:48:38,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:48:38,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:48:38,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:48:38,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:48:38,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:48:38,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:48:38,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:48:38,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:48:38,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:48:38,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:48:38,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:48:38,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:48:38,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:48:38,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:48:38,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:48:38,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:48:38,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:48:38,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:48:38,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:48:38,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:48:38,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:48:38,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:48:38,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:48:38,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:48:38,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:48:38,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:48:38,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:48:38,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:48:38,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:48:38,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:48:38,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:48:38,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:48:38,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:48:38,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:48:38,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:48:38,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:48:38,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:48:38,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:38,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:48:38,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:48:38,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:48:38,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:48:38,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:48:38,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:48:38,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:48:38,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:48:38,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:48:38,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:48:38,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:48:38,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:48:38,631 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:48:38,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-12-21 21:48:38,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f55c597/d049b8d210684720ad838827ed87a4d4/FLAG9a17f3cc6 [2020-12-21 21:48:39,426 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:48:39,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-12-21 21:48:39,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f55c597/d049b8d210684720ad838827ed87a4d4/FLAG9a17f3cc6 [2020-12-21 21:48:39,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f55c597/d049b8d210684720ad838827ed87a4d4 [2020-12-21 21:48:39,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:48:39,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:48:39,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:39,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:48:39,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:48:39,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:39" (1/1) ... [2020-12-21 21:48:39,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cc0a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:39, skipping insertion in model container [2020-12-21 21:48:39,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:39" (1/1) ... [2020-12-21 21:48:39,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:48:39,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:48:39,962 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-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2020-12-21 21:48:39,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:39,991 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:48:40,005 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-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2020-12-21 21:48:40,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:40,034 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:48:40,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40 WrapperNode [2020-12-21 21:48:40,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:40,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:40,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:48:40,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:48:40,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:40,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:48:40,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:48:40,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:48:40,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (1/1) ... [2020-12-21 21:48:40,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:48:40,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:48:40,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:48:40,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:48:40,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (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 21:48:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:48:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:48:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:48:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:48:40,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:48:40,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:48:40,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:48:40,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:48:40,569 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:48:40,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:40 BoogieIcfgContainer [2020-12-21 21:48:40,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:48:40,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:48:40,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:48:40,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:48:40,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:39" (1/3) ... [2020-12-21 21:48:40,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d236a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:40, skipping insertion in model container [2020-12-21 21:48:40,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:40" (2/3) ... [2020-12-21 21:48:40,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d236a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:40, skipping insertion in model container [2020-12-21 21:48:40,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:40" (3/3) ... [2020-12-21 21:48:40,587 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2020-12-21 21:48:40,596 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:48:40,603 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:48:40,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:48:40,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:48:40,669 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:48:40,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:48:40,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:48:40,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:48:40,670 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:48:40,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:48:40,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:48:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-21 21:48:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:40,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:40,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:40,727 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2020-12-21 21:48:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:40,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593954567] [2020-12-21 21:48:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:40,974 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 21:48:40,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593954567] [2020-12-21 21:48:40,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:40,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:48:40,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542120907] [2020-12-21 21:48:40,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:48:40,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:48:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:41,011 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-21 21:48:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:41,033 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-21 21:48:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:48:41,035 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 21:48:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:41,054 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:48:41,054 INFO L226 Difference]: Without dead ends: 16 [2020-12-21 21:48:41,061 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 21:48:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-21 21:48:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-21 21:48:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:48:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2020-12-21 21:48:41,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2020-12-21 21:48:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:41,106 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2020-12-21 21:48:41,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:48:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-12-21 21:48:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:41,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:41,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:41,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:48:41,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2020-12-21 21:48:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:41,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408160835] [2020-12-21 21:48:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:41,234 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 21:48:41,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408160835] [2020-12-21 21:48:41,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:41,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:48:41,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746284382] [2020-12-21 21:48:41,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:48:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:48:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:41,243 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand 3 states. [2020-12-21 21:48:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:41,330 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-12-21 21:48:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:48:41,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:48:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:41,331 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:48:41,332 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:48:41,333 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 21:48:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:48:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-21 21:48:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:48:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 21:48:41,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2020-12-21 21:48:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:41,339 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 21:48:41,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:48:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 21:48:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:48:41,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:41,341 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:48:41,341 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2020-12-21 21:48:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:41,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826694570] [2020-12-21 21:48:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:48:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826694570] [2020-12-21 21:48:41,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895719759] [2020-12-21 21:48:41,411 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 21:48:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:48:41,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:48:41,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:41,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:48:41,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064988514] [2020-12-21 21:48:41,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:41,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:41,560 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-12-21 21:48:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:41,653 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-21 21:48:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:48:41,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 21:48:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:41,658 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:48:41,658 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 21:48:41,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 21:48:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 21:48:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-21 21:48:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:48:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-12-21 21:48:41,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2020-12-21 21:48:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:41,671 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-12-21 21:48:41,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-12-21 21:48:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:48:41,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:41,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:41,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:48:41,889 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1069426978, now seen corresponding path program 2 times [2020-12-21 21:48:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:41,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610579484] [2020-12-21 21:48:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:48:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610579484] [2020-12-21 21:48:42,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716242369] [2020-12-21 21:48:42,056 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 21:48:42,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:48:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:48:42,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:42,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:48:42,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110660733] [2020-12-21 21:48:42,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:48:42,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:48:42,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:42,214 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-12-21 21:48:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:42,330 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-12-21 21:48:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:48:42,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-21 21:48:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:42,334 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:48:42,335 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:48:42,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 21:48:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:48:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-12-21 21:48:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:48:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-12-21 21:48:42,351 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 24 [2020-12-21 21:48:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-12-21 21:48:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:48:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-12-21 21:48:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:48:42,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:42,356 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:42,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:42,572 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash 879812426, now seen corresponding path program 3 times [2020-12-21 21:48:42,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:42,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053027599] [2020-12-21 21:48:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:48:42,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053027599] [2020-12-21 21:48:42,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016663630] [2020-12-21 21:48:42,688 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 21:48:42,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:48:42,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:42,787 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 21:48:42,790 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:42,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:42,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:48:42,794 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-12-21 21:48:42,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:48:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:48:42,854 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2020-12-21 21:48:42,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:42,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:42,911 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2020-12-21 21:48:42,913 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:42,923 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2020-12-21 21:48:42,924 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:42,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:42,970 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2020-12-21 21:48:42,970 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:158, output treesize:107 [2020-12-21 21:48:43,061 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-21 21:48:43,486 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 10 [2020-12-21 21:48:43,490 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:43,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:43,575 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 12 [2020-12-21 21:48:43,582 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:43,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:43,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 16 [2020-12-21 21:48:43,653 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-21 21:48:43,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:48:43,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 19 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:48:43,707 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 22 variables, input treesize:217, output treesize:3 [2020-12-21 21:48:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:48:43,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:43,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:48:43,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176799980] [2020-12-21 21:48:43,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:43,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:43,738 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 9 states. [2020-12-21 21:48:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:44,706 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-12-21 21:48:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:48:44,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-21 21:48:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:44,712 INFO L225 Difference]: With dead ends: 102 [2020-12-21 21:48:44,713 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:48:44,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:48:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:48:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2020-12-21 21:48:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:48:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-12-21 21:48:44,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 32 [2020-12-21 21:48:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:44,738 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-12-21 21:48:44,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-12-21 21:48:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:48:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:44,740 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:44,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:44,958 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:44,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541918, now seen corresponding path program 1 times [2020-12-21 21:48:44,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:44,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307292423] [2020-12-21 21:48:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-21 21:48:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307292423] [2020-12-21 21:48:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571566874] [2020-12-21 21:48:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-21 21:48:45,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:45,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:48:45,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531320199] [2020-12-21 21:48:45,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:48:45,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:48:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:45,183 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2020-12-21 21:48:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:45,297 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-21 21:48:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:48:45,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-12-21 21:48:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:45,299 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:48:45,299 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:48:45,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 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 21:48:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:48:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-12-21 21:48:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:48:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-12-21 21:48:45,307 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 40 [2020-12-21 21:48:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:45,307 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-12-21 21:48:45,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:48:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-12-21 21:48:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:48:45,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:45,309 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:45,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:45,524 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash 118526412, now seen corresponding path program 2 times [2020-12-21 21:48:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004707829] [2020-12-21 21:48:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:48:45,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004707829] [2020-12-21 21:48:45,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917446200] [2020-12-21 21:48:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:45,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:45,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:48:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:48:45,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:45,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:48:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236399110] [2020-12-21 21:48:45,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:45,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:45,782 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2020-12-21 21:48:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:45,948 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-12-21 21:48:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:48:45,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-21 21:48:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:45,949 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:48:45,950 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:48:45,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:48:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-12-21 21:48:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:48:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-12-21 21:48:45,958 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 48 [2020-12-21 21:48:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:45,958 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-12-21 21:48:45,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-12-21 21:48:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:48:45,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:45,961 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:46,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:48:46,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1453858974, now seen corresponding path program 3 times [2020-12-21 21:48:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:46,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638777143] [2020-12-21 21:48:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 21:48:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638777143] [2020-12-21 21:48:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558771816] [2020-12-21 21:48:46,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:48:46,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:48:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:48:46,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:46,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:48:46,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104555664] [2020-12-21 21:48:46,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:48:46,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:46,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:48:46,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:46,538 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 10 states. [2020-12-21 21:48:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:46,683 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-12-21 21:48:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:48:46,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-21 21:48:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:46,685 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:48:46,685 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:48:46,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 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 21:48:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:48:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-12-21 21:48:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:48:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-12-21 21:48:46,700 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 56 [2020-12-21 21:48:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:46,701 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-12-21 21:48:46,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:48:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-12-21 21:48:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:48:46,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:46,702 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:46,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:46,913 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1210542604, now seen corresponding path program 4 times [2020-12-21 21:48:46,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:46,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086041458] [2020-12-21 21:48:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-21 21:48:47,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086041458] [2020-12-21 21:48:47,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710333646] [2020-12-21 21:48:47,079 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 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 21:48:47,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:48:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-21 21:48:47,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:47,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:48:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345586141] [2020-12-21 21:48:47,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:48:47,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:47,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:48:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:47,286 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 11 states. [2020-12-21 21:48:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:47,466 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-12-21 21:48:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:48:47,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-12-21 21:48:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:47,469 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:48:47,469 INFO L226 Difference]: Without dead ends: 106 [2020-12-21 21:48:47,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 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 21:48:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-21 21:48:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2020-12-21 21:48:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:48:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-12-21 21:48:47,488 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 64 [2020-12-21 21:48:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:47,491 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-12-21 21:48:47,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:48:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-12-21 21:48:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 21:48:47,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:47,493 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:47,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:47,709 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash 250261282, now seen corresponding path program 5 times [2020-12-21 21:48:47,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:47,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380178574] [2020-12-21 21:48:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:48:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380178574] [2020-12-21 21:48:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852918269] [2020-12-21 21:48:47,849 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 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 21:48:47,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 21:48:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:48:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-21 21:48:48,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:48,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:48:48,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488778794] [2020-12-21 21:48:48,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:48:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:48:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:48:48,074 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 12 states. [2020-12-21 21:48:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:48,262 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-12-21 21:48:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:48:48,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-12-21 21:48:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:48,264 INFO L225 Difference]: With dead ends: 148 [2020-12-21 21:48:48,264 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 21:48:48,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 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 21:48:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 21:48:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-12-21 21:48:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:48:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-12-21 21:48:48,277 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 72 [2020-12-21 21:48:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:48,278 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-12-21 21:48:48,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:48:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-12-21 21:48:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:48:48,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:48,285 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:48,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:48:48,501 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1756294580, now seen corresponding path program 6 times [2020-12-21 21:48:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:48,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353687709] [2020-12-21 21:48:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-21 21:48:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353687709] [2020-12-21 21:48:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967190998] [2020-12-21 21:48:48,654 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 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 21:48:48,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-21 21:48:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:48:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-21 21:48:48,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:48,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:48:48,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486697203] [2020-12-21 21:48:48,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:48:48,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:48:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:48:48,977 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 13 states. [2020-12-21 21:48:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:49,164 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2020-12-21 21:48:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:48:49,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-12-21 21:48:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:49,168 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:48:49,168 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:48:49,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 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 21:48:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:48:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-12-21 21:48:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-21 21:48:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2020-12-21 21:48:49,179 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 80 [2020-12-21 21:48:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:49,180 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2020-12-21 21:48:49,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:48:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2020-12-21 21:48:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:48:49,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:49,183 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:49,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:49,397 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 714649314, now seen corresponding path program 7 times [2020-12-21 21:48:49,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:49,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853504489] [2020-12-21 21:48:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-21 21:48:49,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853504489] [2020-12-21 21:48:49,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123274322] [2020-12-21 21:48:49,561 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 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 21:48:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:48:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-21 21:48:49,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:49,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:48:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338725888] [2020-12-21 21:48:49,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:48:49,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:48:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:48:49,733 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 14 states. [2020-12-21 21:48:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:49,935 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2020-12-21 21:48:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:48:49,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-12-21 21:48:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:49,936 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:48:49,936 INFO L226 Difference]: Without dead ends: 139 [2020-12-21 21:48:49,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:48:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-21 21:48:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-12-21 21:48:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-21 21:48:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2020-12-21 21:48:49,943 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 88 [2020-12-21 21:48:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:49,943 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2020-12-21 21:48:49,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:48:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2020-12-21 21:48:49,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:48:49,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:49,944 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:50,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:50,159 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash -483292532, now seen corresponding path program 8 times [2020-12-21 21:48:50,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:50,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616099439] [2020-12-21 21:48:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 21:48:50,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616099439] [2020-12-21 21:48:50,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755668630] [2020-12-21 21:48:50,351 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 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 21:48:50,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:48:50,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 21:48:50,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:50,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:48:50,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185267654] [2020-12-21 21:48:50,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:48:50,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:48:50,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:48:50,554 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 15 states. [2020-12-21 21:48:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:50,784 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2020-12-21 21:48:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:48:50,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-12-21 21:48:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:50,785 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:48:50,786 INFO L226 Difference]: Without dead ends: 150 [2020-12-21 21:48:50,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 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 21:48:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-21 21:48:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2020-12-21 21:48:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 21:48:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2020-12-21 21:48:50,792 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 96 [2020-12-21 21:48:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:50,793 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2020-12-21 21:48:50,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:48:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2020-12-21 21:48:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:48:50,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:50,794 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:51,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:48:51,010 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash 457039522, now seen corresponding path program 9 times [2020-12-21 21:48:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:51,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923512632] [2020-12-21 21:48:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-21 21:48:51,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923512632] [2020-12-21 21:48:51,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703206125] [2020-12-21 21:48:51,188 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 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 21:48:51,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:48:51,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:48:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-21 21:48:51,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:51,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:48:51,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655514804] [2020-12-21 21:48:51,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:48:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:48:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:48:51,503 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2020-12-21 21:48:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:51,781 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2020-12-21 21:48:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:48:51,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-12-21 21:48:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:51,783 INFO L225 Difference]: With dead ends: 204 [2020-12-21 21:48:51,783 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 21:48:51,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 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 21:48:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 21:48:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2020-12-21 21:48:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:48:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2020-12-21 21:48:51,789 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 104 [2020-12-21 21:48:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:51,789 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2020-12-21 21:48:51,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:48:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2020-12-21 21:48:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:48:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:51,790 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:52,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:48:52,005 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1888693556, now seen corresponding path program 10 times [2020-12-21 21:48:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:52,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419847394] [2020-12-21 21:48:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-21 21:48:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419847394] [2020-12-21 21:48:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586308486] [2020-12-21 21:48:52,216 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 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 21:48:52,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:48:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-21 21:48:52,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:52,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:48:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568652564] [2020-12-21 21:48:52,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:48:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:48:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:48:52,548 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 17 states. [2020-12-21 21:48:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:52,850 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2020-12-21 21:48:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:48:52,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-12-21 21:48:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:52,852 INFO L225 Difference]: With dead ends: 218 [2020-12-21 21:48:52,853 INFO L226 Difference]: Without dead ends: 172 [2020-12-21 21:48:52,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 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 21:48:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-21 21:48:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-12-21 21:48:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:48:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2020-12-21 21:48:52,864 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 112 [2020-12-21 21:48:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:52,864 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2020-12-21 21:48:52,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:48:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2020-12-21 21:48:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-21 21:48:52,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:52,869 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:53,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:48:53,082 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1790328418, now seen corresponding path program 11 times [2020-12-21 21:48:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:53,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903373745] [2020-12-21 21:48:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-21 21:48:53,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903373745] [2020-12-21 21:48:53,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131997243] [2020-12-21 21:48:53,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:53,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-21 21:48:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:48:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-12-21 21:48:53,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:53,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:48:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588411276] [2020-12-21 21:48:53,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:48:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:48:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:48:53,691 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 18 states. [2020-12-21 21:48:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:53,968 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2020-12-21 21:48:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:48:53,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-12-21 21:48:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:53,970 INFO L225 Difference]: With dead ends: 232 [2020-12-21 21:48:53,970 INFO L226 Difference]: Without dead ends: 183 [2020-12-21 21:48:53,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 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 21:48:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-21 21:48:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2020-12-21 21:48:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-21 21:48:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 222 transitions. [2020-12-21 21:48:53,977 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 222 transitions. Word has length 120 [2020-12-21 21:48:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:53,977 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 222 transitions. [2020-12-21 21:48:53,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:48:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 222 transitions. [2020-12-21 21:48:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-21 21:48:53,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:53,979 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:54,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:54,193 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1264129268, now seen corresponding path program 12 times [2020-12-21 21:48:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:54,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280326214] [2020-12-21 21:48:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-21 21:48:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280326214] [2020-12-21 21:48:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201622054] [2020-12-21 21:48:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:54,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-21 21:48:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:48:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-21 21:48:54,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:54,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:48:54,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559313602] [2020-12-21 21:48:54,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:48:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:48:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:48:54,917 INFO L87 Difference]: Start difference. First operand 175 states and 222 transitions. Second operand 19 states. [2020-12-21 21:48:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:55,241 INFO L93 Difference]: Finished difference Result 246 states and 302 transitions. [2020-12-21 21:48:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:48:55,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-12-21 21:48:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:55,246 INFO L225 Difference]: With dead ends: 246 [2020-12-21 21:48:55,246 INFO L226 Difference]: Without dead ends: 194 [2020-12-21 21:48:55,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 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 21:48:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-21 21:48:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2020-12-21 21:48:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-21 21:48:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2020-12-21 21:48:55,257 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 128 [2020-12-21 21:48:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:55,257 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2020-12-21 21:48:55,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:48:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2020-12-21 21:48:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:48:55,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:55,259 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:55,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:48:55,473 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -841101790, now seen corresponding path program 13 times [2020-12-21 21:48:55,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:55,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561310987] [2020-12-21 21:48:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-21 21:48:55,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561310987] [2020-12-21 21:48:55,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867012778] [2020-12-21 21:48:55,756 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 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 21:48:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:48:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-21 21:48:56,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:56,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:48:56,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235030445] [2020-12-21 21:48:56,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:48:56,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:48:56,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:48:56,055 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand 20 states. [2020-12-21 21:48:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:56,443 INFO L93 Difference]: Finished difference Result 260 states and 319 transitions. [2020-12-21 21:48:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:48:56,443 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-12-21 21:48:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:56,445 INFO L225 Difference]: With dead ends: 260 [2020-12-21 21:48:56,445 INFO L226 Difference]: Without dead ends: 205 [2020-12-21 21:48:56,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:48:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-21 21:48:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2020-12-21 21:48:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-21 21:48:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2020-12-21 21:48:56,453 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 136 [2020-12-21 21:48:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:56,454 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2020-12-21 21:48:56,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:48:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2020-12-21 21:48:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-21 21:48:56,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:56,456 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:48:56,670 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1619252044, now seen corresponding path program 14 times [2020-12-21 21:48:56,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:56,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005317377] [2020-12-21 21:48:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-21 21:48:56,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005317377] [2020-12-21 21:48:56,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46831042] [2020-12-21 21:48:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:57,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:48:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-21 21:48:57,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:57,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:48:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383038825] [2020-12-21 21:48:57,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:48:57,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:57,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:48:57,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:48:57,275 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 21 states. [2020-12-21 21:48:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:57,644 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2020-12-21 21:48:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:48:57,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-12-21 21:48:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:57,646 INFO L225 Difference]: With dead ends: 274 [2020-12-21 21:48:57,646 INFO L226 Difference]: Without dead ends: 216 [2020-12-21 21:48:57,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 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 21:48:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-21 21:48:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2020-12-21 21:48:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-21 21:48:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2020-12-21 21:48:57,654 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 144 [2020-12-21 21:48:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2020-12-21 21:48:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:48:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2020-12-21 21:48:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-21 21:48:57,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:57,656 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:57,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash -460288542, now seen corresponding path program 15 times [2020-12-21 21:48:57,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:57,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660192145] [2020-12-21 21:48:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-21 21:48:58,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660192145] [2020-12-21 21:48:58,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281114883] [2020-12-21 21:48:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-21 21:48:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:48:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-21 21:48:59,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:59,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:48:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751879839] [2020-12-21 21:48:59,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:48:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:48:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:48:59,275 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand 22 states. [2020-12-21 21:48:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:59,646 INFO L93 Difference]: Finished difference Result 288 states and 353 transitions. [2020-12-21 21:48:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:48:59,647 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2020-12-21 21:48:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:59,649 INFO L225 Difference]: With dead ends: 288 [2020-12-21 21:48:59,649 INFO L226 Difference]: Without dead ends: 227 [2020-12-21 21:48:59,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 152 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 21:48:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-21 21:48:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2020-12-21 21:48:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-21 21:48:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 278 transitions. [2020-12-21 21:48:59,657 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 278 transitions. Word has length 152 [2020-12-21 21:48:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 278 transitions. [2020-12-21 21:48:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:48:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 278 transitions. [2020-12-21 21:48:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-21 21:48:59,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:59,660 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:59,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:59,874 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash -710440052, now seen corresponding path program 16 times [2020-12-21 21:48:59,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:59,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052077002] [2020-12-21 21:48:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-21 21:49:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052077002] [2020-12-21 21:49:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081523499] [2020-12-21 21:49:00,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:00,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:49:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:49:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-21 21:49:00,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:00,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:49:00,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59546440] [2020-12-21 21:49:00,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:49:00,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:49:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:49:00,507 INFO L87 Difference]: Start difference. First operand 219 states and 278 transitions. Second operand 23 states. [2020-12-21 21:49:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:00,908 INFO L93 Difference]: Finished difference Result 302 states and 370 transitions. [2020-12-21 21:49:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:49:00,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-12-21 21:49:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:00,911 INFO L225 Difference]: With dead ends: 302 [2020-12-21 21:49:00,911 INFO L226 Difference]: Without dead ends: 238 [2020-12-21 21:49:00,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 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 21:49:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-21 21:49:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2020-12-21 21:49:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-21 21:49:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2020-12-21 21:49:00,920 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 160 [2020-12-21 21:49:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:00,921 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2020-12-21 21:49:00,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:49:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2020-12-21 21:49:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-21 21:49:00,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:00,923 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:01,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:01,139 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash -106267230, now seen corresponding path program 17 times [2020-12-21 21:49:01,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:01,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695724534] [2020-12-21 21:49:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-21 21:49:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695724534] [2020-12-21 21:49:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122278880] [2020-12-21 21:49:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:02,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 21:49:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:49:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-12-21 21:49:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:49:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39801719] [2020-12-21 21:49:02,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:49:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:49:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:49:02,187 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand 24 states. [2020-12-21 21:49:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:02,577 INFO L93 Difference]: Finished difference Result 316 states and 387 transitions. [2020-12-21 21:49:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:49:02,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2020-12-21 21:49:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:02,579 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:49:02,579 INFO L226 Difference]: Without dead ends: 249 [2020-12-21 21:49:02,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 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 21:49:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-21 21:49:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2020-12-21 21:49:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-21 21:49:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 306 transitions. [2020-12-21 21:49:02,587 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 306 transitions. Word has length 168 [2020-12-21 21:49:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:02,588 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 306 transitions. [2020-12-21 21:49:02,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:49:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 306 transitions. [2020-12-21 21:49:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 21:49:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:02,590 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:02,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:49:02,804 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -877259828, now seen corresponding path program 18 times [2020-12-21 21:49:02,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:02,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965312074] [2020-12-21 21:49:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-21 21:49:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965312074] [2020-12-21 21:49:03,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385286467] [2020-12-21 21:49:03,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:06,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-21 21:49:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:49:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-21 21:49:06,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:06,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:49:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948623884] [2020-12-21 21:49:06,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:49:06,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:49:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:49:06,758 INFO L87 Difference]: Start difference. First operand 241 states and 306 transitions. Second operand 25 states. [2020-12-21 21:49:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:07,230 INFO L93 Difference]: Finished difference Result 330 states and 404 transitions. [2020-12-21 21:49:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:49:07,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2020-12-21 21:49:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:07,233 INFO L225 Difference]: With dead ends: 330 [2020-12-21 21:49:07,233 INFO L226 Difference]: Without dead ends: 260 [2020-12-21 21:49:07,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:49:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-21 21:49:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2020-12-21 21:49:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-21 21:49:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2020-12-21 21:49:07,242 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 176 [2020-12-21 21:49:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:07,243 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2020-12-21 21:49:07,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:49:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2020-12-21 21:49:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-21 21:49:07,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:07,245 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:07,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:49:07,460 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1022911134, now seen corresponding path program 19 times [2020-12-21 21:49:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:07,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077830668] [2020-12-21 21:49:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-21 21:49:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077830668] [2020-12-21 21:49:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981597922] [2020-12-21 21:49:07,930 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 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 21:49:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:49:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-21 21:49:08,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:08,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:49:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119095282] [2020-12-21 21:49:08,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:49:08,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:49:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:49:08,247 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand 26 states. [2020-12-21 21:49:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:08,694 INFO L93 Difference]: Finished difference Result 344 states and 421 transitions. [2020-12-21 21:49:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:49:08,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2020-12-21 21:49:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:08,696 INFO L225 Difference]: With dead ends: 344 [2020-12-21 21:49:08,696 INFO L226 Difference]: Without dead ends: 271 [2020-12-21 21:49:08,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 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 21:49:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-21 21:49:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2020-12-21 21:49:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-21 21:49:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2020-12-21 21:49:08,708 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 184 [2020-12-21 21:49:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:08,709 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2020-12-21 21:49:08,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:49:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2020-12-21 21:49:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-21 21:49:08,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:08,713 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:08,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:08,928 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1353487348, now seen corresponding path program 20 times [2020-12-21 21:49:08,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:08,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137286833] [2020-12-21 21:49:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-21 21:49:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137286833] [2020-12-21 21:49:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215034250] [2020-12-21 21:49:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:09,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:49:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:49:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-21 21:49:09,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:09,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:49:09,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089921097] [2020-12-21 21:49:09,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:49:09,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:49:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:49:09,775 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand 27 states. [2020-12-21 21:49:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:10,279 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2020-12-21 21:49:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:49:10,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2020-12-21 21:49:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:10,282 INFO L225 Difference]: With dead ends: 358 [2020-12-21 21:49:10,282 INFO L226 Difference]: Without dead ends: 282 [2020-12-21 21:49:10,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 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 21:49:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-21 21:49:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 274. [2020-12-21 21:49:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-21 21:49:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 348 transitions. [2020-12-21 21:49:10,291 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 348 transitions. Word has length 192 [2020-12-21 21:49:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:10,291 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 348 transitions. [2020-12-21 21:49:10,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:49:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 348 transitions. [2020-12-21 21:49:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-21 21:49:10,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:10,293 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:10,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:49:10,508 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash 562294050, now seen corresponding path program 21 times [2020-12-21 21:49:10,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:10,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162269424] [2020-12-21 21:49:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-21 21:49:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162269424] [2020-12-21 21:49:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920193684] [2020-12-21 21:49:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:16,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-21 21:49:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:49:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-12-21 21:49:16,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:16,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:49:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268747054] [2020-12-21 21:49:16,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:49:16,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:49:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:49:16,519 INFO L87 Difference]: Start difference. First operand 274 states and 348 transitions. Second operand 28 states. [2020-12-21 21:49:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:17,039 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2020-12-21 21:49:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:49:17,040 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2020-12-21 21:49:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:17,041 INFO L225 Difference]: With dead ends: 372 [2020-12-21 21:49:17,041 INFO L226 Difference]: Without dead ends: 293 [2020-12-21 21:49:17,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 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 21:49:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-21 21:49:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 285. [2020-12-21 21:49:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-21 21:49:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 362 transitions. [2020-12-21 21:49:17,050 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 362 transitions. Word has length 200 [2020-12-21 21:49:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:17,050 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 362 transitions. [2020-12-21 21:49:17,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:49:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 362 transitions. [2020-12-21 21:49:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-21 21:49:17,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:17,052 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:17,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:17,253 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -500984756, now seen corresponding path program 22 times [2020-12-21 21:49:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:17,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769253841] [2020-12-21 21:49:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-21 21:49:17,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769253841] [2020-12-21 21:49:17,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354951292] [2020-12-21 21:49:17,847 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 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 21:49:17,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:49:17,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:49:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-21 21:49:18,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:18,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:49:18,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40147181] [2020-12-21 21:49:18,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:49:18,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:49:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:49:18,208 INFO L87 Difference]: Start difference. First operand 285 states and 362 transitions. Second operand 29 states. [2020-12-21 21:49:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:18,781 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2020-12-21 21:49:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:49:18,782 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2020-12-21 21:49:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:18,783 INFO L225 Difference]: With dead ends: 386 [2020-12-21 21:49:18,783 INFO L226 Difference]: Without dead ends: 304 [2020-12-21 21:49:18,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 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 21:49:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-21 21:49:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 296. [2020-12-21 21:49:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-21 21:49:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 376 transitions. [2020-12-21 21:49:18,794 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 376 transitions. Word has length 208 [2020-12-21 21:49:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:18,794 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 376 transitions. [2020-12-21 21:49:18,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:49:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 376 transitions. [2020-12-21 21:49:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 21:49:18,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:18,796 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:19,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:49:19,009 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -520393502, now seen corresponding path program 23 times [2020-12-21 21:49:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:19,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956203989] [2020-12-21 21:49:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-21 21:49:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956203989] [2020-12-21 21:49:19,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781241989] [2020-12-21 21:49:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:21,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-21 21:49:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:49:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-21 21:49:21,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:21,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:49:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384815484] [2020-12-21 21:49:21,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:49:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:49:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:49:21,883 INFO L87 Difference]: Start difference. First operand 296 states and 376 transitions. Second operand 30 states. [2020-12-21 21:49:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:22,450 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions. [2020-12-21 21:49:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:49:22,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2020-12-21 21:49:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:22,453 INFO L225 Difference]: With dead ends: 400 [2020-12-21 21:49:22,453 INFO L226 Difference]: Without dead ends: 315 [2020-12-21 21:49:22,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:49:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-21 21:49:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-12-21 21:49:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-21 21:49:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2020-12-21 21:49:22,465 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 216 [2020-12-21 21:49:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:22,466 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2020-12-21 21:49:22,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:49:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2020-12-21 21:49:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-21 21:49:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:22,468 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:22,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:49:22,682 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash -87389044, now seen corresponding path program 24 times [2020-12-21 21:49:22,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:22,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371441131] [2020-12-21 21:49:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-12-21 21:49:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371441131] [2020-12-21 21:49:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270833306] [2020-12-21 21:49:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:30,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-21 21:49:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:49:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-12-21 21:49:31,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:31,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-21 21:49:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806103967] [2020-12-21 21:49:31,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:49:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:49:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:49:31,159 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand 31 states. [2020-12-21 21:49:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:31,760 INFO L93 Difference]: Finished difference Result 414 states and 506 transitions. [2020-12-21 21:49:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:49:31,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 224 [2020-12-21 21:49:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:31,763 INFO L225 Difference]: With dead ends: 414 [2020-12-21 21:49:31,764 INFO L226 Difference]: Without dead ends: 326 [2020-12-21 21:49:31,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:49:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-21 21:49:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-12-21 21:49:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-21 21:49:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 404 transitions. [2020-12-21 21:49:31,776 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 404 transitions. Word has length 224 [2020-12-21 21:49:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:31,776 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 404 transitions. [2020-12-21 21:49:31,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:49:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 404 transitions. [2020-12-21 21:49:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-21 21:49:31,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:31,778 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:31,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:49:31,979 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2018122914, now seen corresponding path program 25 times [2020-12-21 21:49:31,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:31,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549792059] [2020-12-21 21:49:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-21 21:49:32,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549792059] [2020-12-21 21:49:32,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522674798] [2020-12-21 21:49:32,699 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 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 21:49:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:49:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-21 21:49:33,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:33,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:49:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544232806] [2020-12-21 21:49:33,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:49:33,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:49:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:49:33,119 INFO L87 Difference]: Start difference. First operand 318 states and 404 transitions. Second operand 32 states. [2020-12-21 21:49:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:33,774 INFO L93 Difference]: Finished difference Result 428 states and 523 transitions. [2020-12-21 21:49:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:49:33,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 232 [2020-12-21 21:49:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:33,776 INFO L225 Difference]: With dead ends: 428 [2020-12-21 21:49:33,777 INFO L226 Difference]: Without dead ends: 337 [2020-12-21 21:49:33,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:49:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-21 21:49:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 329. [2020-12-21 21:49:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-21 21:49:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 418 transitions. [2020-12-21 21:49:33,787 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 418 transitions. Word has length 232 [2020-12-21 21:49:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:33,788 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 418 transitions. [2020-12-21 21:49:33,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:49:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 418 transitions. [2020-12-21 21:49:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-21 21:49:33,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:33,790 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:34,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:34,004 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash 82597068, now seen corresponding path program 26 times [2020-12-21 21:49:34,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:34,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025262655] [2020-12-21 21:49:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-21 21:49:34,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025262655] [2020-12-21 21:49:34,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751456128] [2020-12-21 21:49:34,758 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 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 21:49:34,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:49:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:49:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-21 21:49:35,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:35,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:49:35,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681415988] [2020-12-21 21:49:35,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:49:35,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:49:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:49:35,145 INFO L87 Difference]: Start difference. First operand 329 states and 418 transitions. Second operand 33 states. [2020-12-21 21:49:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:35,815 INFO L93 Difference]: Finished difference Result 442 states and 540 transitions. [2020-12-21 21:49:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:49:35,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 240 [2020-12-21 21:49:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:35,818 INFO L225 Difference]: With dead ends: 442 [2020-12-21 21:49:35,818 INFO L226 Difference]: Without dead ends: 348 [2020-12-21 21:49:35,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:49:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-21 21:49:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 340. [2020-12-21 21:49:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-12-21 21:49:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 432 transitions. [2020-12-21 21:49:35,829 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 432 transitions. Word has length 240 [2020-12-21 21:49:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:35,841 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 432 transitions. [2020-12-21 21:49:35,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:49:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 432 transitions. [2020-12-21 21:49:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-21 21:49:35,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:35,843 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:36,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:49:36,057 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -917767070, now seen corresponding path program 27 times [2020-12-21 21:49:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:36,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300066984] [2020-12-21 21:49:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-12-21 21:49:36,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300066984] [2020-12-21 21:49:36,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237834653] [2020-12-21 21:49:36,809 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 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 21:49:43,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2020-12-21 21:49:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:49:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-12-21 21:49:43,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:43,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:49:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100489240] [2020-12-21 21:49:43,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:49:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:49:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:49:43,631 INFO L87 Difference]: Start difference. First operand 340 states and 432 transitions. Second operand 34 states. [2020-12-21 21:49:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:44,321 INFO L93 Difference]: Finished difference Result 456 states and 557 transitions. [2020-12-21 21:49:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:49:44,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 248 [2020-12-21 21:49:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:44,325 INFO L225 Difference]: With dead ends: 456 [2020-12-21 21:49:44,325 INFO L226 Difference]: Without dead ends: 359 [2020-12-21 21:49:44,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:49:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-21 21:49:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2020-12-21 21:49:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-21 21:49:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 446 transitions. [2020-12-21 21:49:44,343 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 446 transitions. Word has length 248 [2020-12-21 21:49:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:44,343 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 446 transitions. [2020-12-21 21:49:44,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:49:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 446 transitions. [2020-12-21 21:49:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 21:49:44,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:44,346 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:44,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:44,559 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1054020340, now seen corresponding path program 28 times [2020-12-21 21:49:44,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:44,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738247666] [2020-12-21 21:49:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-12-21 21:49:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738247666] [2020-12-21 21:49:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528706101] [2020-12-21 21:49:45,434 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 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 21:49:45,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:49:45,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:45,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:49:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-12-21 21:49:45,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:45,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:49:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475197752] [2020-12-21 21:49:45,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:49:45,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:49:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:49:45,888 INFO L87 Difference]: Start difference. First operand 351 states and 446 transitions. Second operand 35 states. [2020-12-21 21:49:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:46,608 INFO L93 Difference]: Finished difference Result 470 states and 574 transitions. [2020-12-21 21:49:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:49:46,609 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2020-12-21 21:49:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:46,611 INFO L225 Difference]: With dead ends: 470 [2020-12-21 21:49:46,611 INFO L226 Difference]: Without dead ends: 370 [2020-12-21 21:49:46,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:49:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-21 21:49:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2020-12-21 21:49:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-21 21:49:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 460 transitions. [2020-12-21 21:49:46,622 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 460 transitions. Word has length 256 [2020-12-21 21:49:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:46,622 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 460 transitions. [2020-12-21 21:49:46,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:49:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 460 transitions. [2020-12-21 21:49:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-21 21:49:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:46,624 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:46,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:49:46,840 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash -522384350, now seen corresponding path program 29 times [2020-12-21 21:49:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:46,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503831622] [2020-12-21 21:49:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-12-21 21:49:47,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503831622] [2020-12-21 21:49:47,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074114267] [2020-12-21 21:49:47,699 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 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 21:49:52,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-21 21:49:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:49:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-12-21 21:49:53,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:53,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:49:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557753330] [2020-12-21 21:49:53,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:49:53,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:49:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:49:53,244 INFO L87 Difference]: Start difference. First operand 362 states and 460 transitions. Second operand 36 states. [2020-12-21 21:49:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:53,987 INFO L93 Difference]: Finished difference Result 484 states and 591 transitions. [2020-12-21 21:49:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:49:53,987 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 264 [2020-12-21 21:49:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:53,989 INFO L225 Difference]: With dead ends: 484 [2020-12-21 21:49:53,990 INFO L226 Difference]: Without dead ends: 381 [2020-12-21 21:49:53,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:49:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-21 21:49:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2020-12-21 21:49:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-12-21 21:49:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2020-12-21 21:49:54,000 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 264 [2020-12-21 21:49:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:54,001 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2020-12-21 21:49:54,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:49:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2020-12-21 21:49:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-21 21:49:54,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:54,003 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:54,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:49:54,217 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash -449817268, now seen corresponding path program 30 times [2020-12-21 21:49:54,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:54,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532635570] [2020-12-21 21:49:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-12-21 21:49:55,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532635570] [2020-12-21 21:49:55,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328661292] [2020-12-21 21:49:55,173 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 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 21:50:29,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-21 21:50:29,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:50:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:50:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:50:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-12-21 21:50:30,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:50:30,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:50:30,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405220183] [2020-12-21 21:50:30,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:50:30,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:50:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:50:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:50:30,073 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand 37 states. [2020-12-21 21:50:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:50:30,896 INFO L93 Difference]: Finished difference Result 498 states and 608 transitions. [2020-12-21 21:50:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:50:30,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 272 [2020-12-21 21:50:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:50:30,899 INFO L225 Difference]: With dead ends: 498 [2020-12-21 21:50:30,899 INFO L226 Difference]: Without dead ends: 392 [2020-12-21 21:50:30,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 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 21:50:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-12-21 21:50:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 384. [2020-12-21 21:50:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-21 21:50:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 488 transitions. [2020-12-21 21:50:30,909 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 488 transitions. Word has length 272 [2020-12-21 21:50:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:50:30,910 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 488 transitions. [2020-12-21 21:50:30,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:50:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 488 transitions. [2020-12-21 21:50:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-12-21 21:50:30,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:50:30,912 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:50:31,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:50:31,113 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:50:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:50:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1227273246, now seen corresponding path program 31 times [2020-12-21 21:50:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:50:31,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705616814] [2020-12-21 21:50:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:50:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-12-21 21:50:32,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705616814] [2020-12-21 21:50:32,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120617732] [2020-12-21 21:50:32,079 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 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 21:50:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:50:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:50:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-12-21 21:50:32,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:50:32,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:50:32,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919963828] [2020-12-21 21:50:32,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:50:32,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:50:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:50:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:50:32,527 INFO L87 Difference]: Start difference. First operand 384 states and 488 transitions. Second operand 38 states. [2020-12-21 21:50:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:50:33,352 INFO L93 Difference]: Finished difference Result 512 states and 625 transitions. [2020-12-21 21:50:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:50:33,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2020-12-21 21:50:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:50:33,356 INFO L225 Difference]: With dead ends: 512 [2020-12-21 21:50:33,356 INFO L226 Difference]: Without dead ends: 403 [2020-12-21 21:50:33,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 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 21:50:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-21 21:50:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2020-12-21 21:50:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-21 21:50:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 502 transitions. [2020-12-21 21:50:33,369 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 502 transitions. Word has length 280 [2020-12-21 21:50:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:50:33,369 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 502 transitions. [2020-12-21 21:50:33,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:50:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 502 transitions. [2020-12-21 21:50:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-21 21:50:33,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:50:33,372 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:50:33,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:50:33,587 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:50:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:50:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1536855436, now seen corresponding path program 32 times [2020-12-21 21:50:33,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:50:33,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876657817] [2020-12-21 21:50:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:50:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-12-21 21:50:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876657817] [2020-12-21 21:50:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766756494] [2020-12-21 21:50:34,622 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 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 21:50:34,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:50:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:50:34,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:50:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:50:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-12-21 21:50:35,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:50:35,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:50:35,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558532970] [2020-12-21 21:50:35,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:50:35,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:50:35,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:50:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:50:35,141 INFO L87 Difference]: Start difference. First operand 395 states and 502 transitions. Second operand 39 states. [2020-12-21 21:50:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:50:35,950 INFO L93 Difference]: Finished difference Result 526 states and 642 transitions. [2020-12-21 21:50:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:50:35,951 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 288 [2020-12-21 21:50:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:50:35,954 INFO L225 Difference]: With dead ends: 526 [2020-12-21 21:50:35,955 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 21:50:35,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:50:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 21:50:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 406. [2020-12-21 21:50:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-12-21 21:50:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 516 transitions. [2020-12-21 21:50:35,967 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 516 transitions. Word has length 288 [2020-12-21 21:50:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:50:35,967 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 516 transitions. [2020-12-21 21:50:35,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:50:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 516 transitions. [2020-12-21 21:50:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-21 21:50:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:50:35,970 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:50:36,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:50:36,183 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:50:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:50:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash -300106846, now seen corresponding path program 33 times [2020-12-21 21:50:36,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:50:36,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093145036] [2020-12-21 21:50:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:50:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-12-21 21:50:37,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093145036] [2020-12-21 21:50:37,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64414256] [2020-12-21 21:50:37,241 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 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 21:51:12,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2020-12-21 21:51:12,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:51:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-12-21 21:51:12,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:12,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:51:12,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885966213] [2020-12-21 21:51:12,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:51:12,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:51:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:51:12,447 INFO L87 Difference]: Start difference. First operand 406 states and 516 transitions. Second operand 40 states. [2020-12-21 21:51:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:13,414 INFO L93 Difference]: Finished difference Result 540 states and 659 transitions. [2020-12-21 21:51:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:51:13,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 296 [2020-12-21 21:51:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:13,421 INFO L225 Difference]: With dead ends: 540 [2020-12-21 21:51:13,421 INFO L226 Difference]: Without dead ends: 425 [2020-12-21 21:51:13,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:51:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-12-21 21:51:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2020-12-21 21:51:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-21 21:51:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 530 transitions. [2020-12-21 21:51:13,434 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 530 transitions. Word has length 296 [2020-12-21 21:51:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:13,435 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 530 transitions. [2020-12-21 21:51:13,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:51:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 530 transitions. [2020-12-21 21:51:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-12-21 21:51:13,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:13,438 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:13,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:51:13,652 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2079353396, now seen corresponding path program 34 times [2020-12-21 21:51:13,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:13,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422976737] [2020-12-21 21:51:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-12-21 21:51:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422976737] [2020-12-21 21:51:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608083678] [2020-12-21 21:51:14,837 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 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 21:51:15,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:51:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:51:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-12-21 21:51:15,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:15,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:51:15,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700430286] [2020-12-21 21:51:15,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:51:15,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:51:15,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:51:15,393 INFO L87 Difference]: Start difference. First operand 417 states and 530 transitions. Second operand 41 states. [2020-12-21 21:51:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:16,285 INFO L93 Difference]: Finished difference Result 554 states and 676 transitions. [2020-12-21 21:51:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:51:16,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2020-12-21 21:51:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:16,291 INFO L225 Difference]: With dead ends: 554 [2020-12-21 21:51:16,292 INFO L226 Difference]: Without dead ends: 436 [2020-12-21 21:51:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:51:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-21 21:51:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 428. [2020-12-21 21:51:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-12-21 21:51:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 544 transitions. [2020-12-21 21:51:16,306 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 544 transitions. Word has length 304 [2020-12-21 21:51:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:16,306 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 544 transitions. [2020-12-21 21:51:16,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:51:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 544 transitions. [2020-12-21 21:51:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-12-21 21:51:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:16,309 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:16,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:51:16,523 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1803330718, now seen corresponding path program 35 times [2020-12-21 21:51:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:16,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971370869] [2020-12-21 21:51:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-12-21 21:51:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971370869] [2020-12-21 21:51:17,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679851141] [2020-12-21 21:51:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:28,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2020-12-21 21:51:28,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:51:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2020-12-21 21:51:29,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:29,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:51:29,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664012421] [2020-12-21 21:51:29,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:51:29,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:51:29,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:51:29,351 INFO L87 Difference]: Start difference. First operand 428 states and 544 transitions. Second operand 42 states. [2020-12-21 21:51:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:30,203 INFO L93 Difference]: Finished difference Result 568 states and 693 transitions. [2020-12-21 21:51:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:51:30,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 312 [2020-12-21 21:51:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:30,206 INFO L225 Difference]: With dead ends: 568 [2020-12-21 21:51:30,206 INFO L226 Difference]: Without dead ends: 447 [2020-12-21 21:51:30,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:51:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-12-21 21:51:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 439. [2020-12-21 21:51:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-21 21:51:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 558 transitions. [2020-12-21 21:51:30,217 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 558 transitions. Word has length 312 [2020-12-21 21:51:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:30,217 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 558 transitions. [2020-12-21 21:51:30,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:51:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 558 transitions. [2020-12-21 21:51:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-12-21 21:51:30,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:30,220 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:30,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:51:30,435 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1932750348, now seen corresponding path program 36 times [2020-12-21 21:51:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:30,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380437498] [2020-12-21 21:51:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-12-21 21:51:31,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380437498] [2020-12-21 21:51:31,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485498608] [2020-12-21 21:51:31,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:39,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2020-12-21 21:52:39,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:52:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2020-12-21 21:52:40,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:40,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:52:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804476219] [2020-12-21 21:52:40,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:52:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:52:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:52:40,131 INFO L87 Difference]: Start difference. First operand 439 states and 558 transitions. Second operand 43 states. [2020-12-21 21:52:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:40,963 INFO L93 Difference]: Finished difference Result 582 states and 710 transitions. [2020-12-21 21:52:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:52:40,964 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 320 [2020-12-21 21:52:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:40,968 INFO L225 Difference]: With dead ends: 582 [2020-12-21 21:52:40,968 INFO L226 Difference]: Without dead ends: 458 [2020-12-21 21:52:40,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 320 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 21:52:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-21 21:52:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2020-12-21 21:52:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-21 21:52:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 572 transitions. [2020-12-21 21:52:40,979 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 572 transitions. Word has length 320 [2020-12-21 21:52:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:40,979 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 572 transitions. [2020-12-21 21:52:40,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:52:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 572 transitions. [2020-12-21 21:52:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-21 21:52:40,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:40,982 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:41,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:41,198 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash -488035550, now seen corresponding path program 37 times [2020-12-21 21:52:41,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:41,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643741218] [2020-12-21 21:52:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-21 21:52:42,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643741218] [2020-12-21 21:52:42,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120353641] [2020-12-21 21:52:42,508 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 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 21:52:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:52:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-21 21:52:43,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:43,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:52:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704603751] [2020-12-21 21:52:43,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:52:43,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:52:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:52:43,040 INFO L87 Difference]: Start difference. First operand 450 states and 572 transitions. Second operand 44 states. [2020-12-21 21:52:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:43,948 INFO L93 Difference]: Finished difference Result 596 states and 727 transitions. [2020-12-21 21:52:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:52:43,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 328 [2020-12-21 21:52:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:43,951 INFO L225 Difference]: With dead ends: 596 [2020-12-21 21:52:43,951 INFO L226 Difference]: Without dead ends: 469 [2020-12-21 21:52:43,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 328 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 21:52:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-21 21:52:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2020-12-21 21:52:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-21 21:52:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 586 transitions. [2020-12-21 21:52:43,961 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 586 transitions. Word has length 328 [2020-12-21 21:52:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:43,962 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 586 transitions. [2020-12-21 21:52:43,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:52:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 586 transitions. [2020-12-21 21:52:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-21 21:52:43,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:43,965 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:44,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:44,180 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:44,181 INFO L82 PathProgramCache]: Analyzing trace with hash 850007628, now seen corresponding path program 38 times [2020-12-21 21:52:44,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:44,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530077197] [2020-12-21 21:52:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-21 21:52:45,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530077197] [2020-12-21 21:52:45,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863276372] [2020-12-21 21:52:45,552 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 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 21:52:45,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:52:45,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:45,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:52:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-21 21:52:46,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:46,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:52:46,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301090282] [2020-12-21 21:52:46,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:52:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:52:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:52:46,134 INFO L87 Difference]: Start difference. First operand 461 states and 586 transitions. Second operand 45 states. [2020-12-21 21:52:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:47,108 INFO L93 Difference]: Finished difference Result 610 states and 744 transitions. [2020-12-21 21:52:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:52:47,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 336 [2020-12-21 21:52:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:47,112 INFO L225 Difference]: With dead ends: 610 [2020-12-21 21:52:47,112 INFO L226 Difference]: Without dead ends: 480 [2020-12-21 21:52:47,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 336 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 21:52:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-12-21 21:52:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2020-12-21 21:52:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-12-21 21:52:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 600 transitions. [2020-12-21 21:52:47,125 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 600 transitions. Word has length 336 [2020-12-21 21:52:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:47,126 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 600 transitions. [2020-12-21 21:52:47,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:52:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 600 transitions. [2020-12-21 21:52:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-12-21 21:52:47,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:47,128 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:47,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-21 21:52:47,344 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -47568158, now seen corresponding path program 39 times [2020-12-21 21:52:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:47,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893429497] [2020-12-21 21:52:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-12-21 21:52:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893429497] [2020-12-21 21:52:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875816343] [2020-12-21 21:52:48,666 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 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