/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_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:48:22,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:48:22,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:48:22,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:48:22,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:48:22,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:48:22,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:48:22,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:48:22,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:48:22,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:48:22,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:48:22,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:48:22,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:48:22,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:48:22,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:48:22,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:48:22,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:48:22,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:48:22,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:48:22,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:48:22,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:48:22,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:48:22,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:48:22,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:48:22,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:48:22,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:48:22,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:48:22,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:48:22,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:48:22,833 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:48:22,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:48:22,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:48:22,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:48:22,836 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:48:22,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:48:22,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:48:22,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:48:22,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:48:22,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:48:22,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:48:22,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:48:22,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:48:22,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:48:22,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:48:22,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:48:22,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:48:22,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:22,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:48:22,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:48:22,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:48:22,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:48:22,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:48:22,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:48:22,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:48:22,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:48:23,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:48:23,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:48:23,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:48:23,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:48:23,275 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:48:23,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-12-21 21:48:23,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d7e0b5/35ad42d94fb848d4b57c687e8eec5194/FLAG6d5207b40 [2020-12-21 21:48:23,995 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:48:23,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-12-21 21:48:24,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d7e0b5/35ad42d94fb848d4b57c687e8eec5194/FLAG6d5207b40 [2020-12-21 21:48:24,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d7e0b5/35ad42d94fb848d4b57c687e8eec5194 [2020-12-21 21:48:24,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:48:24,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:48:24,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:24,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:48:24,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:48:24,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b212c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24, skipping insertion in model container [2020-12-21 21:48:24,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:48:24,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:48:24,569 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_of_struct_ptr_monotonic.i[999,1012] [2020-12-21 21:48:24,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:24,610 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:48:24,632 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_of_struct_ptr_monotonic.i[999,1012] [2020-12-21 21:48:24,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:24,677 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:48:24,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24 WrapperNode [2020-12-21 21:48:24,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:24,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:24,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:48:24,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:48:24,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:24,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:48:24,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:48:24,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:48:24,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:48:24,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:48:24,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:48:24,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:48:24,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (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 21:48:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-21 21:48:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:48:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-21 21:48:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:48:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:48:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 21:48:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:48:24,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:48:24,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:48:25,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:48:25,427 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:48:25,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:25 BoogieIcfgContainer [2020-12-21 21:48:25,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:48:25,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:48:25,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:48:25,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:48:25,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:24" (1/3) ... [2020-12-21 21:48:25,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ac2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:25, skipping insertion in model container [2020-12-21 21:48:25,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (2/3) ... [2020-12-21 21:48:25,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ac2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:25, skipping insertion in model container [2020-12-21 21:48:25,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:25" (3/3) ... [2020-12-21 21:48:25,438 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2020-12-21 21:48:25,446 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:48:25,451 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:48:25,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:48:25,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:48:25,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:48:25,501 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:48:25,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:48:25,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:48:25,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:48:25,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:48:25,502 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:48:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 21:48:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:25,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2020-12-21 21:48:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967487505] [2020-12-21 21:48:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,702 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 21:48:25,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967487505] [2020-12-21 21:48:25,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:25,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:48:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104577351] [2020-12-21 21:48:25,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:48:25,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:48:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:25,729 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 21:48:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:25,745 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2020-12-21 21:48:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:48:25,747 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 21:48:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:25,755 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:48:25,756 INFO L226 Difference]: Without dead ends: 14 [2020-12-21 21:48:25,759 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 21:48:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-21 21:48:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-21 21:48:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 21:48:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-21 21:48:25,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-21 21:48:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:25,795 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-21 21:48:25,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:48:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-21 21:48:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:25,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:48:25,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2020-12-21 21:48:25,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804534382] [2020-12-21 21:48:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,870 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 21:48:25,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804534382] [2020-12-21 21:48:25,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:25,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:48:25,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130415548] [2020-12-21 21:48:25,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:48:25,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:48:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:25,876 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-12-21 21:48:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:25,933 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-21 21:48:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:48:25,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:48:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:25,936 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:48:25,937 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:48:25,939 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 21:48:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:48:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-12-21 21:48:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:48:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:48:25,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-12-21 21:48:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:25,944 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:48:25,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:48:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:48:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:48:25,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:48:25,946 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2020-12-21 21:48:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723424689] [2020-12-21 21:48:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723424689] [2020-12-21 21:48:26,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239463540] [2020-12-21 21:48:26,024 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 21:48:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:48:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:26,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:48:26,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044121337] [2020-12-21 21:48:26,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:26,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:26,175 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-12-21 21:48:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:26,229 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-12-21 21:48:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:48:26,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-21 21:48:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:26,231 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:48:26,231 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:48:26,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:48:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2020-12-21 21:48:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:48:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 21:48:26,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-21 21:48:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:26,238 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 21:48:26,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 21:48:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:48:26,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:26,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:48:26,452 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 2 times [2020-12-21 21:48:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:26,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285316600] [2020-12-21 21:48:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285316600] [2020-12-21 21:48:26,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225581938] [2020-12-21 21:48:26,615 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 21:48:26,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:26,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:48:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:26,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:48:26,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225140956] [2020-12-21 21:48:26,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:48:26,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:48:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:26,753 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-21 21:48:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:26,826 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-12-21 21:48:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:48:26,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-21 21:48:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:26,829 INFO L225 Difference]: With dead ends: 55 [2020-12-21 21:48:26,829 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:48:26,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 21:48:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:48:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 23. [2020-12-21 21:48:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:48:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 21:48:26,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2020-12-21 21:48:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:26,839 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 21:48:26,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:48:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 21:48:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:48:26,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:26,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:27,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:27,056 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2018782330, now seen corresponding path program 3 times [2020-12-21 21:48:27,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:27,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121733019] [2020-12-21 21:48:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121733019] [2020-12-21 21:48:27,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192074100] [2020-12-21 21:48:27,175 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 21:48:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:48:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:48:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:27,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:48:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806835990] [2020-12-21 21:48:27,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:48:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:48:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:27,385 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-12-21 21:48:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:27,461 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-12-21 21:48:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:48:27,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 21:48:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:27,463 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:48:27,463 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 21:48:27,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 21:48:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 27. [2020-12-21 21:48:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:48:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 21:48:27,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2020-12-21 21:48:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:27,470 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 21:48:27,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:48:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 21:48:27,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:48:27,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:27,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:27,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:27,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 4 times [2020-12-21 21:48:27,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:27,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346855593] [2020-12-21 21:48:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346855593] [2020-12-21 21:48:27,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297520310] [2020-12-21 21:48:27,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:28,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:28,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:28,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:28,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:28,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:48:28,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416778675] [2020-12-21 21:48:28,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:48:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:28,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:48:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:28,578 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 8 states. [2020-12-21 21:48:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:28,685 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-21 21:48:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:48:28,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-21 21:48:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:28,689 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:48:28,689 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:48:28,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 21:48:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:48:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 31. [2020-12-21 21:48:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:48:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 21:48:28,696 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2020-12-21 21:48:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:28,697 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 21:48:28,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:48:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 21:48:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:48:28,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:28,698 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:28,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:28,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:28,916 INFO L82 PathProgramCache]: Analyzing trace with hash 214721744, now seen corresponding path program 5 times [2020-12-21 21:48:28,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:28,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630229923] [2020-12-21 21:48:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630229923] [2020-12-21 21:48:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030421722] [2020-12-21 21:48:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:30,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:48:30,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:48:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:30,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:30,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:48:30,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586585051] [2020-12-21 21:48:30,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:30,489 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2020-12-21 21:48:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:30,590 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-12-21 21:48:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:48:30,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-21 21:48:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:30,592 INFO L225 Difference]: With dead ends: 88 [2020-12-21 21:48:30,592 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:48:30,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 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 21:48:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:48:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 35. [2020-12-21 21:48:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:48:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-12-21 21:48:30,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2020-12-21 21:48:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:30,599 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-12-21 21:48:30,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-12-21 21:48:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:48:30,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:30,601 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:30,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:48:30,816 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:30,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 6 times [2020-12-21 21:48:30,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:30,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550536227] [2020-12-21 21:48:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:30,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550536227] [2020-12-21 21:48:30,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864461283] [2020-12-21 21:48:30,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:39,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:48:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:48:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:39,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:39,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:48:39,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353780749] [2020-12-21 21:48:39,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:48:39,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:48:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:39,720 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 10 states. [2020-12-21 21:48:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:39,819 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2020-12-21 21:48:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:48:39,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-21 21:48:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:39,821 INFO L225 Difference]: With dead ends: 99 [2020-12-21 21:48:39,821 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:48:39,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 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 21:48:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:48:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 39. [2020-12-21 21:48:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:48:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-21 21:48:39,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2020-12-21 21:48:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:39,828 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-21 21:48:39,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:48:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-21 21:48:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:48:39,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:39,829 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:40,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:40,044 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash 278137882, now seen corresponding path program 7 times [2020-12-21 21:48:40,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:40,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914281402] [2020-12-21 21:48:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914281402] [2020-12-21 21:48:40,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456155405] [2020-12-21 21:48:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:40,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:48:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:40,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:40,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:48:40,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209076229] [2020-12-21 21:48:40,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:48:40,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:40,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:48:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:40,447 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 11 states. [2020-12-21 21:48:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:40,549 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-12-21 21:48:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:48:40,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-21 21:48:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:40,551 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:48:40,551 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:48:40,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 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 21:48:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:48:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2020-12-21 21:48:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:48:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-21 21:48:40,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 36 [2020-12-21 21:48:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:40,571 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-21 21:48:40,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:48:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-21 21:48:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:48:40,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:40,575 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:40,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:40,789 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1961207807, now seen corresponding path program 8 times [2020-12-21 21:48:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:40,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997915380] [2020-12-21 21:48:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:40,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997915380] [2020-12-21 21:48:40,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324172114] [2020-12-21 21:48:40,982 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 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 21:48:41,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:48:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:48:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010153930] [2020-12-21 21:48:41,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:48:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:48:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:48:41,187 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-21 21:48:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:41,291 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2020-12-21 21:48:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:48:41,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-21 21:48:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:41,293 INFO L225 Difference]: With dead ends: 121 [2020-12-21 21:48:41,293 INFO L226 Difference]: Without dead ends: 113 [2020-12-21 21:48:41,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 21:48:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-21 21:48:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2020-12-21 21:48:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:48:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-12-21 21:48:41,299 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2020-12-21 21:48:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:41,299 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-12-21 21:48:41,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:48:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-12-21 21:48:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:48:41,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:41,301 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:41,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:48:41,506 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash -577975964, now seen corresponding path program 9 times [2020-12-21 21:48:41,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:41,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035102785] [2020-12-21 21:48:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:41,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035102785] [2020-12-21 21:48:41,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536795779] [2020-12-21 21:48:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:50:06,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:50:06,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:50:07,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:50:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:50:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:50:07,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:50:07,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:50:07,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259476146] [2020-12-21 21:50:07,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:50:07,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:50:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:50:07,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:50:07,106 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 13 states. [2020-12-21 21:50:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:50:07,232 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2020-12-21 21:50:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:50:07,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-12-21 21:50:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:50:07,234 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:50:07,235 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 21:50:07,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 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 21:50:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 21:50:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 51. [2020-12-21 21:50:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:50:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:50:07,240 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 44 [2020-12-21 21:50:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:50:07,240 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:50:07,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:50:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:50:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:50:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:50:07,241 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:50:07,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:50:07,442 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:50:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:50:07,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1900720201, now seen corresponding path program 10 times [2020-12-21 21:50:07,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:50:07,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459111340] [2020-12-21 21:50:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:50:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:50:07,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459111340] [2020-12-21 21:50:07,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248705443] [2020-12-21 21:50:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:50:32,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:50:32,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:50:32,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:50:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:50:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:50:32,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:50:32,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:50:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123593818] [2020-12-21 21:50:32,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:50:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:50:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:50:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:50:32,731 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-21 21:50:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:50:32,861 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2020-12-21 21:50:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:50:32,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-21 21:50:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:50:32,863 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:50:32,863 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 21:50:32,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 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 21:50:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 21:50:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 55. [2020-12-21 21:50:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 21:50:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-12-21 21:50:32,868 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 48 [2020-12-21 21:50:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:50:32,868 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-12-21 21:50:32,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:50:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-12-21 21:50:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:50:32,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:50:32,870 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:50:33,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:50:33,086 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:50:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:50:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1807704914, now seen corresponding path program 11 times [2020-12-21 21:50:33,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:50:33,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299197714] [2020-12-21 21:50:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:50:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:50:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:50:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299197714] [2020-12-21 21:50:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126266805] [2020-12-21 21:50:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:45,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:51:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:51:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:46,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:46,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:51:46,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033393233] [2020-12-21 21:51:46,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:51:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:46,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:51:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:51:46,016 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 15 states. [2020-12-21 21:51:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:46,164 INFO L93 Difference]: Finished difference Result 154 states and 183 transitions. [2020-12-21 21:51:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:51:46,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-12-21 21:51:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:46,166 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:51:46,166 INFO L226 Difference]: Without dead ends: 146 [2020-12-21 21:51:46,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 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 21:51:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-21 21:51:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 59. [2020-12-21 21:51:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:51:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-21 21:51:46,182 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 52 [2020-12-21 21:51:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:46,182 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-21 21:51:46,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:51:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-21 21:51:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:51:46,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:46,184 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:46,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:51:46,399 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 938462867, now seen corresponding path program 12 times [2020-12-21 21:51:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:46,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877207017] [2020-12-21 21:51:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:46,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877207017] [2020-12-21 21:51:46,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479631891] [2020-12-21 21:51:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true