/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:50,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:50,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:50,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:50,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:50,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:50,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:50,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:50,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:50,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:50,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:50,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:50,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:50,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:50,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:50,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:50,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:50,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:50,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:50,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:50,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:50,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:19:50,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,361 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2020-12-21 21:19:51,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fa69018/7af0993477224e179fc1899f8d144e2d/FLAGa2643ce0b [2020-12-21 21:19:52,045 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:52,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2020-12-21 21:19:52,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fa69018/7af0993477224e179fc1899f8d144e2d/FLAGa2643ce0b [2020-12-21 21:19:52,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fa69018/7af0993477224e179fc1899f8d144e2d [2020-12-21 21:19:52,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@989599e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,709 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2020-12-21 21:19:52,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,749 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,768 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2020-12-21 21:19:52,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,822 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (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 21:19:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:53,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,490 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 21:19:53,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d867e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d867e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,506 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2020-12-21 21:19:53,515 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,521 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:19:53,541 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:19:53,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,571 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,572 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,572 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,572 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-21 21:19:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,596 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2020-12-21 21:19:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211251948] [2020-12-21 21:19:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,866 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 21:19:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211251948] [2020-12-21 21:19:53,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263679159] [2020-12-21 21:19:53,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,904 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-21 21:19:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,937 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-21 21:19:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,949 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:19:53,949 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:19:53,953 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 21:19:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:19:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:19:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:19:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 21:19:53,988 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-21 21:19:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,988 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 21:19:53,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 21:19:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:53,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:53,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2020-12-21 21:19:53,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188014693] [2020-12-21 21:19:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,054 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 21:19:54,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188014693] [2020-12-21 21:19:54,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436620601] [2020-12-21 21:19:54,055 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 21:19:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754594236] [2020-12-21 21:19:54,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,158 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 21:19:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,172 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-21 21:19:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:19:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,174 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:19:54,174 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:19:54,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:19:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:19:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:19:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-21 21:19:54,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2020-12-21 21:19:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,182 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-21 21:19:54,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-21 21:19:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:19:54,397 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2020-12-21 21:19:54,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059557330] [2020-12-21 21:19:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059557330] [2020-12-21 21:19:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335740770] [2020-12-21 21:19:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800247448] [2020-12-21 21:19:54,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,586 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2020-12-21 21:19:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,623 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-12-21 21:19:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:19:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,629 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:19:54,629 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:54,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:19:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:19:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-21 21:19:54,642 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2020-12-21 21:19:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,644 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-21 21:19:54,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-21 21:19:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:19:54,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,864 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2020-12-21 21:19:54,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480646553] [2020-12-21 21:19:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,934 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 21:19:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480646553] [2020-12-21 21:19:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613639060] [2020-12-21 21:19:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:19:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,083 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 21:19:55,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:55,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455853394] [2020-12-21 21:19:55,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,086 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-21 21:19:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,111 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-12-21 21:19:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-21 21:19:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,113 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:19:55,113 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:55,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 21:19:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 21:19:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:19:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-21 21:19:55,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-21 21:19:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,120 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-21 21:19:55,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-21 21:19:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:19:55,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2020-12-21 21:19:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959642991] [2020-12-21 21:19:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959642991] [2020-12-21 21:19:55,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343358782] [2020-12-21 21:19:55,390 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 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 21:19:55,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:55,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:55,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:19:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073973809] [2020-12-21 21:19:55,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,524 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2020-12-21 21:19:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,573 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-12-21 21:19:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:55,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-21 21:19:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,574 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:19:55,574 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:19:55,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:19:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-21 21:19:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:19:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-21 21:19:55,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2020-12-21 21:19:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,582 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-21 21:19:55,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-21 21:19:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:19:55,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,797 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2020-12-21 21:19:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154337220] [2020-12-21 21:19:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:19:55,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154337220] [2020-12-21 21:19:55,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051371650] [2020-12-21 21:19:55,908 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 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 21:19:55,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:19:55,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:19:56,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-21 21:19:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500975395] [2020-12-21 21:19:56,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:19:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:19:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:56,037 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2020-12-21 21:19:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,093 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-12-21 21:19:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:56,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-21 21:19:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,094 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:19:56,094 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:19:56,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:19:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-21 21:19:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:19:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 21:19:56,101 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2020-12-21 21:19:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,101 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 21:19:56,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:19:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 21:19:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:19:56,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:19:56,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2020-12-21 21:19:56,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995757475] [2020-12-21 21:19:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995757475] [2020-12-21 21:19:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134318754] [2020-12-21 21:19:56,442 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 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 21:19:56,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:56,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528032373] [2020-12-21 21:19:56,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:56,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,565 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-12-21 21:19:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,593 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-21 21:19:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:19:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,594 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:19:56,594 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:19:56,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:19:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-21 21:19:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:19:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-21 21:19:56,601 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2020-12-21 21:19:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,601 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-21 21:19:56,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-21 21:19:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:19:56,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,603 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2020-12-21 21:19:56,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981049934] [2020-12-21 21:19:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981049934] [2020-12-21 21:19:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566774768] [2020-12-21 21:19:56,895 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 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 21:19:56,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:19:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:19:57,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:19:57,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416612705] [2020-12-21 21:19:57,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:57,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:57,061 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-21 21:19:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,147 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-12-21 21:19:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:19:57,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-21 21:19:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,148 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:19:57,148 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:19:57,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:19:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-21 21:19:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:19:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:19:57,156 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-12-21 21:19:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,156 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:19:57,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:19:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:19:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,158 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,373 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2020-12-21 21:19:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931328449] [2020-12-21 21:19:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:19:57,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931328449] [2020-12-21 21:19:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671976975] [2020-12-21 21:19:57,521 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 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 21:19:57,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:19:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:19:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380843145] [2020-12-21 21:19:57,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:57,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,750 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-21 21:19:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,831 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-21 21:19:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:19:57,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-21 21:19:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,835 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:19:57,835 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:57,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-21 21:19:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:19:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-21 21:19:57,849 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-12-21 21:19:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,851 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-21 21:19:57,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-21 21:19:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:57,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:19:58,068 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2020-12-21 21:19:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964293588] [2020-12-21 21:19:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964293588] [2020-12-21 21:19:58,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875839454] [2020-12-21 21:19:58,187 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 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 21:19:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:58,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968479639] [2020-12-21 21:19:58,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,338 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2020-12-21 21:19:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,385 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-12-21 21:19:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:58,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-21 21:19:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,386 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:19:58,386 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:19:58,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 21:19:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:19:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:19:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:19:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-12-21 21:19:58,393 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2020-12-21 21:19:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,393 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-12-21 21:19:58,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-12-21 21:19:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:19:58,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,610 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2020-12-21 21:19:58,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581855526] [2020-12-21 21:19:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581855526] [2020-12-21 21:19:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065071863] [2020-12-21 21:19:58,818 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 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 21:19:58,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:59,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:19:59,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613204362] [2020-12-21 21:19:59,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:59,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,061 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-12-21 21:19:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,105 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-12-21 21:19:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:59,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-12-21 21:19:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,106 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:19:59,106 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:59,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:19:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:19:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-21 21:19:59,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2020-12-21 21:19:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,113 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-21 21:19:59,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-21 21:19:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:19:59,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,115 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,329 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2020-12-21 21:19:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868230604] [2020-12-21 21:19:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:59,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868230604] [2020-12-21 21:19:59,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341958869] [2020-12-21 21:19:59,439 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 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 21:19:59,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:19:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:19:59,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:19:59,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795376657] [2020-12-21 21:19:59,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:19:59,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:19:59,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:19:59,643 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 18 states. [2020-12-21 21:19:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,767 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2020-12-21 21:19:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:19:59,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-21 21:19:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,769 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:19:59,769 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 21:19:59,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:19:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 21:19:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-12-21 21:19:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:19:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-21 21:19:59,794 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2020-12-21 21:19:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,794 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-21 21:19:59,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:19:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-21 21:19:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:19:59,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,796 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:59,997 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2020-12-21 21:19:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006466126] [2020-12-21 21:19:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:20:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006466126] [2020-12-21 21:20:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743401847] [2020-12-21 21:20:00,153 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 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 21:20:00,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:00,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:20:00,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:00,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885728438] [2020-12-21 21:20:00,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:00,291 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 14 states. [2020-12-21 21:20:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,343 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-21 21:20:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:00,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-21 21:20:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,344 INFO L225 Difference]: With dead ends: 122 [2020-12-21 21:20:00,345 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:20:00,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 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 21:20:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:20:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-21 21:20:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:20:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-12-21 21:20:00,350 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2020-12-21 21:20:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,351 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-12-21 21:20:00,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-12-21 21:20:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:20:00,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,352 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:20:00,567 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2020-12-21 21:20:00,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550834606] [2020-12-21 21:20:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:20:00,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550834606] [2020-12-21 21:20:00,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438248572] [2020-12-21 21:20:00,713 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 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 21:20:00,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:20:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-21 21:20:01,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-12-21 21:20:01,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327991874] [2020-12-21 21:20:01,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:01,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:01,047 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 21 states. [2020-12-21 21:20:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,168 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-12-21 21:20:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:01,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-21 21:20:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,170 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:20:01,170 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:20:01,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:20:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-12-21 21:20:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:20:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-12-21 21:20:01,175 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2020-12-21 21:20:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,176 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-12-21 21:20:01,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-12-21 21:20:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:20:01,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,177 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:20:01,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2020-12-21 21:20:01,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083280513] [2020-12-21 21:20:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083280513] [2020-12-21 21:20:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986021691] [2020-12-21 21:20:01,556 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 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 21:20:01,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:01,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917029419] [2020-12-21 21:20:01,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:01,881 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 16 states. [2020-12-21 21:20:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,936 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-12-21 21:20:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:01,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-21 21:20:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,937 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:20:01,938 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:20:01,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 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 21:20:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:20:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-21 21:20:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:20:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-21 21:20:01,949 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2020-12-21 21:20:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,949 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-21 21:20:01,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-21 21:20:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:20:01,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,951 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,166 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2020-12-21 21:20:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600391174] [2020-12-21 21:20:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600391174] [2020-12-21 21:20:02,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445005933] [2020-12-21 21:20:02,343 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 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 21:20:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:02,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943469016] [2020-12-21 21:20:02,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:02,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,493 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2020-12-21 21:20:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,560 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2020-12-21 21:20:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:02,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-12-21 21:20:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,562 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:20:02,562 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:20:02,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 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 21:20:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:20:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:20:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:20:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-12-21 21:20:02,567 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2020-12-21 21:20:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,567 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-12-21 21:20:02,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-12-21 21:20:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:20:02,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,568 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:02,783 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2020-12-21 21:20:02,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589681223] [2020-12-21 21:20:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589681223] [2020-12-21 21:20:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965691437] [2020-12-21 21:20:03,016 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 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 21:20:03,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:03,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514029635] [2020-12-21 21:20:03,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:03,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:03,212 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2020-12-21 21:20:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,277 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2020-12-21 21:20:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:03,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-12-21 21:20:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,278 INFO L225 Difference]: With dead ends: 142 [2020-12-21 21:20:03,278 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:20:03,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 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 21:20:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:20:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:20:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:20:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-12-21 21:20:03,283 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2020-12-21 21:20:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,284 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-12-21 21:20:03,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-12-21 21:20:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:20:03,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,285 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:03,499 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2020-12-21 21:20:03,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378824555] [2020-12-21 21:20:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:03,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378824555] [2020-12-21 21:20:03,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525798019] [2020-12-21 21:20:03,711 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 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 21:20:03,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:20:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:20:04,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-21 21:20:04,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348627715] [2020-12-21 21:20:04,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:04,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:04,063 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2020-12-21 21:20:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,214 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2020-12-21 21:20:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:04,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-21 21:20:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,216 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:20:04,216 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 21:20:04,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 21:20:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-12-21 21:20:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-21 21:20:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-12-21 21:20:04,222 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2020-12-21 21:20:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,222 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-12-21 21:20:04,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-12-21 21:20:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:20:04,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,223 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:20:04,437 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2020-12-21 21:20:04,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724285092] [2020-12-21 21:20:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:04,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724285092] [2020-12-21 21:20:04,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629309223] [2020-12-21 21:20:04,678 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 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 21:20:04,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754982117] [2020-12-21 21:20:04,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:04,840 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2020-12-21 21:20:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,904 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-12-21 21:20:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:04,904 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-12-21 21:20:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,905 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:20:04,905 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:20:04,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:20:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-21 21:20:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 21:20:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-12-21 21:20:04,910 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2020-12-21 21:20:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,910 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-12-21 21:20:04,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-12-21 21:20:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:20:04,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,911 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,125 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2020-12-21 21:20:05,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674914636] [2020-12-21 21:20:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674914636] [2020-12-21 21:20:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051670350] [2020-12-21 21:20:05,386 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 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 21:20:05,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:20:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:20:05,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-21 21:20:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597379951] [2020-12-21 21:20:05,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:05,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:05,892 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2020-12-21 21:20:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,052 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-12-21 21:20:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:06,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-21 21:20:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,053 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:20:06,053 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:20:06,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:20:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-12-21 21:20:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 21:20:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-12-21 21:20:06,059 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2020-12-21 21:20:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,059 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-12-21 21:20:06,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-12-21 21:20:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:20:06,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,060 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,267 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2020-12-21 21:20:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252517782] [2020-12-21 21:20:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-21 21:20:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252517782] [2020-12-21 21:20:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127791210] [2020-12-21 21:20:06,556 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 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 21:20:07,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:20:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 21:20:07,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-21 21:20:07,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003866809] [2020-12-21 21:20:07,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:07,389 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2020-12-21 21:20:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,584 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-12-21 21:20:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:07,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-12-21 21:20:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,586 INFO L225 Difference]: With dead ends: 184 [2020-12-21 21:20:07,586 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:07,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 21:20:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:20:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-12-21 21:20:07,591 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2020-12-21 21:20:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,591 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-12-21 21:20:07,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-12-21 21:20:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:20:07,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,592 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:07,808 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2020-12-21 21:20:07,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069318774] [2020-12-21 21:20:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:08,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069318774] [2020-12-21 21:20:08,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518293181] [2020-12-21 21:20:08,105 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 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 21:20:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:08,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:20:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904041773] [2020-12-21 21:20:08,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:08,287 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2020-12-21 21:20:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,365 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2020-12-21 21:20:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:08,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2020-12-21 21:20:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,367 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:20:08,367 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:20:08,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 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 21:20:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:20:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:20:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:20:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2020-12-21 21:20:08,373 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2020-12-21 21:20:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,373 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2020-12-21 21:20:08,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2020-12-21 21:20:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:20:08,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,374 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:08,589 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2020-12-21 21:20:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340212505] [2020-12-21 21:20:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:08,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340212505] [2020-12-21 21:20:08,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88287821] [2020-12-21 21:20:08,903 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 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 21:20:09,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:09,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:09,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:09,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:20:09,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645595203] [2020-12-21 21:20:09,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:09,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:09,156 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2020-12-21 21:20:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,260 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-12-21 21:20:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:09,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-12-21 21:20:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,262 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:20:09,262 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:09,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 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 21:20:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-21 21:20:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:20:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-12-21 21:20:09,267 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2020-12-21 21:20:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,268 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-12-21 21:20:09,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-12-21 21:20:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:20:09,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,273 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,486 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,487 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2020-12-21 21:20:09,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836721966] [2020-12-21 21:20:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:09,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836721966] [2020-12-21 21:20:09,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712673191] [2020-12-21 21:20:09,848 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 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 21:20:10,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:20:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-21 21:20:10,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2020-12-21 21:20:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657252839] [2020-12-21 21:20:10,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:10,355 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2020-12-21 21:20:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,533 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2020-12-21 21:20:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:10,534 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-12-21 21:20:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,535 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:20:10,535 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:20:10,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:20:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2020-12-21 21:20:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:20:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2020-12-21 21:20:10,542 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2020-12-21 21:20:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,543 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2020-12-21 21:20:10,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2020-12-21 21:20:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:20:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,544 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:10,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:10,755 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2020-12-21 21:20:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:10,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17267062] [2020-12-21 21:20:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:11,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17267062] [2020-12-21 21:20:11,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324526012] [2020-12-21 21:20:11,159 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 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 21:20:11,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:11,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411162369] [2020-12-21 21:20:11,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:11,410 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2020-12-21 21:20:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:11,494 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-12-21 21:20:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:11,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2020-12-21 21:20:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:11,496 INFO L225 Difference]: With dead ends: 206 [2020-12-21 21:20:11,496 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:20:11,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 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 21:20:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:20:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 21:20:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:20:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2020-12-21 21:20:11,501 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2020-12-21 21:20:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:11,501 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2020-12-21 21:20:11,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2020-12-21 21:20:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:20:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:11,503 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:11,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,715 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2020-12-21 21:20:11,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:11,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111862423] [2020-12-21 21:20:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111862423] [2020-12-21 21:20:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155528315] [2020-12-21 21:20:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:12,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 21:20:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 21:20:13,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:13,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2020-12-21 21:20:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101001343] [2020-12-21 21:20:13,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:13,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:13,159 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2020-12-21 21:20:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:13,375 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2020-12-21 21:20:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:13,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2020-12-21 21:20:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:13,377 INFO L225 Difference]: With dead ends: 218 [2020-12-21 21:20:13,377 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:20:13,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:20:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2020-12-21 21:20:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-21 21:20:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-12-21 21:20:13,382 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2020-12-21 21:20:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:13,383 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-12-21 21:20:13,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-12-21 21:20:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:20:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:13,384 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:13,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:20:13,598 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2020-12-21 21:20:13,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:13,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035709526] [2020-12-21 21:20:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-12-21 21:20:14,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035709526] [2020-12-21 21:20:14,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93127100] [2020-12-21 21:20:14,076 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 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 21:20:15,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:20:15,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-21 21:20:16,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2020-12-21 21:20:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100181501] [2020-12-21 21:20:16,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:20:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:20:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:16,251 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2020-12-21 21:20:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,462 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2020-12-21 21:20:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:20:16,463 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-12-21 21:20:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,464 INFO L225 Difference]: With dead ends: 232 [2020-12-21 21:20:16,464 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 21:20:16,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 21:20:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2020-12-21 21:20:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 21:20:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-21 21:20:16,471 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2020-12-21 21:20:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,471 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-21 21:20:16,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:20:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-21 21:20:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:20:16,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,472 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:16,686 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2020-12-21 21:20:16,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092449772] [2020-12-21 21:20:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:17,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092449772] [2020-12-21 21:20:17,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891378913] [2020-12-21 21:20:17,199 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 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 21:20:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:17,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600420720] [2020-12-21 21:20:17,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:17,411 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2020-12-21 21:20:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,523 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2020-12-21 21:20:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:17,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2020-12-21 21:20:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,529 INFO L225 Difference]: With dead ends: 236 [2020-12-21 21:20:17,529 INFO L226 Difference]: Without dead ends: 146 [2020-12-21 21:20:17,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 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 21:20:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-21 21:20:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-21 21:20:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 21:20:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-12-21 21:20:17,536 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2020-12-21 21:20:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,536 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-12-21 21:20:17,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-12-21 21:20:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:20:17,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,537 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:20:17,744 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2020-12-21 21:20:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357416842] [2020-12-21 21:20:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:18,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357416842] [2020-12-21 21:20:18,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555013058] [2020-12-21 21:20:18,212 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 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 21:20:18,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:18,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:20:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:18,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:18,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:20:18,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769826648] [2020-12-21 21:20:18,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:18,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:18,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:18,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:18,451 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2020-12-21 21:20:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:18,559 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2020-12-21 21:20:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:18,560 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2020-12-21 21:20:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:18,561 INFO L225 Difference]: With dead ends: 238 [2020-12-21 21:20:18,561 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 21:20:18,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 21:20:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-21 21:20:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 21:20:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-12-21 21:20:18,569 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2020-12-21 21:20:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:18,570 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-12-21 21:20:18,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-12-21 21:20:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:20:18,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:18,571 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:18,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:18,785 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2020-12-21 21:20:18,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:18,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076090208] [2020-12-21 21:20:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:19,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076090208] [2020-12-21 21:20:19,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344567767] [2020-12-21 21:20:19,303 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 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 21:20:19,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 21:20:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-21 21:20:19,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:19,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2020-12-21 21:20:19,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927500046] [2020-12-21 21:20:19,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:20:19,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:20:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:20:19,960 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2020-12-21 21:20:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,151 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2020-12-21 21:20:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:20:20,152 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2020-12-21 21:20:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,153 INFO L225 Difference]: With dead ends: 250 [2020-12-21 21:20:20,153 INFO L226 Difference]: Without dead ends: 160 [2020-12-21 21:20:20,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:20:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-21 21:20:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-12-21 21:20:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:20:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2020-12-21 21:20:20,160 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2020-12-21 21:20:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2020-12-21 21:20:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:20:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2020-12-21 21:20:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:20:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,161 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:20,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:20,375 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2020-12-21 21:20:20,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:20,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130966069] [2020-12-21 21:20:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130966069] [2020-12-21 21:20:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021523224] [2020-12-21 21:20:20,970 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 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 21:20:21,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:21,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:21,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:21,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:21,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241159355] [2020-12-21 21:20:21,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:21,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:21,206 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2020-12-21 21:20:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:21,329 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2020-12-21 21:20:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:21,330 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2020-12-21 21:20:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:21,331 INFO L225 Difference]: With dead ends: 254 [2020-12-21 21:20:21,331 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 21:20:21,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 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 21:20:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 21:20:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-21 21:20:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 21:20:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2020-12-21 21:20:21,337 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2020-12-21 21:20:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:21,337 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2020-12-21 21:20:21,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2020-12-21 21:20:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:20:21,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:21,339 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:21,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:21,555 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2020-12-21 21:20:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:21,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013723191] [2020-12-21 21:20:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:22,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013723191] [2020-12-21 21:20:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008011545] [2020-12-21 21:20:22,232 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 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 21:20:26,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-21 21:20:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:20:27,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:27,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2020-12-21 21:20:27,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307271841] [2020-12-21 21:20:27,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:20:27,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:20:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:27,057 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2020-12-21 21:20:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:27,330 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2020-12-21 21:20:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:20:27,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2020-12-21 21:20:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:27,332 INFO L225 Difference]: With dead ends: 266 [2020-12-21 21:20:27,332 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 21:20:27,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 21:20:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 21:20:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 21:20:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2020-12-21 21:20:27,338 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2020-12-21 21:20:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:27,338 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2020-12-21 21:20:27,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:20:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2020-12-21 21:20:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:20:27,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:27,340 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:27,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:27,556 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2020-12-21 21:20:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:27,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092783188] [2020-12-21 21:20:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-21 21:20:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092783188] [2020-12-21 21:20:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357835982] [2020-12-21 21:20:28,212 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 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 21:20:32,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-21 21:20:32,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:20:33,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2020-12-21 21:20:33,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073392607] [2020-12-21 21:20:33,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:20:33,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:20:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:33,476 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2020-12-21 21:20:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:33,720 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2020-12-21 21:20:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:20:33,720 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2020-12-21 21:20:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:33,721 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:20:33,722 INFO L226 Difference]: Without dead ends: 178 [2020-12-21 21:20:33,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-21 21:20:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2020-12-21 21:20:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-21 21:20:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2020-12-21 21:20:33,728 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2020-12-21 21:20:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:33,729 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2020-12-21 21:20:33,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:20:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2020-12-21 21:20:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:20:33,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:33,730 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:33,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:33,946 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2020-12-21 21:20:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:33,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272797234] [2020-12-21 21:20:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272797234] [2020-12-21 21:20:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267710212] [2020-12-21 21:20:34,694 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 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 21:20:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:34,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:34,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:34,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:20:34,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726382426] [2020-12-21 21:20:34,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:34,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:34,960 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2020-12-21 21:20:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:35,088 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2020-12-21 21:20:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:35,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2020-12-21 21:20:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:35,089 INFO L225 Difference]: With dead ends: 284 [2020-12-21 21:20:35,090 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:35,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-21 21:20:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-21 21:20:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-12-21 21:20:35,096 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2020-12-21 21:20:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:35,097 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-12-21 21:20:35,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-12-21 21:20:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:20:35,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:35,098 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:35,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:35,311 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:35,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2020-12-21 21:20:35,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:35,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703260095] [2020-12-21 21:20:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:36,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703260095] [2020-12-21 21:20:36,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544799914] [2020-12-21 21:20:36,073 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 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 21:20:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:20:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:36,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:36,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:20:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107531124] [2020-12-21 21:20:36,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:20:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:20:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:36,329 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2020-12-21 21:20:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:36,449 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-12-21 21:20:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:36,449 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2020-12-21 21:20:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:36,451 INFO L225 Difference]: With dead ends: 286 [2020-12-21 21:20:36,451 INFO L226 Difference]: Without dead ends: 178 [2020-12-21 21:20:36,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-21 21:20:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-21 21:20:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:20:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2020-12-21 21:20:36,457 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2020-12-21 21:20:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:36,457 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2020-12-21 21:20:36,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:20:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2020-12-21 21:20:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:20:36,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:36,459 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:36,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:36,672 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2020-12-21 21:20:36,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:36,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166194018] [2020-12-21 21:20:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:37,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166194018] [2020-12-21 21:20:37,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900382819] [2020-12-21 21:20:37,442 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 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 21:20:37,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-21 21:20:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:37,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-21 21:20:38,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:38,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2020-12-21 21:20:38,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786563714] [2020-12-21 21:20:38,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:20:38,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:38,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:20:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:20:38,393 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2020-12-21 21:20:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:38,733 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2020-12-21 21:20:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:20:38,734 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2020-12-21 21:20:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:38,735 INFO L225 Difference]: With dead ends: 298 [2020-12-21 21:20:38,735 INFO L226 Difference]: Without dead ends: 190 [2020-12-21 21:20:38,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:20:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-21 21:20:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2020-12-21 21:20:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-21 21:20:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2020-12-21 21:20:38,742 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2020-12-21 21:20:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:38,742 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2020-12-21 21:20:38,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:20:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2020-12-21 21:20:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:20:38,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:38,744 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:38,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:38,960 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2020-12-21 21:20:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:38,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981060448] [2020-12-21 21:20:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:39,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981060448] [2020-12-21 21:20:39,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752469109] [2020-12-21 21:20:39,864 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 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 21:20:39,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:20:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:20:40,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722339064] [2020-12-21 21:20:40,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:40,148 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2020-12-21 21:20:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:40,285 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2020-12-21 21:20:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:20:40,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2020-12-21 21:20:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:40,287 INFO L225 Difference]: With dead ends: 302 [2020-12-21 21:20:40,287 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 21:20:40,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 21:20:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-21 21:20:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-21 21:20:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2020-12-21 21:20:40,294 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2020-12-21 21:20:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:40,294 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2020-12-21 21:20:40,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2020-12-21 21:20:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-21 21:20:40,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:40,297 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:40,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:40,512 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2020-12-21 21:20:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:40,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153204614] [2020-12-21 21:20:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:41,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153204614] [2020-12-21 21:20:41,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858888481] [2020-12-21 21:20:41,467 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 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 21:20:47,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-21 21:20:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:20:48,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:48,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2020-12-21 21:20:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238744693] [2020-12-21 21:20:48,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 21:20:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 21:20:48,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:20:48,372 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2020-12-21 21:20:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:48,651 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2020-12-21 21:20:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-21 21:20:48,651 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2020-12-21 21:20:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:48,653 INFO L225 Difference]: With dead ends: 314 [2020-12-21 21:20:48,653 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 21:20:48,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:20:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 21:20:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2020-12-21 21:20:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 21:20:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2020-12-21 21:20:48,660 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2020-12-21 21:20:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:48,661 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2020-12-21 21:20:48,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 21:20:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2020-12-21 21:20:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 21:20:48,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:48,662 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:48,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:48,878 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2020-12-21 21:20:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:48,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964578411] [2020-12-21 21:20:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-12-21 21:20:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964578411] [2020-12-21 21:20:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111040378] [2020-12-21 21:20:49,841 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 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 21:21:00,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-21 21:21:00,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:00,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:21:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 72 proven. 477 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:21:01,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:01,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2020-12-21 21:21:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058389076] [2020-12-21 21:21:01,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 21:21:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 21:21:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:21:01,781 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 60 states. [2020-12-21 21:21:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:02,993 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2020-12-21 21:21:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-21 21:21:02,994 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2020-12-21 21:21:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:03,000 INFO L225 Difference]: With dead ends: 329 [2020-12-21 21:21:03,000 INFO L226 Difference]: Without dead ends: 209 [2020-12-21 21:21:03,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1447, Invalid=4715, Unknown=0, NotChecked=0, Total=6162 [2020-12-21 21:21:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-21 21:21:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-12-21 21:21:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-21 21:21:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2020-12-21 21:21:03,013 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 138 [2020-12-21 21:21:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:03,013 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2020-12-21 21:21:03,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 21:21:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2020-12-21 21:21:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-21 21:21:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:03,015 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:03,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:21:03,215 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2020-12-21 21:21:03,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:03,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991761125] [2020-12-21 21:21:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:04,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991761125] [2020-12-21 21:21:04,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033196843] [2020-12-21 21:21:04,307 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 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 21:21:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:21:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:04,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:04,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:21:04,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247568359] [2020-12-21 21:21:04,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:21:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:21:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:21:04,598 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2020-12-21 21:21:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:04,765 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2020-12-21 21:21:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:21:04,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2020-12-21 21:21:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:04,767 INFO L225 Difference]: With dead ends: 334 [2020-12-21 21:21:04,767 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 21:21:04,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 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 21:21:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 21:21:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-21 21:21:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-21 21:21:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2020-12-21 21:21:04,774 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2020-12-21 21:21:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:04,774 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2020-12-21 21:21:04,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:21:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2020-12-21 21:21:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-21 21:21:04,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:04,775 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:04,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:21:04,990 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2020-12-21 21:21:04,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:04,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732180840] [2020-12-21 21:21:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:06,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732180840] [2020-12-21 21:21:06,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581425842] [2020-12-21 21:21:06,054 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 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 21:21:06,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:21:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:06,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:21:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639332441] [2020-12-21 21:21:06,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:21:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:21:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:06,363 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2020-12-21 21:21:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:06,532 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2020-12-21 21:21:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:21:06,532 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2020-12-21 21:21:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:06,534 INFO L225 Difference]: With dead ends: 336 [2020-12-21 21:21:06,534 INFO L226 Difference]: Without dead ends: 210 [2020-12-21 21:21:06,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-21 21:21:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-21 21:21:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-21 21:21:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2020-12-21 21:21:06,541 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2020-12-21 21:21:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:06,542 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2020-12-21 21:21:06,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:21:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2020-12-21 21:21:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-21 21:21:06,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:06,543 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:06,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:06,757 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2020-12-21 21:21:06,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:06,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855408706] [2020-12-21 21:21:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855408706] [2020-12-21 21:21:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818516183] [2020-12-21 21:21:07,906 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 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 21:21:08,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 21:21:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:21:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 80 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-21 21:21:09,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:09,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2020-12-21 21:21:09,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310726004] [2020-12-21 21:21:09,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-21 21:21:09,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-21 21:21:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:21:09,625 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 65 states. [2020-12-21 21:21:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:11,009 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2020-12-21 21:21:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-21 21:21:11,010 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2020-12-21 21:21:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:11,011 INFO L225 Difference]: With dead ends: 349 [2020-12-21 21:21:11,011 INFO L226 Difference]: Without dead ends: 223 [2020-12-21 21:21:11,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2020-12-21 21:21:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-21 21:21:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-12-21 21:21:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-21 21:21:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-12-21 21:21:11,019 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 149 [2020-12-21 21:21:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:11,019 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-12-21 21:21:11,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-21 21:21:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-12-21 21:21:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 21:21:11,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:11,021 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:11,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 21:21:11,234 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1691192489, now seen corresponding path program 40 times [2020-12-21 21:21:11,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:11,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549766780] [2020-12-21 21:21:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-12-21 21:21:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549766780] [2020-12-21 21:21:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523678187] [2020-12-21 21:21:12,476 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:12,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:21:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-12-21 21:21:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:13,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 23] total 66 [2020-12-21 21:21:13,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084872507] [2020-12-21 21:21:13,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 21:21:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 21:21:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:21:13,685 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 66 states. [2020-12-21 21:21:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:14,096 INFO L93 Difference]: Finished difference Result 364 states and 458 transitions. [2020-12-21 21:21:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 21:21:14,097 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 156 [2020-12-21 21:21:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:14,098 INFO L225 Difference]: With dead ends: 364 [2020-12-21 21:21:14,098 INFO L226 Difference]: Without dead ends: 232 [2020-12-21 21:21:14,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:21:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-21 21:21:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2020-12-21 21:21:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-21 21:21:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 273 transitions. [2020-12-21 21:21:14,106 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 273 transitions. Word has length 156 [2020-12-21 21:21:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:14,106 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 273 transitions. [2020-12-21 21:21:14,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-21 21:21:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 273 transitions. [2020-12-21 21:21:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:21:14,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:14,108 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:14,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:14,318 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash -682288297, now seen corresponding path program 41 times [2020-12-21 21:21:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:14,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422578039] [2020-12-21 21:21:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-12-21 21:21:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422578039] [2020-12-21 21:21:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334671141] [2020-12-21 21:21:15,696 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:20,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-21 21:22:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:22:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2020-12-21 21:22:22,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:22,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2020-12-21 21:22:22,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914642899] [2020-12-21 21:22:22,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 21:22:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 21:22:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:22,145 INFO L87 Difference]: Start difference. First operand 227 states and 273 transitions. Second operand 68 states. [2020-12-21 21:22:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:22,575 INFO L93 Difference]: Finished difference Result 378 states and 476 transitions. [2020-12-21 21:22:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 21:22:22,576 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 161 [2020-12-21 21:22:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:22,577 INFO L225 Difference]: With dead ends: 378 [2020-12-21 21:22:22,577 INFO L226 Difference]: Without dead ends: 240 [2020-12-21 21:22:22,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-21 21:22:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2020-12-21 21:22:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-21 21:22:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2020-12-21 21:22:22,586 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 161 [2020-12-21 21:22:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:22,586 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2020-12-21 21:22:22,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 21:22:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2020-12-21 21:22:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 21:22:22,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:22,588 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:22,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:22,804 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 42 times [2020-12-21 21:22:22,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:22,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763268553] [2020-12-21 21:22:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-12-21 21:22:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763268553] [2020-12-21 21:22:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980434170] [2020-12-21 21:22:24,279 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:51,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2020-12-21 21:22:51,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:22:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-12-21 21:22:53,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2020-12-21 21:22:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637568935] [2020-12-21 21:22:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-21 21:22:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-21 21:22:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 21:22:53,178 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 70 states. [2020-12-21 21:22:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:53,557 INFO L93 Difference]: Finished difference Result 392 states and 494 transitions. [2020-12-21 21:22:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-21 21:22:53,557 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 166 [2020-12-21 21:22:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:53,559 INFO L225 Difference]: With dead ends: 392 [2020-12-21 21:22:53,559 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:22:53,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 21:22:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:22:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2020-12-21 21:22:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-21 21:22:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2020-12-21 21:22:53,568 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 166 [2020-12-21 21:22:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:53,568 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2020-12-21 21:22:53,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-21 21:22:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2020-12-21 21:22:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 21:22:53,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:53,570 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:53,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:22:53,785 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash -180945709, now seen corresponding path program 43 times [2020-12-21 21:22:53,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:53,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839347341] [2020-12-21 21:22:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839347341] [2020-12-21 21:22:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245352920] [2020-12-21 21:22:55,341 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:55,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:22:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:55,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:55,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:22:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874801323] [2020-12-21 21:22:55,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:22:55,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:22:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:55,701 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 49 states. [2020-12-21 21:22:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:55,915 INFO L93 Difference]: Finished difference Result 396 states and 496 transitions. [2020-12-21 21:22:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:22:55,916 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2020-12-21 21:22:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:55,918 INFO L225 Difference]: With dead ends: 396 [2020-12-21 21:22:55,918 INFO L226 Difference]: Without dead ends: 246 [2020-12-21 21:22:55,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-21 21:22:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2020-12-21 21:22:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-21 21:22:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2020-12-21 21:22:55,927 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 171 [2020-12-21 21:22:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:55,928 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2020-12-21 21:22:55,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:22:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2020-12-21 21:22:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 21:22:55,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:55,930 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:56,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:22:56,146 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 44 times [2020-12-21 21:22:56,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:56,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943862677] [2020-12-21 21:22:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943862677] [2020-12-21 21:22:57,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109680647] [2020-12-21 21:22:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:57,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:22:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:58,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:58,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-21 21:22:58,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543596848] [2020-12-21 21:22:58,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:22:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:22:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:58,079 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2020-12-21 21:22:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:58,282 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2020-12-21 21:22:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:22:58,283 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2020-12-21 21:22:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:58,285 INFO L225 Difference]: With dead ends: 398 [2020-12-21 21:22:58,285 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:22:58,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:22:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-21 21:22:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 21:22:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2020-12-21 21:22:58,294 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2020-12-21 21:22:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:58,294 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2020-12-21 21:22:58,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:22:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2020-12-21 21:22:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-21 21:22:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:58,296 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:58,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 21:22:58,510 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 45 times [2020-12-21 21:22:58,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:58,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208712913] [2020-12-21 21:22:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:23:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208712913] [2020-12-21 21:23:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77444077] [2020-12-21 21:23:00,162 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:02,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-21 21:23:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:23:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 94 proven. 782 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-21 21:23:03,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:03,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 28] total 76 [2020-12-21 21:23:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974679888] [2020-12-21 21:23:03,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-21 21:23:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-21 21:23:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 21:23:03,924 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 76 states. [2020-12-21 21:23:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:05,744 INFO L93 Difference]: Finished difference Result 411 states and 518 transitions. [2020-12-21 21:23:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-21 21:23:05,745 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 175 [2020-12-21 21:23:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:05,747 INFO L225 Difference]: With dead ends: 411 [2020-12-21 21:23:05,747 INFO L226 Difference]: Without dead ends: 261 [2020-12-21 21:23:05,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2298, Invalid=7602, Unknown=0, NotChecked=0, Total=9900 [2020-12-21 21:23:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-21 21:23:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-12-21 21:23:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-21 21:23:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2020-12-21 21:23:05,757 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 175 [2020-12-21 21:23:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:05,757 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2020-12-21 21:23:05,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-21 21:23:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2020-12-21 21:23:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-21 21:23:05,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:05,759 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:05,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:05,973 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1237945143, now seen corresponding path program 46 times [2020-12-21 21:23:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:05,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722292071] [2020-12-21 21:23:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:23:07,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722292071] [2020-12-21 21:23:07,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263266044] [2020-12-21 21:23:07,857 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:08,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:23:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:23:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:23:08,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-21 21:23:08,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397168847] [2020-12-21 21:23:08,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:23:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:23:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:23:08,248 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 53 states. [2020-12-21 21:23:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:08,488 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2020-12-21 21:23:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:23:08,489 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 182 [2020-12-21 21:23:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:08,490 INFO L225 Difference]: With dead ends: 416 [2020-12-21 21:23:08,490 INFO L226 Difference]: Without dead ends: 260 [2020-12-21 21:23:08,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:23:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-21 21:23:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2020-12-21 21:23:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-21 21:23:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2020-12-21 21:23:08,500 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 182 [2020-12-21 21:23:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:08,500 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2020-12-21 21:23:08,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:23:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2020-12-21 21:23:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-21 21:23:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:08,502 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:08,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:23:08,717 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 47 times [2020-12-21 21:23:08,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:08,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844119897] [2020-12-21 21:23:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:23:10,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844119897] [2020-12-21 21:23:10,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983188430] [2020-12-21 21:23:10,678 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:46,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-21 21:23:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:23:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-12-21 21:23:47,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:47,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 78 [2020-12-21 21:23:47,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532240190] [2020-12-21 21:23:47,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-21 21:23:47,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:47,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-21 21:23:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 21:23:47,703 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand 78 states. [2020-12-21 21:23:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:48,298 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2020-12-21 21:23:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-21 21:23:48,299 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 184 [2020-12-21 21:23:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:48,301 INFO L225 Difference]: With dead ends: 428 [2020-12-21 21:23:48,302 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:23:48,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 21:23:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:23:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2020-12-21 21:23:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-21 21:23:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2020-12-21 21:23:48,312 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 184 [2020-12-21 21:23:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:48,312 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2020-12-21 21:23:48,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-21 21:23:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2020-12-21 21:23:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-21 21:23:48,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,314 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:48,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:23:48,531 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1136663111, now seen corresponding path program 48 times [2020-12-21 21:23:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:48,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989101055] [2020-12-21 21:23:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-12-21 21:23:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989101055] [2020-12-21 21:23:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703861618] [2020-12-21 21:23:50,612 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true