/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:18:40,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:18:40,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:18:40,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:18:40,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:18:40,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:18:40,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:18:40,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:18:40,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:18:40,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:18:40,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:18:40,737 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:18:40,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:18:40,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:18:40,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:18:40,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:18:40,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:18:40,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:18:40,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:18:40,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:18:40,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:18:41,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:18:41,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:18:41,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:18:41,034 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:18:41,035 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:18:41,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-07-09 18:18:41,036 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-07-09 18:18:41,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:18:41,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:18:41,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:18:41,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:18:41,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:18:41,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:18:41,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:18:41,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:18:41,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:18:41,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/1) ... [2021-07-09 18:18:41,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:18:41,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:18:41,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:18:41,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:18:41,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (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 [2021-07-09 18:18:41,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:18:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:18:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:18:41,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:18:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:18:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:18:41,164 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:18:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:18:41,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:18:41,164 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:18:41,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:18:41,352 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:18:41,354 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:18:41 BoogieIcfgContainer [2021-07-09 18:18:41,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:18:41,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:18:41,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:18:41,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:18:41,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:18:41" (1/2) ... [2021-07-09 18:18:41,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309701ac and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:18:41, skipping insertion in model container [2021-07-09 18:18:41,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:18:41" (2/2) ... [2021-07-09 18:18:41,358 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-07-09 18:18:41,362 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:18:41,362 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:18:41,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:18:41,363 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:18:41,410 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:18:41,425 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:18:41,441 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:18:41,442 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:18:41,442 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:18:41,442 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:18:41,442 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:18:41,442 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:18:41,442 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:18:41,442 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:18:41,452 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-07-09 18:18:41,464 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:18:41,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:41,471 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:41,471 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-07-09 18:18:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:41,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337475563] [2021-07-09 18:18:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:41,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:41,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337475563] [2021-07-09 18:18:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337475563] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:18:41,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:18:41,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:18:41,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586894601] [2021-07-09 18:18:41,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:18:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:18:41,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:18:41,622 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:41,671 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-07-09 18:18:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:18:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:18:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:41,679 INFO L225 Difference]: With dead ends: 38 [2021-07-09 18:18:41,680 INFO L226 Difference]: Without dead ends: 38 [2021-07-09 18:18:41,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:18:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-09 18:18:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-07-09 18:18:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-07-09 18:18:41,712 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-07-09 18:18:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:41,712 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-07-09 18:18:41,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-07-09 18:18:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:18:41,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:41,714 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:41,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:18:41,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-07-09 18:18:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:41,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347538364] [2021-07-09 18:18:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:41,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:41,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347538364] [2021-07-09 18:18:41,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347538364] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:18:41,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:18:41,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:18:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701616381] [2021-07-09 18:18:41,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:18:41,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:18:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:18:41,776 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:41,805 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-07-09 18:18:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:18:41,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:18:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:41,807 INFO L225 Difference]: With dead ends: 62 [2021-07-09 18:18:41,807 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 18:18:41,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:18:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 18:18:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-07-09 18:18:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-07-09 18:18:41,813 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-07-09 18:18:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:41,814 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-07-09 18:18:41,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-07-09 18:18:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:18:41,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:41,815 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:41,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:18:41,815 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-07-09 18:18:41,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:41,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040104818] [2021-07-09 18:18:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:18:41,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:41,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040104818] [2021-07-09 18:18:41,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040104818] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:18:41,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:18:41,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:18:41,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265214827] [2021-07-09 18:18:41,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:18:41,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:18:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:18:41,843 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:41,856 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-07-09 18:18:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:18:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:18:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:41,858 INFO L225 Difference]: With dead ends: 87 [2021-07-09 18:18:41,858 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:18:41,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:18:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:18:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-07-09 18:18:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-07-09 18:18:41,863 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-07-09 18:18:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:41,864 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-07-09 18:18:41,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-07-09 18:18:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:41,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:41,864 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:41,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:18:41,865 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-07-09 18:18:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367143160] [2021-07-09 18:18:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:42,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:42,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367143160] [2021-07-09 18:18:42,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367143160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920802208] [2021-07-09 18:18:42,120 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 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 [2021-07-09 18:18:42,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:42,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920802208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:42,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:18:42,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621758776] [2021-07-09 18:18:42,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:42,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:42,702 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:42,991 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-07-09 18:18:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:18:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:42,995 INFO L225 Difference]: With dead ends: 116 [2021-07-09 18:18:42,995 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 18:18:42,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:18:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 18:18:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-07-09 18:18:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-07-09 18:18:43,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-07-09 18:18:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:43,013 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-07-09 18:18:43,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-07-09 18:18:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:43,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:43,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:43,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:43,221 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:43,221 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-07-09 18:18:43,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:43,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072059932] [2021-07-09 18:18:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:43,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:43,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072059932] [2021-07-09 18:18:43,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072059932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371828479] [2021-07-09 18:18:43,398 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 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 [2021-07-09 18:18:43,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:18:43,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:43,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371828479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:43,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:18:43,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510889477] [2021-07-09 18:18:43,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:43,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:43,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:43,822 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:44,237 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-07-09 18:18:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:18:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:44,239 INFO L225 Difference]: With dead ends: 163 [2021-07-09 18:18:44,239 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 18:18:44,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:18:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 18:18:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-07-09 18:18:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-07-09 18:18:44,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-07-09 18:18:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-07-09 18:18:44,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-07-09 18:18:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:44,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:44,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:44,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:44,459 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-07-09 18:18:44,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:44,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581718091] [2021-07-09 18:18:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:44,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581718091] [2021-07-09 18:18:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581718091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123098406] [2021-07-09 18:18:44,625 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 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 [2021-07-09 18:18:44,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:44,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:44,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123098406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:44,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:44,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464957962] [2021-07-09 18:18:44,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:44,973 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:45,744 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-07-09 18:18:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:18:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:45,745 INFO L225 Difference]: With dead ends: 201 [2021-07-09 18:18:45,745 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 18:18:45,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:18:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 18:18:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-07-09 18:18:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-07-09 18:18:45,749 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-07-09 18:18:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:45,749 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-07-09 18:18:45,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-07-09 18:18:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:45,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:45,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:45,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:18:45,968 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-07-09 18:18:45,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:45,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354915986] [2021-07-09 18:18:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:46,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354915986] [2021-07-09 18:18:46,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354915986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922703183] [2021-07-09 18:18:46,115 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 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 [2021-07-09 18:18:46,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:46,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:18:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:46,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922703183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:46,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:46,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:18:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11293569] [2021-07-09 18:18:46,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:46,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:46,433 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:46,822 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-07-09 18:18:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:18:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:46,824 INFO L225 Difference]: With dead ends: 144 [2021-07-09 18:18:46,824 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 18:18:46,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:18:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 18:18:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-07-09 18:18:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-07-09 18:18:46,832 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-07-09 18:18:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:46,834 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-07-09 18:18:46,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-07-09 18:18:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:46,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:46,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:47,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:47,049 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-07-09 18:18:47,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:47,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422353168] [2021-07-09 18:18:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:47,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:47,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422353168] [2021-07-09 18:18:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422353168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:47,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640588500] [2021-07-09 18:18:47,185 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 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 [2021-07-09 18:18:47,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:18:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:18:47,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640588500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:47,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:47,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:18:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130219416] [2021-07-09 18:18:47,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:47,515 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:48,128 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-07-09 18:18:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:18:48,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:48,129 INFO L225 Difference]: With dead ends: 199 [2021-07-09 18:18:48,130 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 18:18:48,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 18:18:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-07-09 18:18:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-07-09 18:18:48,133 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-07-09 18:18:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:48,133 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-07-09 18:18:48,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-07-09 18:18:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:48,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:48,134 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:48,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:18:48,350 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-07-09 18:18:48,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:48,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316883497] [2021-07-09 18:18:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:48,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:48,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316883497] [2021-07-09 18:18:48,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316883497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:48,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961077395] [2021-07-09 18:18:48,486 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 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 [2021-07-09 18:18:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:48,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:18:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:48,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961077395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:48,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:48,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045831739] [2021-07-09 18:18:48,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:48,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:48,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:48,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:48,757 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:49,118 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-07-09 18:18:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:18:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:49,119 INFO L225 Difference]: With dead ends: 172 [2021-07-09 18:18:49,120 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 18:18:49,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:18:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 18:18:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-07-09 18:18:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-07-09 18:18:49,122 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-07-09 18:18:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:49,123 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-07-09 18:18:49,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-07-09 18:18:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:18:49,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:49,123 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:49,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:18:49,339 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-07-09 18:18:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:49,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104479112] [2021-07-09 18:18:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:49,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104479112] [2021-07-09 18:18:49,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104479112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280145608] [2021-07-09 18:18:49,464 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 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 [2021-07-09 18:18:49,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:49,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:49,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:18:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280145608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:49,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:49,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106941550] [2021-07-09 18:18:49,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:49,737 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:50,109 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-07-09 18:18:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:18:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:18:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:50,110 INFO L225 Difference]: With dead ends: 214 [2021-07-09 18:18:50,110 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 18:18:50,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:18:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 18:18:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-07-09 18:18:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-07-09 18:18:50,113 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-07-09 18:18:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:50,113 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-07-09 18:18:50,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-07-09 18:18:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:50,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:50,114 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:50,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:50,329 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-07-09 18:18:50,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:50,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321975122] [2021-07-09 18:18:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:18:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321975122] [2021-07-09 18:18:50,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321975122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768280832] [2021-07-09 18:18:50,445 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 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 [2021-07-09 18:18:50,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:18:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:50,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768280832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:50,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-09 18:18:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272433702] [2021-07-09 18:18:50,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:18:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:18:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:50,778 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:51,053 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-07-09 18:18:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:18:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:51,054 INFO L225 Difference]: With dead ends: 186 [2021-07-09 18:18:51,054 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 18:18:51,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:18:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 18:18:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-07-09 18:18:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-07-09 18:18:51,058 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-07-09 18:18:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:51,058 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-07-09 18:18:51,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-07-09 18:18:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:51,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:51,058 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:51,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:18:51,273 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-07-09 18:18:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:51,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697446193] [2021-07-09 18:18:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:18:51,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:51,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697446193] [2021-07-09 18:18:51,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697446193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:51,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394059837] [2021-07-09 18:18:51,388 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 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 [2021-07-09 18:18:51,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:51,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:51,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394059837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:51,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:51,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-09 18:18:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611772019] [2021-07-09 18:18:51,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:18:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:18:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:51,842 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:52,367 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-07-09 18:18:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:18:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:52,368 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:18:52,368 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 18:18:52,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:18:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 18:18:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-07-09 18:18:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-07-09 18:18:52,372 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-07-09 18:18:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-07-09 18:18:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-07-09 18:18:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:52,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:52,372 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:52,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:18:52,588 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-07-09 18:18:52,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:52,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188920090] [2021-07-09 18:18:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:18:52,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:52,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188920090] [2021-07-09 18:18:52,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188920090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:52,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976141685] [2021-07-09 18:18:52,709 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 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 [2021-07-09 18:18:52,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:18:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:52,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976141685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:53,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:53,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-09 18:18:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623261864] [2021-07-09 18:18:53,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:18:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:18:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:53,192 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:53,918 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-07-09 18:18:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:18:53,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:53,919 INFO L225 Difference]: With dead ends: 196 [2021-07-09 18:18:53,919 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 18:18:53,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:18:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 18:18:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-07-09 18:18:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-07-09 18:18:53,923 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-07-09 18:18:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:53,923 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-07-09 18:18:53,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-07-09 18:18:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:53,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:53,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:54,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:54,142 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-07-09 18:18:54,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:54,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677389243] [2021-07-09 18:18:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:54,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677389243] [2021-07-09 18:18:54,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677389243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532124398] [2021-07-09 18:18:54,292 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 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 [2021-07-09 18:18:54,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:18:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:54,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532124398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:54,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:54,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:18:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38621933] [2021-07-09 18:18:54,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:54,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:54,613 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:54,932 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-07-09 18:18:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:18:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:54,938 INFO L225 Difference]: With dead ends: 168 [2021-07-09 18:18:54,938 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 18:18:54,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:18:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 18:18:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-07-09 18:18:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-07-09 18:18:54,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-07-09 18:18:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:54,941 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-07-09 18:18:54,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-07-09 18:18:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:54,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:54,942 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:55,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:18:55,147 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-07-09 18:18:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:55,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465367237] [2021-07-09 18:18:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:55,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465367237] [2021-07-09 18:18:55,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465367237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894254649] [2021-07-09 18:18:55,293 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 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 [2021-07-09 18:18:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:55,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894254649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:55,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:55,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:18:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192355376] [2021-07-09 18:18:55,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:55,593 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:55,934 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-07-09 18:18:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:18:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:55,935 INFO L225 Difference]: With dead ends: 163 [2021-07-09 18:18:55,935 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 18:18:55,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:18:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 18:18:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-07-09 18:18:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-07-09 18:18:55,937 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-07-09 18:18:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:55,937 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-07-09 18:18:55,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-07-09 18:18:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:18:55,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:55,938 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:56,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:56,151 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-07-09 18:18:56,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:56,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454154335] [2021-07-09 18:18:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:56,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:56,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454154335] [2021-07-09 18:18:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454154335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:56,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123088120] [2021-07-09 18:18:56,308 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 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 [2021-07-09 18:18:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:18:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:56,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123088120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:56,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:56,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 18:18:56,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715640398] [2021-07-09 18:18:56,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:18:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:18:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:56,759 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:57,329 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-07-09 18:18:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:18:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:18:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:57,330 INFO L225 Difference]: With dead ends: 277 [2021-07-09 18:18:57,330 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 18:18:57,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:18:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 18:18:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-07-09 18:18:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-07-09 18:18:57,334 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-07-09 18:18:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-07-09 18:18:57,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-07-09 18:18:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:18:57,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:57,335 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:57,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 18:18:57,551 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-07-09 18:18:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:57,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745498426] [2021-07-09 18:18:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:57,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745498426] [2021-07-09 18:18:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745498426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230392587] [2021-07-09 18:18:57,732 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 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 [2021-07-09 18:18:57,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:18:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:18:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230392587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:58,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:58,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:18:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678407014] [2021-07-09 18:18:58,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:18:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:18:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:18:58,185 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:59,442 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-07-09 18:18:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:18:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:18:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:59,443 INFO L225 Difference]: With dead ends: 345 [2021-07-09 18:18:59,444 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 18:18:59,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1348.3ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:18:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 18:18:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-07-09 18:18:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-07-09 18:18:59,448 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-07-09 18:18:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:59,448 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-07-09 18:18:59,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-07-09 18:18:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:18:59,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:59,448 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:59,664 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-07-09 18:18:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296279266] [2021-07-09 18:18:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:59,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:59,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296279266] [2021-07-09 18:18:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296279266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:59,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378276343] [2021-07-09 18:18:59,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:18:59,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:18:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378276343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:00,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:00,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:19:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084956473] [2021-07-09 18:19:00,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:19:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:19:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:19:00,312 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:01,929 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-07-09 18:19:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:19:01,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:01,931 INFO L225 Difference]: With dead ends: 351 [2021-07-09 18:19:01,931 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 18:19:01,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:19:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 18:19:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-07-09 18:19:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-07-09 18:19:01,935 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-07-09 18:19:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:01,935 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-07-09 18:19:01,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-07-09 18:19:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:01,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:01,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:02,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:19:02,145 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-07-09 18:19:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:02,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839317791] [2021-07-09 18:19:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:02,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:02,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839317791] [2021-07-09 18:19:02,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839317791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:02,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321513222] [2021-07-09 18:19:02,309 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 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 [2021-07-09 18:19:02,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:19:02,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:02,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:19:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:02,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321513222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:02,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:02,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-07-09 18:19:02,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354295662] [2021-07-09 18:19:02,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:19:02,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:19:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:19:02,883 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:05,674 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-07-09 18:19:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:19:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:05,676 INFO L225 Difference]: With dead ends: 411 [2021-07-09 18:19:05,676 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 18:19:05,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2713.8ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-07-09 18:19:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 18:19:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-07-09 18:19:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-07-09 18:19:05,682 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-07-09 18:19:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:05,682 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-07-09 18:19:05,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-07-09 18:19:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:05,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:05,682 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:05,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:05,901 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-07-09 18:19:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987220162] [2021-07-09 18:19:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:06,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987220162] [2021-07-09 18:19:06,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987220162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458913052] [2021-07-09 18:19:06,091 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 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 [2021-07-09 18:19:06,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:19:06,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:06,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458913052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:06,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:06,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:19:06,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767946131] [2021-07-09 18:19:06,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:19:06,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:06,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:19:06,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:19:06,540 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:07,424 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-07-09 18:19:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:19:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:07,425 INFO L225 Difference]: With dead ends: 331 [2021-07-09 18:19:07,425 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 18:19:07,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 992.8ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:19:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 18:19:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-07-09 18:19:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-07-09 18:19:07,435 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-07-09 18:19:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:07,436 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-07-09 18:19:07,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-07-09 18:19:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:07,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:07,436 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:07,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:07,652 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-07-09 18:19:07,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:07,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310117192] [2021-07-09 18:19:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:07,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310117192] [2021-07-09 18:19:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310117192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51350137] [2021-07-09 18:19:07,830 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:19:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:07,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:07,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51350137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:08,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:19:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891529969] [2021-07-09 18:19:08,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:08,243 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:09,570 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-07-09 18:19:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:19:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:09,572 INFO L225 Difference]: With dead ends: 389 [2021-07-09 18:19:09,572 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 18:19:09,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1256.7ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:19:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 18:19:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-07-09 18:19:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-07-09 18:19:09,577 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-07-09 18:19:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:09,577 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-07-09 18:19:09,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-07-09 18:19:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:09,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:09,577 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:09,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:19:09,778 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-07-09 18:19:09,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122788317] [2021-07-09 18:19:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:09,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:09,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122788317] [2021-07-09 18:19:09,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122788317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:09,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585301419] [2021-07-09 18:19:09,945 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 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 [2021-07-09 18:19:09,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:10,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585301419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:10,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:10,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:19:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318064466] [2021-07-09 18:19:10,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:10,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:10,357 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:11,341 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-07-09 18:19:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:19:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:11,343 INFO L225 Difference]: With dead ends: 364 [2021-07-09 18:19:11,343 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 18:19:11,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:19:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 18:19:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-07-09 18:19:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-07-09 18:19:11,347 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-07-09 18:19:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:11,347 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-07-09 18:19:11,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-07-09 18:19:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:11,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:11,348 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:11,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:11,561 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-07-09 18:19:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446473525] [2021-07-09 18:19:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:11,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446473525] [2021-07-09 18:19:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446473525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603260202] [2021-07-09 18:19:11,719 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 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 [2021-07-09 18:19:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:19:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:12,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603260202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:12,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:12,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:19:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394908423] [2021-07-09 18:19:12,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:19:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:19:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:19:12,152 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:13,098 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-07-09 18:19:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:19:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:13,100 INFO L225 Difference]: With dead ends: 410 [2021-07-09 18:19:13,100 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 18:19:13,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1038.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:19:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 18:19:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-07-09 18:19:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-07-09 18:19:13,105 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-07-09 18:19:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:13,105 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-07-09 18:19:13,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-07-09 18:19:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:13,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:13,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:13,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:19:13,313 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-07-09 18:19:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:13,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669167807] [2021-07-09 18:19:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:13,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:13,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669167807] [2021-07-09 18:19:13,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669167807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:13,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754941168] [2021-07-09 18:19:13,483 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 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 [2021-07-09 18:19:13,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:13,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:13,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754941168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:13,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:19:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540345358] [2021-07-09 18:19:13,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:13,904 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:15,341 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-07-09 18:19:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:19:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:15,342 INFO L225 Difference]: With dead ends: 464 [2021-07-09 18:19:15,342 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 18:19:15,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1397.3ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:19:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 18:19:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-07-09 18:19:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-07-09 18:19:15,347 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-07-09 18:19:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:15,347 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-07-09 18:19:15,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-07-09 18:19:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:15,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:15,348 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:15,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:15,563 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-07-09 18:19:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:15,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202421423] [2021-07-09 18:19:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:15,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202421423] [2021-07-09 18:19:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202421423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4976323] [2021-07-09 18:19:15,717 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 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 [2021-07-09 18:19:15,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:19:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:16,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4976323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:16,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:16,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:19:16,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260840195] [2021-07-09 18:19:16,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:16,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:16,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:16,126 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:17,263 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-07-09 18:19:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:19:17,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:17,265 INFO L225 Difference]: With dead ends: 416 [2021-07-09 18:19:17,265 INFO L226 Difference]: Without dead ends: 374 [2021-07-09 18:19:17,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:19:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-09 18:19:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-07-09 18:19:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-07-09 18:19:17,268 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-07-09 18:19:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:17,269 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-07-09 18:19:17,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-07-09 18:19:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:17,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:17,269 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:17,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:17,485 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-07-09 18:19:17,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:17,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623573941] [2021-07-09 18:19:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:17,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623573941] [2021-07-09 18:19:17,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623573941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:17,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031531674] [2021-07-09 18:19:17,637 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 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 [2021-07-09 18:19:17,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:19:17,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:17,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031531674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:18,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:18,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:19:18,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257291748] [2021-07-09 18:19:18,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:18,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:18,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:18,004 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:19,092 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-07-09 18:19:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:19:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:19,093 INFO L225 Difference]: With dead ends: 478 [2021-07-09 18:19:19,093 INFO L226 Difference]: Without dead ends: 436 [2021-07-09 18:19:19,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1112.0ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-09 18:19:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-07-09 18:19:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-07-09 18:19:19,097 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-07-09 18:19:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:19,097 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-07-09 18:19:19,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-07-09 18:19:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:19,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:19,098 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:19,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:19:19,305 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-07-09 18:19:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:19,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814405116] [2021-07-09 18:19:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:19,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814405116] [2021-07-09 18:19:19,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814405116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825586768] [2021-07-09 18:19:19,451 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 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 [2021-07-09 18:19:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825586768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:19,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:19,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 18:19:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567474524] [2021-07-09 18:19:19,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:19,846 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:20,768 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-07-09 18:19:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:19:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:20,770 INFO L225 Difference]: With dead ends: 535 [2021-07-09 18:19:20,770 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 18:19:20,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:19:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 18:19:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-07-09 18:19:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-07-09 18:19:20,775 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-07-09 18:19:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:20,775 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-07-09 18:19:20,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-07-09 18:19:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:20,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:20,775 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:20,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:20,992 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-07-09 18:19:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:20,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019925937] [2021-07-09 18:19:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019925937] [2021-07-09 18:19:21,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019925937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616511523] [2021-07-09 18:19:21,128 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 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 [2021-07-09 18:19:21,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:21,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616511523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:21,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743883526] [2021-07-09 18:19:21,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:21,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:21,515 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:23,033 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-07-09 18:19:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:19:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:23,035 INFO L225 Difference]: With dead ends: 600 [2021-07-09 18:19:23,035 INFO L226 Difference]: Without dead ends: 580 [2021-07-09 18:19:23,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1406.9ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:19:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-09 18:19:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-07-09 18:19:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-07-09 18:19:23,041 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-07-09 18:19:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:23,041 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-07-09 18:19:23,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-07-09 18:19:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:23,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:23,041 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:23,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:19:23,245 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-07-09 18:19:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828701787] [2021-07-09 18:19:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:23,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:23,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828701787] [2021-07-09 18:19:23,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828701787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:23,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183287450] [2021-07-09 18:19:23,390 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 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 [2021-07-09 18:19:23,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:19:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183287450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:23,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:23,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:23,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639096134] [2021-07-09 18:19:23,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:23,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:23,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:23,782 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:25,295 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-07-09 18:19:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:19:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:25,297 INFO L225 Difference]: With dead ends: 651 [2021-07-09 18:19:25,297 INFO L226 Difference]: Without dead ends: 615 [2021-07-09 18:19:25,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1323.6ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:19:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-09 18:19:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-07-09 18:19:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-07-09 18:19:25,302 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-07-09 18:19:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:25,302 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-07-09 18:19:25,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-07-09 18:19:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:25,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:25,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:25,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:25,510 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-07-09 18:19:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762398045] [2021-07-09 18:19:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:25,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762398045] [2021-07-09 18:19:25,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762398045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495655760] [2021-07-09 18:19:25,675 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 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 [2021-07-09 18:19:25,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:26,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495655760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:26,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 18:19:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562814500] [2021-07-09 18:19:26,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:26,058 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:26,528 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-07-09 18:19:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:19:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:26,529 INFO L225 Difference]: With dead ends: 387 [2021-07-09 18:19:26,529 INFO L226 Difference]: Without dead ends: 373 [2021-07-09 18:19:26,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:19:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-09 18:19:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-07-09 18:19:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 18:19:26,534 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-09 18:19:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:26,534 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 18:19:26,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 18:19:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:26,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:26,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:26,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:19:26,744 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-07-09 18:19:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088953655] [2021-07-09 18:19:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:26,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:26,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088953655] [2021-07-09 18:19:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088953655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228527564] [2021-07-09 18:19:26,896 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 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 [2021-07-09 18:19:26,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:19:26,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:27,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228527564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:27,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:27,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 18:19:27,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184364613] [2021-07-09 18:19:27,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:27,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:27,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:27,304 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:28,098 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-07-09 18:19:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:19:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:28,099 INFO L225 Difference]: With dead ends: 462 [2021-07-09 18:19:28,099 INFO L226 Difference]: Without dead ends: 448 [2021-07-09 18:19:28,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:19:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-09 18:19:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-07-09 18:19:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-07-09 18:19:28,104 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-07-09 18:19:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:28,104 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-07-09 18:19:28,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-07-09 18:19:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:28,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:28,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:28,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:19:28,321 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-07-09 18:19:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:28,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130830627] [2021-07-09 18:19:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:28,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:28,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130830627] [2021-07-09 18:19:28,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130830627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:28,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754248434] [2021-07-09 18:19:28,489 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 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 [2021-07-09 18:19:28,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:19:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:28,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754248434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:28,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:28,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574507143] [2021-07-09 18:19:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:28,892 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:30,060 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-07-09 18:19:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:19:30,061 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:30,062 INFO L225 Difference]: With dead ends: 541 [2021-07-09 18:19:30,062 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 18:19:30,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1198.0ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 18:19:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-07-09 18:19:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 18:19:30,067 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-09 18:19:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:30,067 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 18:19:30,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 18:19:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:30,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:30,068 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:30,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:30,283 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-07-09 18:19:30,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:30,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697536449] [2021-07-09 18:19:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:30,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:30,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697536449] [2021-07-09 18:19:30,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697536449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055836587] [2021-07-09 18:19:30,418 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 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 [2021-07-09 18:19:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:30,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:30,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055836587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:30,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:30,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:30,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891966930] [2021-07-09 18:19:30,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:30,786 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:31,599 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-07-09 18:19:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:19:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:31,601 INFO L225 Difference]: With dead ends: 489 [2021-07-09 18:19:31,601 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 18:19:31,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:19:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 18:19:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-07-09 18:19:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 18:19:31,605 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-09 18:19:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:31,605 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 18:19:31,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 18:19:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:31,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:31,606 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:31,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:31,822 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:31,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-07-09 18:19:31,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:31,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415166175] [2021-07-09 18:19:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:31,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415166175] [2021-07-09 18:19:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415166175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814822503] [2021-07-09 18:19:31,979 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 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 [2021-07-09 18:19:31,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:32,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814822503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:32,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:32,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 18:19:32,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81648012] [2021-07-09 18:19:32,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:32,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:32,354 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:33,120 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-07-09 18:19:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:19:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:33,122 INFO L225 Difference]: With dead ends: 464 [2021-07-09 18:19:33,122 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 18:19:33,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:19:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 18:19:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-07-09 18:19:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-07-09 18:19:33,126 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-07-09 18:19:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:33,126 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-07-09 18:19:33,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-07-09 18:19:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:33,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:33,126 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:33,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:19:33,341 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-07-09 18:19:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:33,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398098400] [2021-07-09 18:19:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398098400] [2021-07-09 18:19:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398098400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177049809] [2021-07-09 18:19:33,488 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 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 [2021-07-09 18:19:33,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:19:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:33,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:33,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177049809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:33,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:33,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409668353] [2021-07-09 18:19:33,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:33,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:33,852 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:35,019 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-07-09 18:19:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:19:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:35,020 INFO L225 Difference]: With dead ends: 569 [2021-07-09 18:19:35,020 INFO L226 Difference]: Without dead ends: 537 [2021-07-09 18:19:35,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1154.3ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-09 18:19:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-07-09 18:19:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-07-09 18:19:35,025 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-07-09 18:19:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:35,025 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-07-09 18:19:35,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-07-09 18:19:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:35,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:35,026 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:35,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-07-09 18:19:35,241 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-07-09 18:19:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:35,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844462045] [2021-07-09 18:19:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:35,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844462045] [2021-07-09 18:19:35,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844462045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60414025] [2021-07-09 18:19:35,378 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 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 [2021-07-09 18:19:35,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:35,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:35,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60414025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:35,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:35,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:35,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263354584] [2021-07-09 18:19:35,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:35,747 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:36,671 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-07-09 18:19:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:19:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:36,673 INFO L225 Difference]: With dead ends: 627 [2021-07-09 18:19:36,673 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 18:19:36,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 933.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:19:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 18:19:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-07-09 18:19:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-07-09 18:19:36,678 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-07-09 18:19:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:36,678 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-07-09 18:19:36,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-07-09 18:19:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:36,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:36,679 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:36,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:36,879 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-07-09 18:19:36,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:36,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595800318] [2021-07-09 18:19:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:37,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595800318] [2021-07-09 18:19:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595800318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417700684] [2021-07-09 18:19:37,020 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 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 [2021-07-09 18:19:37,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:19:37,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:37,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417700684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:37,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:37,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 18:19:37,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550258334] [2021-07-09 18:19:37,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:37,349 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:38,057 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-07-09 18:19:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:19:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:38,059 INFO L225 Difference]: With dead ends: 564 [2021-07-09 18:19:38,059 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 18:19:38,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:19:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 18:19:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-07-09 18:19:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-07-09 18:19:38,064 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-07-09 18:19:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:38,064 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-07-09 18:19:38,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-07-09 18:19:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:38,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:38,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:38,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 18:19:38,276 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:38,276 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-07-09 18:19:38,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:38,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629793859] [2021-07-09 18:19:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:38,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629793859] [2021-07-09 18:19:38,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629793859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058784893] [2021-07-09 18:19:38,410 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 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 [2021-07-09 18:19:38,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:19:38,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:38,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058784893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:38,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:38,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:38,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104102851] [2021-07-09 18:19:38,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:38,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:38,757 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:40,222 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-07-09 18:19:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:19:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:40,224 INFO L225 Difference]: With dead ends: 680 [2021-07-09 18:19:40,224 INFO L226 Difference]: Without dead ends: 660 [2021-07-09 18:19:40,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1299.7ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:19:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-07-09 18:19:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-07-09 18:19:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-07-09 18:19:40,230 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-07-09 18:19:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:40,230 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-07-09 18:19:40,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-07-09 18:19:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:40,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:40,231 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:40,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:19:40,449 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-07-09 18:19:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441153720] [2021-07-09 18:19:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:40,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:40,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441153720] [2021-07-09 18:19:40,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441153720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:40,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299380162] [2021-07-09 18:19:40,603 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 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 [2021-07-09 18:19:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299380162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:40,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:40,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:40,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021137924] [2021-07-09 18:19:40,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:40,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:40,964 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:42,201 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-07-09 18:19:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:19:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:42,203 INFO L225 Difference]: With dead ends: 716 [2021-07-09 18:19:42,203 INFO L226 Difference]: Without dead ends: 680 [2021-07-09 18:19:42,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-09 18:19:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-07-09 18:19:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-07-09 18:19:42,209 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-07-09 18:19:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:42,209 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-07-09 18:19:42,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-07-09 18:19:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:42,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:42,210 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:42,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 18:19:42,410 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-07-09 18:19:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:42,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54580373] [2021-07-09 18:19:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:42,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:42,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54580373] [2021-07-09 18:19:42,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54580373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:42,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931218678] [2021-07-09 18:19:42,578 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 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 [2021-07-09 18:19:42,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:42,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:42,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931218678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:42,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:42,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 18:19:42,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202002817] [2021-07-09 18:19:42,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:42,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:42,950 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:43,577 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-07-09 18:19:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:19:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:43,579 INFO L225 Difference]: With dead ends: 658 [2021-07-09 18:19:43,579 INFO L226 Difference]: Without dead ends: 644 [2021-07-09 18:19:43,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 740.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:19:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-09 18:19:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-07-09 18:19:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-07-09 18:19:43,585 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-07-09 18:19:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:43,586 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-07-09 18:19:43,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-07-09 18:19:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:43,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:43,587 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:43,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 18:19:43,797 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-07-09 18:19:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:43,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943493049] [2021-07-09 18:19:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943493049] [2021-07-09 18:19:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943493049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441058687] [2021-07-09 18:19:43,943 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 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 [2021-07-09 18:19:43,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:19:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:43,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:44,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441058687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:44,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:44,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:19:44,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595323524] [2021-07-09 18:19:44,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:44,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:44,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:44,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:44,289 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:45,480 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-07-09 18:19:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:45,482 INFO L225 Difference]: With dead ends: 751 [2021-07-09 18:19:45,482 INFO L226 Difference]: Without dead ends: 731 [2021-07-09 18:19:45,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1135.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-09 18:19:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-07-09 18:19:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-07-09 18:19:45,489 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-07-09 18:19:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:45,489 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-07-09 18:19:45,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-07-09 18:19:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:45,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:45,490 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:45,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 18:19:45,705 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-07-09 18:19:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:45,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17173321] [2021-07-09 18:19:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:45,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17173321] [2021-07-09 18:19:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17173321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495026779] [2021-07-09 18:19:45,839 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 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 [2021-07-09 18:19:45,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:46,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495026779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:46,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:46,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:19:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316321212] [2021-07-09 18:19:46,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:46,181 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:46,748 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-07-09 18:19:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:19:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:46,750 INFO L225 Difference]: With dead ends: 681 [2021-07-09 18:19:46,750 INFO L226 Difference]: Without dead ends: 667 [2021-07-09 18:19:46,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:19:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-07-09 18:19:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-07-09 18:19:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-07-09 18:19:46,756 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-07-09 18:19:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:46,757 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-07-09 18:19:46,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-07-09 18:19:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:46,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:46,757 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:46,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:46,961 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-07-09 18:19:46,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:46,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634421682] [2021-07-09 18:19:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634421682] [2021-07-09 18:19:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634421682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011832877] [2021-07-09 18:19:47,112 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 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 [2021-07-09 18:19:47,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:19:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:47,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:47,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011832877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:47,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:47,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-09 18:19:47,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252731860] [2021-07-09 18:19:47,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:47,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:47,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:47,463 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:48,553 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-07-09 18:19:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:19:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:48,556 INFO L225 Difference]: With dead ends: 783 [2021-07-09 18:19:48,556 INFO L226 Difference]: Without dead ends: 769 [2021-07-09 18:19:48,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:19:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-09 18:19:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-07-09 18:19:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-07-09 18:19:48,562 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-07-09 18:19:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:48,562 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-07-09 18:19:48,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-07-09 18:19:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:48,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:48,563 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:48,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 18:19:48,771 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-07-09 18:19:48,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:48,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348626749] [2021-07-09 18:19:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:48,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:48,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348626749] [2021-07-09 18:19:48,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348626749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:48,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850858484] [2021-07-09 18:19:48,906 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 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 [2021-07-09 18:19:48,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:19:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850858484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:49,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:49,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:19:49,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803400900] [2021-07-09 18:19:49,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:49,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:49,242 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:50,702 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-07-09 18:19:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:19:50,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:50,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:50,705 INFO L225 Difference]: With dead ends: 813 [2021-07-09 18:19:50,705 INFO L226 Difference]: Without dead ends: 777 [2021-07-09 18:19:50,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1398.6ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:19:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-07-09 18:19:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-07-09 18:19:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-07-09 18:19:50,713 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-07-09 18:19:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:50,713 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-07-09 18:19:50,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-07-09 18:19:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:50,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:50,713 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:50,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:50,914 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-07-09 18:19:50,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:50,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566521522] [2021-07-09 18:19:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:51,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566521522] [2021-07-09 18:19:51,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566521522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916231557] [2021-07-09 18:19:51,090 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:19:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:51,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:51,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916231557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:51,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:51,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:19:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117326914] [2021-07-09 18:19:51,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:51,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:51,409 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:52,102 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-07-09 18:19:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:19:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:52,105 INFO L225 Difference]: With dead ends: 765 [2021-07-09 18:19:52,105 INFO L226 Difference]: Without dead ends: 739 [2021-07-09 18:19:52,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:19:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-09 18:19:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-07-09 18:19:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-07-09 18:19:52,112 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-07-09 18:19:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:52,112 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-07-09 18:19:52,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-07-09 18:19:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:19:52,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:52,113 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:52,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:19:52,323 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-07-09 18:19:52,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:52,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122283975] [2021-07-09 18:19:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:52,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:52,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122283975] [2021-07-09 18:19:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122283975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:52,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194513887] [2021-07-09 18:19:52,473 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 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 [2021-07-09 18:19:52,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:52,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:52,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194513887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:52,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:52,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:19:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454042849] [2021-07-09 18:19:52,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:52,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:52,784 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:53,702 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-07-09 18:19:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:19:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:19:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:53,705 INFO L225 Difference]: With dead ends: 878 [2021-07-09 18:19:53,705 INFO L226 Difference]: Without dead ends: 842 [2021-07-09 18:19:53,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:19:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-07-09 18:19:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-07-09 18:19:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-07-09 18:19:53,715 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-07-09 18:19:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:53,715 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-07-09 18:19:53,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-07-09 18:19:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:19:53,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:53,716 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:53,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:53,917 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-07-09 18:19:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:53,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037413322] [2021-07-09 18:19:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:54,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:54,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037413322] [2021-07-09 18:19:54,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037413322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:54,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932220156] [2021-07-09 18:19:54,101 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 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 [2021-07-09 18:19:54,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:19:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:54,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:54,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932220156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:54,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:54,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-09 18:19:54,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124481446] [2021-07-09 18:19:54,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:19:54,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:19:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:19:54,491 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:55,275 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-07-09 18:19:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:19:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:19:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:55,277 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:19:55,277 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 18:19:55,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:19:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 18:19:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-07-09 18:19:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-07-09 18:19:55,283 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-07-09 18:19:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:55,284 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-07-09 18:19:55,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-07-09 18:19:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:19:55,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:55,284 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:55,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 18:19:55,495 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-07-09 18:19:55,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:55,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857704939] [2021-07-09 18:19:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:55,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:55,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857704939] [2021-07-09 18:19:55,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857704939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613900526] [2021-07-09 18:19:55,669 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:19:55,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:55,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613900526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-09 18:19:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749949969] [2021-07-09 18:19:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:19:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:19:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:19:56,052 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:56,932 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-07-09 18:19:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:19:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:19:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:56,934 INFO L225 Difference]: With dead ends: 591 [2021-07-09 18:19:56,934 INFO L226 Difference]: Without dead ends: 567 [2021-07-09 18:19:56,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1011.9ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:19:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-09 18:19:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-07-09 18:19:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-07-09 18:19:56,940 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-07-09 18:19:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:56,940 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-07-09 18:19:56,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-07-09 18:19:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:19:56,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:56,941 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:57,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-09 18:19:57,141 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-07-09 18:19:57,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:57,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410963781] [2021-07-09 18:19:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410963781] [2021-07-09 18:19:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410963781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860046914] [2021-07-09 18:19:57,320 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 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 [2021-07-09 18:19:57,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:19:57,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:57,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860046914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:57,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:57,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-09 18:19:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308966943] [2021-07-09 18:19:57,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:19:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:19:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:19:57,717 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:58,862 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-07-09 18:19:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:19:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:58,864 INFO L225 Difference]: With dead ends: 627 [2021-07-09 18:19:58,864 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 18:19:58,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:19:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 18:19:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-07-09 18:19:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-07-09 18:19:58,871 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-07-09 18:19:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:58,871 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-07-09 18:19:58,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-07-09 18:19:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:19:58,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:58,872 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 18:19:59,081 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-07-09 18:19:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122417736] [2021-07-09 18:19:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:19:59,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:59,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122417736] [2021-07-09 18:19:59,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122417736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916657054] [2021-07-09 18:19:59,263 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 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 [2021-07-09 18:19:59,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:19:59,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:59,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:19:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916657054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:59,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:19:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223941927] [2021-07-09 18:19:59,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:19:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:19:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:19:59,704 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:00,447 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-07-09 18:20:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:20:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:00,449 INFO L225 Difference]: With dead ends: 685 [2021-07-09 18:20:00,449 INFO L226 Difference]: Without dead ends: 631 [2021-07-09 18:20:00,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:20:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-09 18:20:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-07-09 18:20:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-07-09 18:20:00,456 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-07-09 18:20:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:00,456 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-07-09 18:20:00,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-07-09 18:20:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:00,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:00,457 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:00,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:00,669 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-07-09 18:20:00,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:00,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308505591] [2021-07-09 18:20:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:20:00,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:00,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308505591] [2021-07-09 18:20:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308505591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:00,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614030084] [2021-07-09 18:20:00,832 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 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 [2021-07-09 18:20:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:00,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614030084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:01,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:01,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:01,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878952136] [2021-07-09 18:20:01,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:01,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:01,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:01,231 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:02,297 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-07-09 18:20:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:20:02,297 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:02,298 INFO L225 Difference]: With dead ends: 696 [2021-07-09 18:20:02,298 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:20:02,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1208.7ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:20:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:20:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-07-09 18:20:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-07-09 18:20:02,305 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-07-09 18:20:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:02,305 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-07-09 18:20:02,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-07-09 18:20:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:02,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:02,306 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:02,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:02,507 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-07-09 18:20:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:02,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405149927] [2021-07-09 18:20:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:20:02,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:02,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405149927] [2021-07-09 18:20:02,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405149927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:02,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90749080] [2021-07-09 18:20:02,678 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 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 [2021-07-09 18:20:02,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:02,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:03,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90749080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:03,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:03,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:03,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034929907] [2021-07-09 18:20:03,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:03,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:03,076 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:04,473 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-07-09 18:20:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:20:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:04,474 INFO L225 Difference]: With dead ends: 739 [2021-07-09 18:20:04,474 INFO L226 Difference]: Without dead ends: 713 [2021-07-09 18:20:04,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1308.1ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:20:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-09 18:20:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-07-09 18:20:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-07-09 18:20:04,481 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-07-09 18:20:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:04,481 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-07-09 18:20:04,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-07-09 18:20:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:04,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:04,482 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:04,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:04,697 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-07-09 18:20:04,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:04,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328232412] [2021-07-09 18:20:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:04,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:04,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328232412] [2021-07-09 18:20:04,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328232412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853807191] [2021-07-09 18:20:04,902 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 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 [2021-07-09 18:20:04,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:20:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853807191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:05,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:05,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-09 18:20:05,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213604729] [2021-07-09 18:20:05,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:20:05,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:20:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:20:05,316 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:06,104 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-07-09 18:20:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:20:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:06,106 INFO L225 Difference]: With dead ends: 724 [2021-07-09 18:20:06,106 INFO L226 Difference]: Without dead ends: 647 [2021-07-09 18:20:06,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1004.7ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:20:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-09 18:20:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-07-09 18:20:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-07-09 18:20:06,116 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-07-09 18:20:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:06,116 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-07-09 18:20:06,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-07-09 18:20:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:06,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:06,117 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:06,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:06,317 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-07-09 18:20:06,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:06,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039437005] [2021-07-09 18:20:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:06,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:06,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039437005] [2021-07-09 18:20:06,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039437005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:06,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862530496] [2021-07-09 18:20:06,461 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:06,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:06,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:06,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862530496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:06,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:06,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213547668] [2021-07-09 18:20:06,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:06,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:06,842 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:07,688 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-07-09 18:20:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:20:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:07,689 INFO L225 Difference]: With dead ends: 754 [2021-07-09 18:20:07,689 INFO L226 Difference]: Without dead ends: 702 [2021-07-09 18:20:07,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 951.4ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:20:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-09 18:20:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-07-09 18:20:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-07-09 18:20:07,696 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-07-09 18:20:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:07,696 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-07-09 18:20:07,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-07-09 18:20:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:07,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:07,697 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:07,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-09 18:20:07,913 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-07-09 18:20:07,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:07,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106528428] [2021-07-09 18:20:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:08,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106528428] [2021-07-09 18:20:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106528428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332708514] [2021-07-09 18:20:08,060 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:08,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:20:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:08,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332708514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:08,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:08,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:20:08,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628481151] [2021-07-09 18:20:08,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:20:08,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:20:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:20:08,706 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:10,313 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-07-09 18:20:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:20:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:10,315 INFO L225 Difference]: With dead ends: 840 [2021-07-09 18:20:10,316 INFO L226 Difference]: Without dead ends: 818 [2021-07-09 18:20:10,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1889.5ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:20:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-07-09 18:20:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-07-09 18:20:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-07-09 18:20:10,323 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-07-09 18:20:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:10,323 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-07-09 18:20:10,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-07-09 18:20:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:10,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:10,324 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:10,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:10,525 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-07-09 18:20:10,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:10,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356313728] [2021-07-09 18:20:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:10,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356313728] [2021-07-09 18:20:10,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356313728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359275536] [2021-07-09 18:20:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:10,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:10,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:11,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359275536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:11,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:11,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314688593] [2021-07-09 18:20:11,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:11,063 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:12,766 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-07-09 18:20:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:20:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:12,768 INFO L225 Difference]: With dead ends: 877 [2021-07-09 18:20:12,768 INFO L226 Difference]: Without dead ends: 847 [2021-07-09 18:20:12,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1599.7ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:20:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-09 18:20:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-07-09 18:20:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-07-09 18:20:12,776 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-07-09 18:20:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:12,776 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-07-09 18:20:12,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-07-09 18:20:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:12,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:12,777 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:12,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-07-09 18:20:12,978 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-07-09 18:20:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:12,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133447541] [2021-07-09 18:20:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:13,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:13,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133447541] [2021-07-09 18:20:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133447541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:13,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956576686] [2021-07-09 18:20:13,140 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:20:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956576686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:13,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:13,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:20:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069038413] [2021-07-09 18:20:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:13,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:13,590 INFO L87 Difference]: Start difference. First operand 593 states and 1282 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:14,334 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-07-09 18:20:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:20:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:14,336 INFO L225 Difference]: With dead ends: 753 [2021-07-09 18:20:14,336 INFO L226 Difference]: Without dead ends: 731 [2021-07-09 18:20:14,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 909.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:20:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-09 18:20:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-07-09 18:20:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-07-09 18:20:14,343 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-07-09 18:20:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:14,343 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-07-09 18:20:14,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-07-09 18:20:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:14,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:14,345 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:14,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 18:20:14,561 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-07-09 18:20:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:14,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824261823] [2021-07-09 18:20:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:14,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824261823] [2021-07-09 18:20:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824261823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667814980] [2021-07-09 18:20:14,746 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:14,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:20:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:15,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667814980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:15,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:15,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:20:15,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221832700] [2021-07-09 18:20:15,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:15,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:15,227 INFO L87 Difference]: Start difference. First operand 618 states and 1334 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:16,065 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-07-09 18:20:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:20:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:16,066 INFO L225 Difference]: With dead ends: 872 [2021-07-09 18:20:16,066 INFO L226 Difference]: Without dead ends: 839 [2021-07-09 18:20:16,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:20:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-07-09 18:20:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-07-09 18:20:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-07-09 18:20:16,074 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-07-09 18:20:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:16,074 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-07-09 18:20:16,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-07-09 18:20:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:16,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:16,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:16,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:16,293 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-07-09 18:20:16,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:16,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360941878] [2021-07-09 18:20:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:16,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:16,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360941878] [2021-07-09 18:20:16,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360941878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146304928] [2021-07-09 18:20:16,481 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:16,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:20:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:20:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146304928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:16,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:16,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:20:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543249293] [2021-07-09 18:20:16,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:16,967 INFO L87 Difference]: Start difference. First operand 617 states and 1332 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,813 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-07-09 18:20:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:20:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,815 INFO L225 Difference]: With dead ends: 1003 [2021-07-09 18:20:17,815 INFO L226 Difference]: Without dead ends: 970 [2021-07-09 18:20:17,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:20:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-07-09 18:20:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-07-09 18:20:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-07-09 18:20:17,823 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-07-09 18:20:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,823 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-07-09 18:20:17,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-07-09 18:20:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:17,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,824 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:18,025 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-07-09 18:20:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117069094] [2021-07-09 18:20:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:20:18,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:18,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117069094] [2021-07-09 18:20:18,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117069094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:18,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910851124] [2021-07-09 18:20:18,166 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:18,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:18,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:18,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910851124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:18,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310956649] [2021-07-09 18:20:18,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:18,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:18,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:18,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:18,562 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:19,322 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-07-09 18:20:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:20:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:19,323 INFO L225 Difference]: With dead ends: 675 [2021-07-09 18:20:19,323 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 18:20:19,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:20:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 18:20:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-07-09 18:20:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-07-09 18:20:19,329 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-07-09 18:20:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:19,329 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-07-09 18:20:19,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-07-09 18:20:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:19,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:19,330 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:19,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,531 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-07-09 18:20:19,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:19,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248000971] [2021-07-09 18:20:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:20:19,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:19,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248000971] [2021-07-09 18:20:19,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248000971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249700518] [2021-07-09 18:20:19,691 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:19,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:19,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:19,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249700518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:20,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:20,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695847249] [2021-07-09 18:20:20,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:20,105 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:21,219 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-07-09 18:20:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:20:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:21,220 INFO L225 Difference]: With dead ends: 703 [2021-07-09 18:20:21,220 INFO L226 Difference]: Without dead ends: 679 [2021-07-09 18:20:21,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1260.9ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:20:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-09 18:20:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-07-09 18:20:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-07-09 18:20:21,227 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-07-09 18:20:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:21,227 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-07-09 18:20:21,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-07-09 18:20:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:21,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:21,227 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:21,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-09 18:20:21,437 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-07-09 18:20:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350392699] [2021-07-09 18:20:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:20:21,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350392699] [2021-07-09 18:20:21,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350392699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457025076] [2021-07-09 18:20:21,603 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:21,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:21,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:21,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457025076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:22,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:22,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-09 18:20:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590316811] [2021-07-09 18:20:22,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:22,004 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:23,386 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-07-09 18:20:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:20:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:23,387 INFO L225 Difference]: With dead ends: 756 [2021-07-09 18:20:23,387 INFO L226 Difference]: Without dead ends: 730 [2021-07-09 18:20:23,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:20:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-07-09 18:20:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-07-09 18:20:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-07-09 18:20:23,393 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-07-09 18:20:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:23,393 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-07-09 18:20:23,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-07-09 18:20:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:23,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:23,394 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 18:20:23,600 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-07-09 18:20:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007408418] [2021-07-09 18:20:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:23,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007408418] [2021-07-09 18:20:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007408418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452112856] [2021-07-09 18:20:23,781 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:24,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452112856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:24,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:24,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:20:24,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337914656] [2021-07-09 18:20:24,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:24,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:24,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:24,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:24,202 INFO L87 Difference]: Start difference. First operand 457 states and 910 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:24,869 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-07-09 18:20:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:20:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:24,870 INFO L225 Difference]: With dead ends: 708 [2021-07-09 18:20:24,870 INFO L226 Difference]: Without dead ends: 683 [2021-07-09 18:20:24,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:20:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-09 18:20:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-07-09 18:20:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-07-09 18:20:24,876 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-07-09 18:20:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:24,876 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-07-09 18:20:24,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-07-09 18:20:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:24,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:24,877 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-09 18:20:25,089 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-07-09 18:20:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33262576] [2021-07-09 18:20:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:25,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33262576] [2021-07-09 18:20:25,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33262576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017243183] [2021-07-09 18:20:25,302 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:25,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017243183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:25,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:20:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355679184] [2021-07-09 18:20:25,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:25,720 INFO L87 Difference]: Start difference. First operand 517 states and 1030 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:26,638 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-07-09 18:20:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:20:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:26,639 INFO L225 Difference]: With dead ends: 722 [2021-07-09 18:20:26,639 INFO L226 Difference]: Without dead ends: 693 [2021-07-09 18:20:26,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1128.8ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:20:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-07-09 18:20:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-07-09 18:20:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-07-09 18:20:26,643 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-07-09 18:20:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:26,643 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-07-09 18:20:26,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-07-09 18:20:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:20:26,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:26,643 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:26,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:26,849 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-07-09 18:20:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:26,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996835835] [2021-07-09 18:20:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:27,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:27,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996835835] [2021-07-09 18:20:27,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996835835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:27,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488574931] [2021-07-09 18:20:27,048 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:27,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:20:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488574931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:27,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-09 18:20:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334830614] [2021-07-09 18:20:27,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:20:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:20:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:20:27,469 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:28,427 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-07-09 18:20:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:20:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:20:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:28,428 INFO L225 Difference]: With dead ends: 368 [2021-07-09 18:20:28,428 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 18:20:28,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:20:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 18:20:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 18:20:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 18:20:28,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-07-09 18:20:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:28,429 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 18:20:28,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 18:20:28,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 18:20:28,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-09 18:20:28,638 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:20:28,640 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:20:28 BasicIcfg [2021-07-09 18:20:28,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:20:28,641 INFO L168 Benchmark]: Toolchain (without parser) took 107570.10 ms. Allocated memory was 187.7 MB in the beginning and 280.0 MB in the end (delta: 92.3 MB). Free memory was 166.8 MB in the beginning and 132.3 MB in the end (delta: 34.6 MB). Peak memory consumption was 127.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 167.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.34 ms. Allocated memory is still 187.7 MB. Free memory was 166.7 MB in the beginning and 165.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L168 Benchmark]: Boogie Preprocessor took 14.12 ms. Allocated memory is still 187.7 MB. Free memory was 165.3 MB in the beginning and 164.3 MB in the end (delta: 978.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L168 Benchmark]: RCFGBuilder took 247.05 ms. Allocated memory is still 187.7 MB. Free memory was 164.2 MB in the beginning and 152.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L168 Benchmark]: TraceAbstraction took 107285.40 ms. Allocated memory was 187.7 MB in the beginning and 280.0 MB in the end (delta: 92.3 MB). Free memory was 152.0 MB in the beginning and 132.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 112.9 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:28,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 167.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.34 ms. Allocated memory is still 187.7 MB. Free memory was 166.7 MB in the beginning and 165.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.12 ms. Allocated memory is still 187.7 MB. Free memory was 165.3 MB in the beginning and 164.3 MB in the end (delta: 978.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 247.05 ms. Allocated memory is still 187.7 MB. Free memory was 164.2 MB in the beginning and 152.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 107285.40 ms. Allocated memory was 187.7 MB in the beginning and 280.0 MB in the end (delta: 92.3 MB). Free memory was 152.0 MB in the beginning and 132.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 112.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 107197.0ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 42.7ms, AutomataDifference: 58906.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8393 SDslu, 14376 SDs, 0 SdLazy, 46893 SolverSat, 4165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17153.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 63220.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 360.2ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 164.8ms SsaConstructionTime, 484.3ms SatisfiabilityAnalysisTime, 32900.4ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...