/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/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:26:24,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:26:24,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:26:24,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:26:24,247 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 [2021-08-12 19:26:24,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:26:24,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:26:24,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:26:24,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:26:24,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:26:24,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:26:24,273 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:26:24,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:26:24,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:26:24,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:26:24,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:26:24,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:26:24,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:26:24,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:26:24,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:26:24,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:26:24,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:26:24,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:26:24,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:26:24,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:26:24,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:26:24,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:26:24,571 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:26:24,572 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:26:24,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2021-08-12 19:26:24,573 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2021-08-12 19:26:24,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:26:24,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:26:24,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:26:24,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:26:24,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:26:24,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:26:24,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:26:24,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:26:24,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:26:24,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... [2021-08-12 19:26:24,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:26:24,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:26:24,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:26:24,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:26:24,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:26:24,716 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:26:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:26:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:26:24,716 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:26:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:26:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:26:24,717 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:26:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:26:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:26:24,718 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:26:24,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:26:24,877 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:26:24,879 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:26:24 BoogieIcfgContainer [2021-08-12 19:26:24,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:26:24,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:26:24,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:26:24,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:26:24,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:26:24" (1/2) ... [2021-08-12 19:26:24,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670b695 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:26:24, skipping insertion in model container [2021-08-12 19:26:24,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:26:24" (2/2) ... [2021-08-12 19:26:24,886 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2021-08-12 19:26:24,890 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:26:24,890 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:26:24,891 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:26:24,915 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:26:24,932 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:26:24,950 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:26:24,950 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:26:24,950 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:26:24,950 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:26:24,950 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:26:24,951 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:26:24,951 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:26:24,951 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:26:24,958 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-08-12 19:26:24,968 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:26:24,975 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:24,975 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:24,975 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1451168716, now seen corresponding path program 1 times [2021-08-12 19:26:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:24,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140953344] [2021-08-12 19:26:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:25,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:25,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140953344] [2021-08-12 19:26:25,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140953344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:26:25,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:26:25,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:26:25,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375838180] [2021-08-12 19:26:25,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:26:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:26:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:26:25,153 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:25,180 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-08-12 19:26:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:26:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-08-12 19:26:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:25,189 INFO L225 Difference]: With dead ends: 61 [2021-08-12 19:26:25,189 INFO L226 Difference]: Without dead ends: 50 [2021-08-12 19:26:25,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:26:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-12 19:26:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-08-12 19:26:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-08-12 19:26:25,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-08-12 19:26:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:25,238 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-08-12 19:26:25,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-08-12 19:26:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:26:25,239 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:25,239 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:25,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:26:25,241 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash -334624586, now seen corresponding path program 1 times [2021-08-12 19:26:25,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:25,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563367494] [2021-08-12 19:26:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563367494] [2021-08-12 19:26:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563367494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:25,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379164675] [2021-08-12 19:26:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:26:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:25,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379164675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:25,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:25,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-12 19:26:25,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646503335] [2021-08-12 19:26:25,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:26:25,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:26:25,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:26:25,622 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:25,799 INFO L93 Difference]: Finished difference Result 81 states and 143 transitions. [2021-08-12 19:26:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:26:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 16 [2021-08-12 19:26:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:25,803 INFO L225 Difference]: With dead ends: 81 [2021-08-12 19:26:25,804 INFO L226 Difference]: Without dead ends: 68 [2021-08-12 19:26:25,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:26:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-12 19:26:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-08-12 19:26:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-08-12 19:26:25,820 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-08-12 19:26:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:25,820 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-08-12 19:26:25,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-08-12 19:26:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:26:25,822 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:25,822 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:26,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:26:26,045 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 368180722, now seen corresponding path program 1 times [2021-08-12 19:26:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431152249] [2021-08-12 19:26:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:26,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431152249] [2021-08-12 19:26:26,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431152249] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:26:26,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:26:26,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:26:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557810314] [2021-08-12 19:26:26,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:26:26,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:26:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:26:26,109 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:26,196 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2021-08-12 19:26:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:26:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-12 19:26:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:26,201 INFO L225 Difference]: With dead ends: 86 [2021-08-12 19:26:26,201 INFO L226 Difference]: Without dead ends: 66 [2021-08-12 19:26:26,202 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:26:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-12 19:26:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-08-12 19:26:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-08-12 19:26:26,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-08-12 19:26:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:26,216 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-08-12 19:26:26,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-08-12 19:26:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:26:26,217 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:26,217 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:26,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:26:26,217 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -896747138, now seen corresponding path program 2 times [2021-08-12 19:26:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:26,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069136976] [2021-08-12 19:26:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:26,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069136976] [2021-08-12 19:26:26,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069136976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:26:26,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:26:26,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:26:26,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671239269] [2021-08-12 19:26:26,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:26:26,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:26:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:26:26,281 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:26,350 INFO L93 Difference]: Finished difference Result 66 states and 118 transitions. [2021-08-12 19:26:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:26:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-12 19:26:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:26,357 INFO L225 Difference]: With dead ends: 66 [2021-08-12 19:26:26,357 INFO L226 Difference]: Without dead ends: 51 [2021-08-12 19:26:26,357 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:26:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-12 19:26:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-08-12 19:26:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-08-12 19:26:26,367 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-08-12 19:26:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:26,367 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-08-12 19:26:26,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-08-12 19:26:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:26:26,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:26,368 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:26,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:26:26,369 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2014322076, now seen corresponding path program 2 times [2021-08-12 19:26:26,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:26,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113690542] [2021-08-12 19:26:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:26,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113690542] [2021-08-12 19:26:26,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113690542] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:26:26,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:26:26,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:26:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366180724] [2021-08-12 19:26:26,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:26:26,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:26:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:26:26,429 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:26,517 INFO L93 Difference]: Finished difference Result 64 states and 112 transitions. [2021-08-12 19:26:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:26:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-12 19:26:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:26,519 INFO L225 Difference]: With dead ends: 64 [2021-08-12 19:26:26,519 INFO L226 Difference]: Without dead ends: 49 [2021-08-12 19:26:26,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:26:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-12 19:26:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-08-12 19:26:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-08-12 19:26:26,529 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-08-12 19:26:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:26,529 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-08-12 19:26:26,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-08-12 19:26:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:26:26,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:26,530 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:26,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:26:26,531 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash -374734348, now seen corresponding path program 1 times [2021-08-12 19:26:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:26,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427113636] [2021-08-12 19:26:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:26,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427113636] [2021-08-12 19:26:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427113636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56022551] [2021-08-12 19:26:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:26,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:26:26,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:26,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:26,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:26,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-08-12 19:26:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:26:26,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:26,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:26,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:26,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-08-12 19:26:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56022551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:26,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:26,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 19:26:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764983611] [2021-08-12 19:26:26,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:26:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:26:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:26:26,772 INFO L87 Difference]: Start difference. First operand 43 states and 78 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) [2021-08-12 19:26:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:26,802 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2021-08-12 19:26:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:26:26,803 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 [2021-08-12 19:26:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:26,804 INFO L225 Difference]: With dead ends: 101 [2021-08-12 19:26:26,804 INFO L226 Difference]: Without dead ends: 92 [2021-08-12 19:26:26,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:26:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-12 19:26:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-08-12 19:26:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 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) [2021-08-12 19:26:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-08-12 19:26:26,820 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 18 [2021-08-12 19:26:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:26,820 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-08-12 19:26:26,820 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) [2021-08-12 19:26:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-08-12 19:26:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:26:26,824 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:26,825 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:27,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:27,048 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1555556108, now seen corresponding path program 2 times [2021-08-12 19:26:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:27,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975356988] [2021-08-12 19:26:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975356988] [2021-08-12 19:26:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975356988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:26:27,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:26:27,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:26:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881658118] [2021-08-12 19:26:27,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:26:27,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:26:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:26:27,074 INFO L87 Difference]: Start difference. First operand 69 states and 139 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) [2021-08-12 19:26:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:27,102 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-08-12 19:26:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:26:27,103 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 [2021-08-12 19:26:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:27,104 INFO L225 Difference]: With dead ends: 120 [2021-08-12 19:26:27,104 INFO L226 Difference]: Without dead ends: 111 [2021-08-12 19:26:27,104 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:26:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-12 19:26:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-08-12 19:26:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 181 transitions. [2021-08-12 19:26:27,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 181 transitions. Word has length 18 [2021-08-12 19:26:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:27,111 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 181 transitions. [2021-08-12 19:26:27,111 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) [2021-08-12 19:26:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 181 transitions. [2021-08-12 19:26:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:27,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:27,112 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:27,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:26:27,113 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1351545482, now seen corresponding path program 3 times [2021-08-12 19:26:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:27,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661838500] [2021-08-12 19:26:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:27,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:27,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661838500] [2021-08-12 19:26:27,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661838500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:27,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233180331] [2021-08-12 19:26:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:27,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:26:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:27,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233180331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:27,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:27,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-12 19:26:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924501531] [2021-08-12 19:26:27,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:26:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:26:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:26:27,301 INFO L87 Difference]: Start difference. First operand 86 states and 181 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:27,666 INFO L93 Difference]: Finished difference Result 226 states and 465 transitions. [2021-08-12 19:26:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:26:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-08-12 19:26:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:27,669 INFO L225 Difference]: With dead ends: 226 [2021-08-12 19:26:27,669 INFO L226 Difference]: Without dead ends: 213 [2021-08-12 19:26:27,670 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:26:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-12 19:26:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 88. [2021-08-12 19:26:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-08-12 19:26:27,680 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 20 [2021-08-12 19:26:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:27,681 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-08-12 19:26:27,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-08-12 19:26:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:27,681 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:27,682 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:27,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:27,897 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash -265509966, now seen corresponding path program 4 times [2021-08-12 19:26:27,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:27,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254942668] [2021-08-12 19:26:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:27,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:27,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254942668] [2021-08-12 19:26:27,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254942668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:27,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714770919] [2021-08-12 19:26:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:27,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:27,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:28,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714770919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:28,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:28,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:26:28,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944258276] [2021-08-12 19:26:28,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:26:28,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:26:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:26:28,093 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:28,477 INFO L93 Difference]: Finished difference Result 272 states and 529 transitions. [2021-08-12 19:26:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:26:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-08-12 19:26:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:28,479 INFO L225 Difference]: With dead ends: 272 [2021-08-12 19:26:28,479 INFO L226 Difference]: Without dead ends: 234 [2021-08-12 19:26:28,480 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:26:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-12 19:26:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 108. [2021-08-12 19:26:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 107 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 230 transitions. [2021-08-12 19:26:28,488 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 230 transitions. Word has length 20 [2021-08-12 19:26:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:28,489 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 230 transitions. [2021-08-12 19:26:28,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 230 transitions. [2021-08-12 19:26:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:28,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:28,490 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:28,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:28,705 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash -698013310, now seen corresponding path program 5 times [2021-08-12 19:26:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:28,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432223562] [2021-08-12 19:26:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:28,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432223562] [2021-08-12 19:26:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432223562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352819449] [2021-08-12 19:26:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:28,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:26:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352819449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:28,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:28,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:26:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197429473] [2021-08-12 19:26:28,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:26:28,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:26:28,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:26:28,887 INFO L87 Difference]: Start difference. First operand 108 states and 230 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:29,202 INFO L93 Difference]: Finished difference Result 260 states and 523 transitions. [2021-08-12 19:26:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:26:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-08-12 19:26:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:29,204 INFO L225 Difference]: With dead ends: 260 [2021-08-12 19:26:29,204 INFO L226 Difference]: Without dead ends: 236 [2021-08-12 19:26:29,205 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-12 19:26:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 131. [2021-08-12 19:26:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.230769230769231) internal successors, (290), 130 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 290 transitions. [2021-08-12 19:26:29,214 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 290 transitions. Word has length 20 [2021-08-12 19:26:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:29,214 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 290 transitions. [2021-08-12 19:26:29,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 290 transitions. [2021-08-12 19:26:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:29,215 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:29,215 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:26:29,437 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2081911392, now seen corresponding path program 6 times [2021-08-12 19:26:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:29,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074124335] [2021-08-12 19:26:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:29,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:29,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074124335] [2021-08-12 19:26:29,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074124335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:29,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100545389] [2021-08-12 19:26:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:29,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:26:29,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:29,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:29,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100545389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:29,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:29,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:26:29,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703390614] [2021-08-12 19:26:29,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:26:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:29,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:26:29,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:26:29,655 INFO L87 Difference]: Start difference. First operand 131 states and 290 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:29,970 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-08-12 19:26:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:26:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-08-12 19:26:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:29,972 INFO L225 Difference]: With dead ends: 221 [2021-08-12 19:26:29,972 INFO L226 Difference]: Without dead ends: 204 [2021-08-12 19:26:29,973 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:26:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-12 19:26:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2021-08-12 19:26:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.212121212121212) internal successors, (292), 132 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 292 transitions. [2021-08-12 19:26:29,983 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 292 transitions. Word has length 20 [2021-08-12 19:26:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:29,983 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 292 transitions. [2021-08-12 19:26:29,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 292 transitions. [2021-08-12 19:26:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:29,984 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:29,984 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:30,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:30,205 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1866660490, now seen corresponding path program 7 times [2021-08-12 19:26:30,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:30,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168576778] [2021-08-12 19:26:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:30,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:30,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168576778] [2021-08-12 19:26:30,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168576778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:30,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110981509] [2021-08-12 19:26:30,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110981509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:26:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489364882] [2021-08-12 19:26:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:26:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:26:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:26:30,423 INFO L87 Difference]: Start difference. First operand 133 states and 292 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:30,838 INFO L93 Difference]: Finished difference Result 324 states and 666 transitions. [2021-08-12 19:26:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:26:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-08-12 19:26:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:30,841 INFO L225 Difference]: With dead ends: 324 [2021-08-12 19:26:30,841 INFO L226 Difference]: Without dead ends: 311 [2021-08-12 19:26:30,841 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:26:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-12 19:26:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 176. [2021-08-12 19:26:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.297142857142857) internal successors, (402), 175 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 402 transitions. [2021-08-12 19:26:30,853 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 402 transitions. Word has length 20 [2021-08-12 19:26:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:30,853 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 402 transitions. [2021-08-12 19:26:30,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 402 transitions. [2021-08-12 19:26:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:30,854 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:30,854 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:31,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:31,077 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:31,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1163855182, now seen corresponding path program 8 times [2021-08-12 19:26:31,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:31,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153596840] [2021-08-12 19:26:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:31,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153596840] [2021-08-12 19:26:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153596840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458940690] [2021-08-12 19:26:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:31,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:31,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458940690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:31,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:31,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:26:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516756785] [2021-08-12 19:26:31,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:26:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:26:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:26:31,255 INFO L87 Difference]: Start difference. First operand 176 states and 402 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:31,563 INFO L93 Difference]: Finished difference Result 263 states and 551 transitions. [2021-08-12 19:26:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:26:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-08-12 19:26:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:31,565 INFO L225 Difference]: With dead ends: 263 [2021-08-12 19:26:31,565 INFO L226 Difference]: Without dead ends: 242 [2021-08-12 19:26:31,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:26:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-12 19:26:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2021-08-12 19:26:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3259668508287294) internal successors, (421), 181 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) [2021-08-12 19:26:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 421 transitions. [2021-08-12 19:26:31,578 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 421 transitions. Word has length 20 [2021-08-12 19:26:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:31,579 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 421 transitions. [2021-08-12 19:26:31,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 421 transitions. [2021-08-12 19:26:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:31,581 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:31,581 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:31,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 19:26:31,797 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash 482286172, now seen corresponding path program 9 times [2021-08-12 19:26:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:31,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838161342] [2021-08-12 19:26:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:31,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838161342] [2021-08-12 19:26:31,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838161342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484752589] [2021-08-12 19:26:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:31,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:26:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:32,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484752589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:32,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:32,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:26:32,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636638740] [2021-08-12 19:26:32,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:26:32,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:26:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:26:32,004 INFO L87 Difference]: Start difference. First operand 182 states and 421 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:32,286 INFO L93 Difference]: Finished difference Result 313 states and 645 transitions. [2021-08-12 19:26:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:26:32,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-08-12 19:26:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:32,288 INFO L225 Difference]: With dead ends: 313 [2021-08-12 19:26:32,288 INFO L226 Difference]: Without dead ends: 296 [2021-08-12 19:26:32,288 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:26:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-12 19:26:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2021-08-12 19:26:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.314917127071823) internal successors, (419), 181 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 419 transitions. [2021-08-12 19:26:32,300 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 419 transitions. Word has length 20 [2021-08-12 19:26:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:32,300 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 419 transitions. [2021-08-12 19:26:32,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 419 transitions. [2021-08-12 19:26:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:26:32,301 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:32,301 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:32,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:32,517 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash -24060094, now seen corresponding path program 10 times [2021-08-12 19:26:32,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:32,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106151781] [2021-08-12 19:26:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:32,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:32,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106151781] [2021-08-12 19:26:32,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106151781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:32,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890118595] [2021-08-12 19:26:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:32,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:32,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:26:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890118595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:32,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:32,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:26:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166179307] [2021-08-12 19:26:32,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:26:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:26:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:26:32,713 INFO L87 Difference]: Start difference. First operand 182 states and 419 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:33,038 INFO L93 Difference]: Finished difference Result 309 states and 647 transitions. [2021-08-12 19:26:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:26:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-08-12 19:26:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:33,041 INFO L225 Difference]: With dead ends: 309 [2021-08-12 19:26:33,041 INFO L226 Difference]: Without dead ends: 284 [2021-08-12 19:26:33,041 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:26:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-12 19:26:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 193. [2021-08-12 19:26:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3125) internal successors, (444), 192 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 444 transitions. [2021-08-12 19:26:33,054 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 444 transitions. Word has length 20 [2021-08-12 19:26:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:33,054 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 444 transitions. [2021-08-12 19:26:33,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 444 transitions. [2021-08-12 19:26:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:26:33,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:33,055 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:33,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:26:33,273 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1616828084, now seen corresponding path program 11 times [2021-08-12 19:26:33,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:33,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450410468] [2021-08-12 19:26:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:33,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450410468] [2021-08-12 19:26:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450410468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479498329] [2021-08-12 19:26:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:33,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:26:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:33,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-08-12 19:26:33,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:33,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:33,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:33,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-08-12 19:26:33,487 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 19:26:33,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-08-12 19:26:33,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:33,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:33,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:26:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2021-08-12 19:26:33,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:33,510 INFO L628 ElimStorePlain]: treesize reduction 8, result has 27.3 percent of original size [2021-08-12 19:26:33,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:33,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:3 [2021-08-12 19:26:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479498329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:33,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:33,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-08-12 19:26:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882850323] [2021-08-12 19:26:33,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:26:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:26:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:33,518 INFO L87 Difference]: Start difference. First operand 193 states and 444 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:33,629 INFO L93 Difference]: Finished difference Result 374 states and 811 transitions. [2021-08-12 19:26:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:26:33,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-08-12 19:26:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:33,632 INFO L225 Difference]: With dead ends: 374 [2021-08-12 19:26:33,632 INFO L226 Difference]: Without dead ends: 365 [2021-08-12 19:26:33,632 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-12 19:26:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 263. [2021-08-12 19:26:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.377862595419847) internal successors, (623), 262 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 623 transitions. [2021-08-12 19:26:33,651 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 623 transitions. Word has length 22 [2021-08-12 19:26:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:33,651 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 623 transitions. [2021-08-12 19:26:33,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 623 transitions. [2021-08-12 19:26:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:26:33,652 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:33,652 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:33,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:26:33,877 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -462338892, now seen corresponding path program 12 times [2021-08-12 19:26:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:33,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423636207] [2021-08-12 19:26:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:33,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:33,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423636207] [2021-08-12 19:26:33,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423636207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:33,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896086879] [2021-08-12 19:26:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:33,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:26:33,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:26:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:34,002 INFO L446 ElimStorePlain]: Different costs {1=[f], 3=[f_inv]} [2021-08-12 19:26:34,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:34,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 38 [2021-08-12 19:26:34,017 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:26:34,030 INFO L628 ElimStorePlain]: treesize reduction 9, result has 71.9 percent of original size [2021-08-12 19:26:34,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-08-12 19:26:34,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:34,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,044 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:3 [2021-08-12 19:26:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:34,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896086879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:34,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:34,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-08-12 19:26:34,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451721669] [2021-08-12 19:26:34,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:26:34,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:26:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:34,055 INFO L87 Difference]: Start difference. First operand 263 states and 623 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:34,188 INFO L93 Difference]: Finished difference Result 407 states and 919 transitions. [2021-08-12 19:26:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:26:34,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-08-12 19:26:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:34,191 INFO L225 Difference]: With dead ends: 407 [2021-08-12 19:26:34,191 INFO L226 Difference]: Without dead ends: 396 [2021-08-12 19:26:34,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-12 19:26:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 318. [2021-08-12 19:26:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.444794952681388) internal successors, (775), 317 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 775 transitions. [2021-08-12 19:26:34,213 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 775 transitions. Word has length 22 [2021-08-12 19:26:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:34,213 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 775 transitions. [2021-08-12 19:26:34,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 775 transitions. [2021-08-12 19:26:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:26:34,214 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:34,214 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:34,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:34,437 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2570572, now seen corresponding path program 13 times [2021-08-12 19:26:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:34,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313533576] [2021-08-12 19:26:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:34,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313533576] [2021-08-12 19:26:34,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313533576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074399701] [2021-08-12 19:26:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:34,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:34,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-08-12 19:26:34,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:34,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-08-12 19:26:34,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:26:34,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2021-08-12 19:26:34,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,650 INFO L628 ElimStorePlain]: treesize reduction 21, result has 12.5 percent of original size [2021-08-12 19:26:34,651 INFO L518 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2021-08-12 19:26:34,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:34,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:3 [2021-08-12 19:26:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:34,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074399701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:34,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:34,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-08-12 19:26:34,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963750574] [2021-08-12 19:26:34,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:26:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:34,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:26:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:34,663 INFO L87 Difference]: Start difference. First operand 318 states and 775 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:34,801 INFO L93 Difference]: Finished difference Result 501 states and 1145 transitions. [2021-08-12 19:26:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:26:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-08-12 19:26:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:34,804 INFO L225 Difference]: With dead ends: 501 [2021-08-12 19:26:34,804 INFO L226 Difference]: Without dead ends: 492 [2021-08-12 19:26:34,804 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:26:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-12 19:26:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 374. [2021-08-12 19:26:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.474530831099196) internal successors, (923), 373 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 923 transitions. [2021-08-12 19:26:34,831 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 923 transitions. Word has length 22 [2021-08-12 19:26:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:34,831 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 923 transitions. [2021-08-12 19:26:34,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 923 transitions. [2021-08-12 19:26:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:34,832 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:34,832 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:35,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:26:35,055 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1932504778, now seen corresponding path program 14 times [2021-08-12 19:26:35,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:35,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533932183] [2021-08-12 19:26:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:35,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:35,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533932183] [2021-08-12 19:26:35,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533932183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:35,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880280772] [2021-08-12 19:26:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:35,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:35,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880280772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:35,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:35,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:26:35,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958152023] [2021-08-12 19:26:35,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:26:35,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:35,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:26:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:26:35,314 INFO L87 Difference]: Start difference. First operand 374 states and 923 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-08-12 19:26:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:35,983 INFO L93 Difference]: Finished difference Result 680 states and 1554 transitions. [2021-08-12 19:26:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:26:35,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 24 [2021-08-12 19:26:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:35,988 INFO L225 Difference]: With dead ends: 680 [2021-08-12 19:26:35,988 INFO L226 Difference]: Without dead ends: 665 [2021-08-12 19:26:35,988 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:26:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-12 19:26:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 325. [2021-08-12 19:26:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.450617283950617) internal successors, (794), 324 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 794 transitions. [2021-08-12 19:26:36,043 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 794 transitions. Word has length 24 [2021-08-12 19:26:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:36,044 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 794 transitions. [2021-08-12 19:26:36,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-08-12 19:26:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 794 transitions. [2021-08-12 19:26:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:36,045 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:36,045 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:36,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:36,245 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1929426830, now seen corresponding path program 15 times [2021-08-12 19:26:36,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:36,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214214760] [2021-08-12 19:26:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214214760] [2021-08-12 19:26:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214214760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044412075] [2021-08-12 19:26:36,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:36,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:26:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044412075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:36,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:36,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:26:36,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221685767] [2021-08-12 19:26:36,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:26:36,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:26:36,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:26:36,502 INFO L87 Difference]: Start difference. First operand 325 states and 794 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:37,351 INFO L93 Difference]: Finished difference Result 801 states and 1717 transitions. [2021-08-12 19:26:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:26:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-08-12 19:26:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:37,355 INFO L225 Difference]: With dead ends: 801 [2021-08-12 19:26:37,355 INFO L226 Difference]: Without dead ends: 742 [2021-08-12 19:26:37,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:26:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-12 19:26:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 342. [2021-08-12 19:26:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.4134897360703813) internal successors, (823), 341 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 823 transitions. [2021-08-12 19:26:37,399 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 823 transitions. Word has length 24 [2021-08-12 19:26:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:37,399 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 823 transitions. [2021-08-12 19:26:37,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 823 transitions. [2021-08-12 19:26:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:37,400 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:37,400 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:37,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:26:37,623 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1265887354, now seen corresponding path program 16 times [2021-08-12 19:26:37,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:37,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667275320] [2021-08-12 19:26:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:37,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667275320] [2021-08-12 19:26:37,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667275320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777484441] [2021-08-12 19:26:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:26:37,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:37,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:37,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777484441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:37,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:37,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:26:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395918168] [2021-08-12 19:26:37,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:26:37,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:26:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:26:37,835 INFO L87 Difference]: Start difference. First operand 342 states and 823 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:38,474 INFO L93 Difference]: Finished difference Result 772 states and 1747 transitions. [2021-08-12 19:26:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:26:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:38,478 INFO L225 Difference]: With dead ends: 772 [2021-08-12 19:26:38,478 INFO L226 Difference]: Without dead ends: 740 [2021-08-12 19:26:38,478 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:26:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-08-12 19:26:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 404. [2021-08-12 19:26:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.424317617866005) internal successors, (977), 403 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 977 transitions. [2021-08-12 19:26:38,517 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 977 transitions. Word has length 24 [2021-08-12 19:26:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:38,517 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 977 transitions. [2021-08-12 19:26:38,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 977 transitions. [2021-08-12 19:26:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:38,519 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:38,519 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:38,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:26:38,721 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1645181860, now seen corresponding path program 17 times [2021-08-12 19:26:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336560263] [2021-08-12 19:26:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:38,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:38,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336560263] [2021-08-12 19:26:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336560263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:38,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977492790] [2021-08-12 19:26:38,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:38,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:26:38,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977492790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:26:38,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107938841] [2021-08-12 19:26:38,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:26:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:26:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:26:38,912 INFO L87 Difference]: Start difference. First operand 404 states and 977 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:39,504 INFO L93 Difference]: Finished difference Result 561 states and 1271 transitions. [2021-08-12 19:26:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:26:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:39,508 INFO L225 Difference]: With dead ends: 561 [2021-08-12 19:26:39,508 INFO L226 Difference]: Without dead ends: 544 [2021-08-12 19:26:39,510 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:26:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-12 19:26:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2021-08-12 19:26:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.4218362282878414) internal successors, (976), 403 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 976 transitions. [2021-08-12 19:26:39,549 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 976 transitions. Word has length 24 [2021-08-12 19:26:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:39,549 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 976 transitions. [2021-08-12 19:26:39,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 976 transitions. [2021-08-12 19:26:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:39,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:39,550 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:39,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:39,765 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1445869170, now seen corresponding path program 18 times [2021-08-12 19:26:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:39,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408968470] [2021-08-12 19:26:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:39,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408968470] [2021-08-12 19:26:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408968470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380432770] [2021-08-12 19:26:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:39,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:26:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:39,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380432770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:39,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:39,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:26:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300624407] [2021-08-12 19:26:39,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:26:39,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:26:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:26:39,968 INFO L87 Difference]: Start difference. First operand 404 states and 976 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:40,500 INFO L93 Difference]: Finished difference Result 675 states and 1527 transitions. [2021-08-12 19:26:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:26:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-08-12 19:26:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:40,503 INFO L225 Difference]: With dead ends: 675 [2021-08-12 19:26:40,503 INFO L226 Difference]: Without dead ends: 636 [2021-08-12 19:26:40,504 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:26:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-12 19:26:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 426. [2021-08-12 19:26:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.4376470588235293) internal successors, (1036), 425 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1036 transitions. [2021-08-12 19:26:40,549 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1036 transitions. Word has length 24 [2021-08-12 19:26:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:40,550 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1036 transitions. [2021-08-12 19:26:40,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1036 transitions. [2021-08-12 19:26:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:40,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:40,551 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:40,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 19:26:40,758 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1709303038, now seen corresponding path program 19 times [2021-08-12 19:26:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:40,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259200251] [2021-08-12 19:26:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:40,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259200251] [2021-08-12 19:26:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259200251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280159578] [2021-08-12 19:26:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280159578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:40,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:40,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:26:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287722410] [2021-08-12 19:26:40,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:26:40,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:26:40,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:26:40,999 INFO L87 Difference]: Start difference. First operand 426 states and 1036 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:41,628 INFO L93 Difference]: Finished difference Result 707 states and 1577 transitions. [2021-08-12 19:26:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:26:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:41,632 INFO L225 Difference]: With dead ends: 707 [2021-08-12 19:26:41,632 INFO L226 Difference]: Without dead ends: 676 [2021-08-12 19:26:41,633 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:26:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-12 19:26:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 412. [2021-08-12 19:26:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.4184914841849148) internal successors, (994), 411 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 994 transitions. [2021-08-12 19:26:41,671 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 994 transitions. Word has length 24 [2021-08-12 19:26:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:41,671 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 994 transitions. [2021-08-12 19:26:41,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 994 transitions. [2021-08-12 19:26:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:41,672 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:41,672 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:41,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:41,893 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 919841334, now seen corresponding path program 20 times [2021-08-12 19:26:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527186557] [2021-08-12 19:26:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:41,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527186557] [2021-08-12 19:26:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527186557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503676252] [2021-08-12 19:26:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:41,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:41,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503676252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:42,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:42,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:26:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200613220] [2021-08-12 19:26:42,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:26:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:26:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:26:42,102 INFO L87 Difference]: Start difference. First operand 412 states and 994 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:42,739 INFO L93 Difference]: Finished difference Result 808 states and 1819 transitions. [2021-08-12 19:26:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:26:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-08-12 19:26:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:42,743 INFO L225 Difference]: With dead ends: 808 [2021-08-12 19:26:42,743 INFO L226 Difference]: Without dead ends: 791 [2021-08-12 19:26:42,744 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:26:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-12 19:26:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 429. [2021-08-12 19:26:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.397196261682243) internal successors, (1026), 428 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) [2021-08-12 19:26:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1026 transitions. [2021-08-12 19:26:42,786 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1026 transitions. Word has length 24 [2021-08-12 19:26:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:42,786 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1026 transitions. [2021-08-12 19:26:42,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1026 transitions. [2021-08-12 19:26:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:42,787 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:42,787 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:43,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:26:43,011 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2005876850, now seen corresponding path program 21 times [2021-08-12 19:26:43,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:43,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796858683] [2021-08-12 19:26:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:43,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:43,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796858683] [2021-08-12 19:26:43,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796858683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:43,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46920107] [2021-08-12 19:26:43,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:43,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:26:43,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:43,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46920107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:43,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:43,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:26:43,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425295673] [2021-08-12 19:26:43,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:26:43,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:43,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:26:43,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:26:43,219 INFO L87 Difference]: Start difference. First operand 429 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:43,732 INFO L93 Difference]: Finished difference Result 603 states and 1325 transitions. [2021-08-12 19:26:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:26:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-08-12 19:26:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:43,735 INFO L225 Difference]: With dead ends: 603 [2021-08-12 19:26:43,735 INFO L226 Difference]: Without dead ends: 570 [2021-08-12 19:26:43,736 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:26:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-12 19:26:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 423. [2021-08-12 19:26:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.3981042654028437) internal successors, (1012), 422 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1012 transitions. [2021-08-12 19:26:43,777 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1012 transitions. Word has length 24 [2021-08-12 19:26:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:43,777 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1012 transitions. [2021-08-12 19:26:43,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1012 transitions. [2021-08-12 19:26:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:43,778 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:43,778 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:44,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 19:26:44,001 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash 198787894, now seen corresponding path program 22 times [2021-08-12 19:26:44,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:44,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280421794] [2021-08-12 19:26:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:44,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280421794] [2021-08-12 19:26:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280421794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545182468] [2021-08-12 19:26:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:44,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:44,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545182468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:44,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:44,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:26:44,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598341948] [2021-08-12 19:26:44,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:26:44,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:26:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:26:44,210 INFO L87 Difference]: Start difference. First operand 423 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 19:26:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:44,905 INFO L93 Difference]: Finished difference Result 911 states and 2081 transitions. [2021-08-12 19:26:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:26:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 24 [2021-08-12 19:26:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:44,910 INFO L225 Difference]: With dead ends: 911 [2021-08-12 19:26:44,910 INFO L226 Difference]: Without dead ends: 898 [2021-08-12 19:26:44,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:26:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-12 19:26:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 622. [2021-08-12 19:26:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4621578099838968) internal successors, (1529), 621 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1529 transitions. [2021-08-12 19:26:44,971 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1529 transitions. Word has length 24 [2021-08-12 19:26:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:44,971 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1529 transitions. [2021-08-12 19:26:44,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 19:26:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1529 transitions. [2021-08-12 19:26:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:44,973 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:44,973 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:45,189 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1747232740, now seen corresponding path program 23 times [2021-08-12 19:26:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783905162] [2021-08-12 19:26:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783905162] [2021-08-12 19:26:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783905162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888910901] [2021-08-12 19:26:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:45,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:26:45,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888910901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:45,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:45,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:26:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402180382] [2021-08-12 19:26:45,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:26:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:26:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:26:45,394 INFO L87 Difference]: Start difference. First operand 622 states and 1529 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:45,991 INFO L93 Difference]: Finished difference Result 884 states and 2006 transitions. [2021-08-12 19:26:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:26:45,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:45,995 INFO L225 Difference]: With dead ends: 884 [2021-08-12 19:26:45,995 INFO L226 Difference]: Without dead ends: 867 [2021-08-12 19:26:45,996 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:26:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-08-12 19:26:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 622. [2021-08-12 19:26:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4557165861513686) internal successors, (1525), 621 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1525 transitions. [2021-08-12 19:26:46,047 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1525 transitions. Word has length 24 [2021-08-12 19:26:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1525 transitions. [2021-08-12 19:26:46,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1525 transitions. [2021-08-12 19:26:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:46,049 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:46,049 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:46,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:26:46,271 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2041388290, now seen corresponding path program 24 times [2021-08-12 19:26:46,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:46,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758948253] [2021-08-12 19:26:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:46,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:46,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758948253] [2021-08-12 19:26:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758948253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458964285] [2021-08-12 19:26:46,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:46,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:26:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:46,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458964285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:46,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:46,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:26:46,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395455641] [2021-08-12 19:26:46,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:26:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:46,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:26:46,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:26:46,484 INFO L87 Difference]: Start difference. First operand 622 states and 1525 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:47,130 INFO L93 Difference]: Finished difference Result 961 states and 2180 transitions. [2021-08-12 19:26:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:26:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:47,133 INFO L225 Difference]: With dead ends: 961 [2021-08-12 19:26:47,133 INFO L226 Difference]: Without dead ends: 936 [2021-08-12 19:26:47,134 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:26:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-12 19:26:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 675. [2021-08-12 19:26:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.4614243323442135) internal successors, (1659), 674 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1659 transitions. [2021-08-12 19:26:47,187 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1659 transitions. Word has length 24 [2021-08-12 19:26:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:47,187 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 1659 transitions. [2021-08-12 19:26:47,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1659 transitions. [2021-08-12 19:26:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:26:47,188 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:47,189 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:47,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:47,398 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:47,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1814166910, now seen corresponding path program 25 times [2021-08-12 19:26:47,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:47,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378693032] [2021-08-12 19:26:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:47,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:47,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378693032] [2021-08-12 19:26:47,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378693032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:47,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677226287] [2021-08-12 19:26:47,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:26:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:47,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677226287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:47,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:47,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:26:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124141231] [2021-08-12 19:26:47,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:26:47,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:26:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:26:47,611 INFO L87 Difference]: Start difference. First operand 675 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:48,276 INFO L93 Difference]: Finished difference Result 961 states and 2204 transitions. [2021-08-12 19:26:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:26:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-08-12 19:26:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:48,280 INFO L225 Difference]: With dead ends: 961 [2021-08-12 19:26:48,280 INFO L226 Difference]: Without dead ends: 928 [2021-08-12 19:26:48,280 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:26:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-08-12 19:26:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 699. [2021-08-12 19:26:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.4713467048710602) internal successors, (1725), 698 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1725 transitions. [2021-08-12 19:26:48,352 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1725 transitions. Word has length 24 [2021-08-12 19:26:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:48,352 INFO L482 AbstractCegarLoop]: Abstraction has 699 states and 1725 transitions. [2021-08-12 19:26:48,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1725 transitions. [2021-08-12 19:26:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:26:48,354 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:48,354 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:48,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:26:48,569 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1660693108, now seen corresponding path program 26 times [2021-08-12 19:26:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385765819] [2021-08-12 19:26:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:48,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385765819] [2021-08-12 19:26:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385765819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806989933] [2021-08-12 19:26:48,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:48,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:26:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:48,667 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 19:26:48,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2021-08-12 19:26:48,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:48,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-08-12 19:26:48,872 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 19:26:48,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-08-12 19:26:48,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:48,899 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 19:26:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2021-08-12 19:26:48,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:48,927 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 19:26:48,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-08-12 19:26:48,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,938 INFO L628 ElimStorePlain]: treesize reduction 16, result has 15.8 percent of original size [2021-08-12 19:26:48,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:48,938 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:103, output treesize:3 [2021-08-12 19:26:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806989933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:48,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:48,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-12 19:26:48,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359730153] [2021-08-12 19:26:48,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:26:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:26:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:48,946 INFO L87 Difference]: Start difference. First operand 699 states and 1725 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:49,243 INFO L93 Difference]: Finished difference Result 1116 states and 2616 transitions. [2021-08-12 19:26:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:26:49,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 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 26 [2021-08-12 19:26:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:49,251 INFO L225 Difference]: With dead ends: 1116 [2021-08-12 19:26:49,251 INFO L226 Difference]: Without dead ends: 1107 [2021-08-12 19:26:49,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-08-12 19:26:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 866. [2021-08-12 19:26:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.4959537572254336) internal successors, (2159), 865 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2159 transitions. [2021-08-12 19:26:49,319 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2159 transitions. Word has length 26 [2021-08-12 19:26:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:49,319 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2159 transitions. [2021-08-12 19:26:49,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2159 transitions. [2021-08-12 19:26:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:26:49,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:49,321 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:49,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:26:49,543 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -439799948, now seen corresponding path program 27 times [2021-08-12 19:26:49,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:49,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197306926] [2021-08-12 19:26:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:49,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197306926] [2021-08-12 19:26:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197306926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:49,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147724936] [2021-08-12 19:26:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:49,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:26:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:26:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:49,678 INFO L354 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2021-08-12 19:26:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2021-08-12 19:26:49,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:49,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:38 [2021-08-12 19:26:49,744 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:26:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2021-08-12 19:26:49,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:26:49,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 14 [2021-08-12 19:26:49,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,761 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:26:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 17 [2021-08-12 19:26:49,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,766 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:26:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 18 [2021-08-12 19:26:49,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:49,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:49,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:103, output treesize:3 [2021-08-12 19:26:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:49,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147724936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:49,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:49,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-12 19:26:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417992641] [2021-08-12 19:26:49,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:26:49,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:26:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:49,791 INFO L87 Difference]: Start difference. First operand 866 states and 2159 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:50,148 INFO L93 Difference]: Finished difference Result 1176 states and 2829 transitions. [2021-08-12 19:26:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:26:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-08-12 19:26:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:50,154 INFO L225 Difference]: With dead ends: 1176 [2021-08-12 19:26:50,154 INFO L226 Difference]: Without dead ends: 1158 [2021-08-12 19:26:50,156 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-08-12 19:26:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 972. [2021-08-12 19:26:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 2.532440782698249) internal successors, (2459), 971 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2459 transitions. [2021-08-12 19:26:50,242 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2459 transitions. Word has length 26 [2021-08-12 19:26:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:50,242 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 2459 transitions. [2021-08-12 19:26:50,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2459 transitions. [2021-08-12 19:26:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:26:50,244 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:50,244 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:50,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 19:26:50,457 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash -318369164, now seen corresponding path program 28 times [2021-08-12 19:26:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:50,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727405106] [2021-08-12 19:26:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:50,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727405106] [2021-08-12 19:26:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727405106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096643126] [2021-08-12 19:26:50,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:50,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:26:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:50,588 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-08-12 19:26:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-08-12 19:26:50,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:50,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:50,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:50,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:32 [2021-08-12 19:26:50,683 INFO L446 ElimStorePlain]: Different costs {1=[f], 3=[v_prenex_13]} [2021-08-12 19:26:50,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:26:50,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-08-12 19:26:50,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:50,694 INFO L628 ElimStorePlain]: treesize reduction 30, result has 9.1 percent of original size [2021-08-12 19:26:50,694 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-08-12 19:26:50,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:50,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:3 [2021-08-12 19:26:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:26:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096643126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:50,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:50,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-12 19:26:50,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852281021] [2021-08-12 19:26:50,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:26:50,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:50,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:26:50,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:50,707 INFO L87 Difference]: Start difference. First operand 972 states and 2459 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:51,084 INFO L93 Difference]: Finished difference Result 1362 states and 3308 transitions. [2021-08-12 19:26:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:26:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-08-12 19:26:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:51,089 INFO L225 Difference]: With dead ends: 1362 [2021-08-12 19:26:51,089 INFO L226 Difference]: Without dead ends: 1335 [2021-08-12 19:26:51,090 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-08-12 19:26:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1089. [2021-08-12 19:26:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 2.557904411764706) internal successors, (2783), 1088 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 2783 transitions. [2021-08-12 19:26:51,170 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 2783 transitions. Word has length 26 [2021-08-12 19:26:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:51,170 INFO L482 AbstractCegarLoop]: Abstraction has 1089 states and 2783 transitions. [2021-08-12 19:26:51,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 2783 transitions. [2021-08-12 19:26:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:26:51,172 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:51,172 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:51,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:51,393 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash 412497268, now seen corresponding path program 29 times [2021-08-12 19:26:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:51,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397421707] [2021-08-12 19:26:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:51,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397421707] [2021-08-12 19:26:51,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397421707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408545123] [2021-08-12 19:26:51,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:51,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:26:51,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:26:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:51,519 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 19:26:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2021-08-12 19:26:51,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:51,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-08-12 19:26:51,730 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 19:26:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-08-12 19:26:51,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:51,758 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 19:26:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2021-08-12 19:26:51,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:51,790 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 19:26:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-08-12 19:26:51,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,797 INFO L628 ElimStorePlain]: treesize reduction 16, result has 15.8 percent of original size [2021-08-12 19:26:51,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:51,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:103, output treesize:3 [2021-08-12 19:26:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:26:51,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408545123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:51,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:51,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-12 19:26:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985819937] [2021-08-12 19:26:51,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:26:51,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:51,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:26:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:51,821 INFO L87 Difference]: Start difference. First operand 1089 states and 2783 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:52,317 INFO L93 Difference]: Finished difference Result 1529 states and 3737 transitions. [2021-08-12 19:26:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:26:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 26 [2021-08-12 19:26:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:52,323 INFO L225 Difference]: With dead ends: 1529 [2021-08-12 19:26:52,323 INFO L226 Difference]: Without dead ends: 1520 [2021-08-12 19:26:52,323 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:26:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-12 19:26:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1225. [2021-08-12 19:26:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.5784313725490198) internal successors, (3156), 1224 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3156 transitions. [2021-08-12 19:26:52,434 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3156 transitions. Word has length 26 [2021-08-12 19:26:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:52,434 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 3156 transitions. [2021-08-12 19:26:52,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3156 transitions. [2021-08-12 19:26:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:26:52,436 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:52,436 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:52,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:26:52,643 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1387752458, now seen corresponding path program 30 times [2021-08-12 19:26:52,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:52,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254889233] [2021-08-12 19:26:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254889233] [2021-08-12 19:26:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254889233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464778071] [2021-08-12 19:26:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:52,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:26:52,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:26:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464778071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:52,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:52,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 19:26:52,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121092847] [2021-08-12 19:26:52,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:26:52,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:26:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:26:52,955 INFO L87 Difference]: Start difference. First operand 1225 states and 3156 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-08-12 19:26:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:54,147 INFO L93 Difference]: Finished difference Result 1780 states and 4336 transitions. [2021-08-12 19:26:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:26:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-08-12 19:26:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:54,154 INFO L225 Difference]: With dead ends: 1780 [2021-08-12 19:26:54,154 INFO L226 Difference]: Without dead ends: 1761 [2021-08-12 19:26:54,155 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:26:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-08-12 19:26:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1090. [2021-08-12 19:26:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 2.5629017447199267) internal successors, (2791), 1089 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 2791 transitions. [2021-08-12 19:26:54,251 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 2791 transitions. Word has length 28 [2021-08-12 19:26:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:54,251 INFO L482 AbstractCegarLoop]: Abstraction has 1090 states and 2791 transitions. [2021-08-12 19:26:54,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-08-12 19:26:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 2791 transitions. [2021-08-12 19:26:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:26:54,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:54,253 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:54,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:54,475 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1570155570, now seen corresponding path program 31 times [2021-08-12 19:26:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:54,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867879910] [2021-08-12 19:26:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:54,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867879910] [2021-08-12 19:26:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867879910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179176242] [2021-08-12 19:26:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:26:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:54,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179176242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:54,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:54,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:26:54,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389683399] [2021-08-12 19:26:54,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:26:54,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:26:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:26:54,741 INFO L87 Difference]: Start difference. First operand 1090 states and 2791 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:56,372 INFO L93 Difference]: Finished difference Result 2093 states and 4838 transitions. [2021-08-12 19:26:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:26:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 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 28 [2021-08-12 19:26:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:56,378 INFO L225 Difference]: With dead ends: 2093 [2021-08-12 19:26:56,378 INFO L226 Difference]: Without dead ends: 2007 [2021-08-12 19:26:56,380 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-08-12 19:26:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-08-12 19:26:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1154. [2021-08-12 19:26:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.5481352992194277) internal successors, (2938), 1153 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2938 transitions. [2021-08-12 19:26:56,509 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2938 transitions. Word has length 28 [2021-08-12 19:26:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:56,509 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 2938 transitions. [2021-08-12 19:26:56,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2938 transitions. [2021-08-12 19:26:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:26:56,511 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:56,512 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:56,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:56,725 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1031109750, now seen corresponding path program 32 times [2021-08-12 19:26:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:56,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916339760] [2021-08-12 19:26:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916339760] [2021-08-12 19:26:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916339760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374667732] [2021-08-12 19:26:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:56,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:26:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374667732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:56,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:26:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753578775] [2021-08-12 19:26:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:26:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:26:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:26:56,980 INFO L87 Difference]: Start difference. First operand 1154 states and 2938 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:26:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:58,510 INFO L93 Difference]: Finished difference Result 2338 states and 5762 transitions. [2021-08-12 19:26:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:26:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-08-12 19:26:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:58,517 INFO L225 Difference]: With dead ends: 2338 [2021-08-12 19:26:58,517 INFO L226 Difference]: Without dead ends: 2294 [2021-08-12 19:26:58,518 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:26:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-08-12 19:26:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1436. [2021-08-12 19:26:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 2.5491289198606273) internal successors, (3658), 1435 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 3658 transitions. [2021-08-12 19:26:58,640 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 3658 transitions. Word has length 28 [2021-08-12 19:26:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:58,640 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 3658 transitions. [2021-08-12 19:26:58,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:26:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 3658 transitions. [2021-08-12 19:26:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:26:58,642 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:58,642 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:58,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-12 19:26:58,857 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1879959464, now seen corresponding path program 33 times [2021-08-12 19:26:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:58,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490741638] [2021-08-12 19:26:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:58,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:58,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490741638] [2021-08-12 19:26:58,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490741638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:58,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157190700] [2021-08-12 19:26:58,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:58,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:26:58,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:26:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157190700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:59,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:59,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:26:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362349929] [2021-08-12 19:26:59,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:26:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:26:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:26:59,120 INFO L87 Difference]: Start difference. First operand 1436 states and 3658 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:27:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:00,195 INFO L93 Difference]: Finished difference Result 1674 states and 4105 transitions. [2021-08-12 19:27:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:27:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-08-12 19:27:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:00,199 INFO L225 Difference]: With dead ends: 1674 [2021-08-12 19:27:00,199 INFO L226 Difference]: Without dead ends: 1657 [2021-08-12 19:27:00,200 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:27:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-08-12 19:27:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1436. [2021-08-12 19:27:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 2.5477351916376305) internal successors, (3656), 1435 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 3656 transitions. [2021-08-12 19:27:00,315 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 3656 transitions. Word has length 28 [2021-08-12 19:27:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:00,315 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 3656 transitions. [2021-08-12 19:27:00,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:27:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 3656 transitions. [2021-08-12 19:27:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:00,317 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:00,317 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:00,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:00,533 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1630957874, now seen corresponding path program 34 times [2021-08-12 19:27:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738082554] [2021-08-12 19:27:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:00,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738082554] [2021-08-12 19:27:00,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738082554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506529310] [2021-08-12 19:27:00,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:00,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:00,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506529310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:00,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:00,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:27:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734705364] [2021-08-12 19:27:00,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:27:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:27:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:27:00,759 INFO L87 Difference]: Start difference. First operand 1436 states and 3656 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:01,871 INFO L93 Difference]: Finished difference Result 2074 states and 5074 transitions. [2021-08-12 19:27:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:27:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 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 28 [2021-08-12 19:27:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:01,877 INFO L225 Difference]: With dead ends: 2074 [2021-08-12 19:27:01,878 INFO L226 Difference]: Without dead ends: 2026 [2021-08-12 19:27:01,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:27:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-08-12 19:27:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1482. [2021-08-12 19:27:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 2.553004726536124) internal successors, (3781), 1481 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 3781 transitions. [2021-08-12 19:27:01,996 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 3781 transitions. Word has length 28 [2021-08-12 19:27:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:01,996 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 3781 transitions. [2021-08-12 19:27:01,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 3781 transitions. [2021-08-12 19:27:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:01,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:01,998 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:02,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 19:27:02,198 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:02,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:02,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1524214334, now seen corresponding path program 35 times [2021-08-12 19:27:02,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:02,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909292048] [2021-08-12 19:27:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:02,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909292048] [2021-08-12 19:27:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909292048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:02,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142425656] [2021-08-12 19:27:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:02,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:27:02,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:02,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142425656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:02,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:02,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-08-12 19:27:02,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067630224] [2021-08-12 19:27:02,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:27:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:27:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:27:02,442 INFO L87 Difference]: Start difference. First operand 1482 states and 3781 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-08-12 19:27:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:03,716 INFO L93 Difference]: Finished difference Result 1972 states and 4762 transitions. [2021-08-12 19:27:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:27:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 28 [2021-08-12 19:27:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:03,720 INFO L225 Difference]: With dead ends: 1972 [2021-08-12 19:27:03,720 INFO L226 Difference]: Without dead ends: 1941 [2021-08-12 19:27:03,721 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 612.1ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 19:27:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-08-12 19:27:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1492. [2021-08-12 19:27:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 2.551307847082495) internal successors, (3804), 1491 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 3804 transitions. [2021-08-12 19:27:03,829 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 3804 transitions. Word has length 28 [2021-08-12 19:27:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:03,829 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 3804 transitions. [2021-08-12 19:27:03,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-08-12 19:27:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 3804 transitions. [2021-08-12 19:27:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:03,831 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:03,832 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:04,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:04,045 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1020569282, now seen corresponding path program 36 times [2021-08-12 19:27:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:04,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869832781] [2021-08-12 19:27:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:04,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869832781] [2021-08-12 19:27:04,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869832781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708555744] [2021-08-12 19:27:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:04,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:27:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708555744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:04,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:04,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:27:04,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827331501] [2021-08-12 19:27:04,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:27:04,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:27:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:27:04,314 INFO L87 Difference]: Start difference. First operand 1492 states and 3804 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-08-12 19:27:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:05,747 INFO L93 Difference]: Finished difference Result 2137 states and 5102 transitions. [2021-08-12 19:27:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:27:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 28 [2021-08-12 19:27:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:05,752 INFO L225 Difference]: With dead ends: 2137 [2021-08-12 19:27:05,752 INFO L226 Difference]: Without dead ends: 2094 [2021-08-12 19:27:05,753 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:27:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-08-12 19:27:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1363. [2021-08-12 19:27:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.530102790014684) internal successors, (3446), 1362 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3446 transitions. [2021-08-12 19:27:05,908 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3446 transitions. Word has length 28 [2021-08-12 19:27:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:05,909 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3446 transitions. [2021-08-12 19:27:05,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-08-12 19:27:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3446 transitions. [2021-08-12 19:27:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:05,911 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:05,911 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:06,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 19:27:06,133 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash 873893366, now seen corresponding path program 37 times [2021-08-12 19:27:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130775553] [2021-08-12 19:27:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:06,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:06,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130775553] [2021-08-12 19:27:06,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130775553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:06,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948157508] [2021-08-12 19:27:06,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:06,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948157508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:06,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:06,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:27:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342151080] [2021-08-12 19:27:06,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:27:06,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:27:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:27:06,447 INFO L87 Difference]: Start difference. First operand 1363 states and 3446 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:07,881 INFO L93 Difference]: Finished difference Result 2095 states and 4987 transitions. [2021-08-12 19:27:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:27:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 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 28 [2021-08-12 19:27:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:07,886 INFO L225 Difference]: With dead ends: 2095 [2021-08-12 19:27:07,886 INFO L226 Difference]: Without dead ends: 2078 [2021-08-12 19:27:07,887 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:27:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-08-12 19:27:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1171. [2021-08-12 19:27:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.500854700854701) internal successors, (2926), 1170 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2926 transitions. [2021-08-12 19:27:08,062 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2926 transitions. Word has length 28 [2021-08-12 19:27:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:08,063 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2926 transitions. [2021-08-12 19:27:08,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2926 transitions. [2021-08-12 19:27:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:08,064 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:08,064 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:27:08,277 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 876971314, now seen corresponding path program 38 times [2021-08-12 19:27:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702335592] [2021-08-12 19:27:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:08,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702335592] [2021-08-12 19:27:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702335592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894078329] [2021-08-12 19:27:08,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:08,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:08,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894078329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:08,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:08,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:27:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512707008] [2021-08-12 19:27:08,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:27:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:27:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:27:08,525 INFO L87 Difference]: Start difference. First operand 1171 states and 2926 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:09,783 INFO L93 Difference]: Finished difference Result 1590 states and 3694 transitions. [2021-08-12 19:27:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 19:27:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 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 28 [2021-08-12 19:27:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:09,787 INFO L225 Difference]: With dead ends: 1590 [2021-08-12 19:27:09,787 INFO L226 Difference]: Without dead ends: 1536 [2021-08-12 19:27:09,788 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:27:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-08-12 19:27:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1078. [2021-08-12 19:27:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.4753946146703805) internal successors, (2666), 1077 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2666 transitions. [2021-08-12 19:27:09,929 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2666 transitions. Word has length 28 [2021-08-12 19:27:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:09,929 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2666 transitions. [2021-08-12 19:27:09,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2666 transitions. [2021-08-12 19:27:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:09,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:09,931 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:10,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:10,145 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash 706414582, now seen corresponding path program 39 times [2021-08-12 19:27:10,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:10,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572305309] [2021-08-12 19:27:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:10,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:10,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572305309] [2021-08-12 19:27:10,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572305309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:10,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564089843] [2021-08-12 19:27:10,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:10,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:27:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:10,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:10,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564089843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:10,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:10,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:27:10,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701041323] [2021-08-12 19:27:10,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:27:10,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:27:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:27:10,384 INFO L87 Difference]: Start difference. First operand 1078 states and 2666 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:11,907 INFO L93 Difference]: Finished difference Result 2000 states and 4694 transitions. [2021-08-12 19:27:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 19:27:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 28 [2021-08-12 19:27:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:11,910 INFO L225 Difference]: With dead ends: 2000 [2021-08-12 19:27:11,910 INFO L226 Difference]: Without dead ends: 1983 [2021-08-12 19:27:11,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:27:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-12 19:27:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1181. [2021-08-12 19:27:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.440677966101695) internal successors, (2880), 1180 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2880 transitions. [2021-08-12 19:27:12,020 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2880 transitions. Word has length 28 [2021-08-12 19:27:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:12,021 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 2880 transitions. [2021-08-12 19:27:12,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2880 transitions. [2021-08-12 19:27:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:12,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:12,022 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:12,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:12,222 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1792450098, now seen corresponding path program 40 times [2021-08-12 19:27:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:12,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790928850] [2021-08-12 19:27:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790928850] [2021-08-12 19:27:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790928850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591812954] [2021-08-12 19:27:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:12,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:12,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591812954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:12,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:12,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-08-12 19:27:12,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636105681] [2021-08-12 19:27:12,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:27:12,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:12,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:27:12,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:27:12,486 INFO L87 Difference]: Start difference. First operand 1181 states and 2880 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:13,575 INFO L93 Difference]: Finished difference Result 1530 states and 3546 transitions. [2021-08-12 19:27:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:27:13,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 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 28 [2021-08-12 19:27:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:13,578 INFO L225 Difference]: With dead ends: 1530 [2021-08-12 19:27:13,578 INFO L226 Difference]: Without dead ends: 1497 [2021-08-12 19:27:13,579 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:27:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-08-12 19:27:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1209. [2021-08-12 19:27:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.447019867549669) internal successors, (2956), 1208 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2956 transitions. [2021-08-12 19:27:13,716 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2956 transitions. Word has length 28 [2021-08-12 19:27:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:13,716 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 2956 transitions. [2021-08-12 19:27:13,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2956 transitions. [2021-08-12 19:27:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:13,718 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:13,718 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:13,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:13,933 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash -352976394, now seen corresponding path program 41 times [2021-08-12 19:27:13,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:13,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793806587] [2021-08-12 19:27:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:14,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793806587] [2021-08-12 19:27:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793806587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565097935] [2021-08-12 19:27:14,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:14,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:27:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:14,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565097935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:14,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:14,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-08-12 19:27:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487436187] [2021-08-12 19:27:14,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:27:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:27:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:27:14,199 INFO L87 Difference]: Start difference. First operand 1209 states and 2956 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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) [2021-08-12 19:27:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:15,820 INFO L93 Difference]: Finished difference Result 2404 states and 5732 transitions. [2021-08-12 19:27:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:27:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 28 [2021-08-12 19:27:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:15,824 INFO L225 Difference]: With dead ends: 2404 [2021-08-12 19:27:15,825 INFO L226 Difference]: Without dead ends: 2391 [2021-08-12 19:27:15,825 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 19:27:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-12 19:27:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1853. [2021-08-12 19:27:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.5) internal successors, (4630), 1852 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 4630 transitions. [2021-08-12 19:27:15,994 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 4630 transitions. Word has length 28 [2021-08-12 19:27:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:15,994 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 4630 transitions. [2021-08-12 19:27:15,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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) [2021-08-12 19:27:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 4630 transitions. [2021-08-12 19:27:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:15,996 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:15,996 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:16,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:16,197 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1995970268, now seen corresponding path program 42 times [2021-08-12 19:27:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868592739] [2021-08-12 19:27:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:16,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:16,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868592739] [2021-08-12 19:27:16,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868592739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:16,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433546321] [2021-08-12 19:27:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:16,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:27:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:16,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433546321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:16,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:16,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:27:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369981019] [2021-08-12 19:27:16,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:27:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:27:16,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:27:16,406 INFO L87 Difference]: Start difference. First operand 1853 states and 4630 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:27:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:17,725 INFO L93 Difference]: Finished difference Result 2336 states and 5551 transitions. [2021-08-12 19:27:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:27:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-08-12 19:27:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:17,729 INFO L225 Difference]: With dead ends: 2336 [2021-08-12 19:27:17,729 INFO L226 Difference]: Without dead ends: 2319 [2021-08-12 19:27:17,729 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:27:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-12 19:27:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1827. [2021-08-12 19:27:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 2.4961664841182913) internal successors, (4558), 1826 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 4558 transitions. [2021-08-12 19:27:17,888 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 4558 transitions. Word has length 28 [2021-08-12 19:27:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:17,888 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 4558 transitions. [2021-08-12 19:27:17,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-12 19:27:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 4558 transitions. [2021-08-12 19:27:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:17,891 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:17,891 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:18,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:18,092 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1489624002, now seen corresponding path program 43 times [2021-08-12 19:27:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:18,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115127986] [2021-08-12 19:27:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:18,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115127986] [2021-08-12 19:27:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115127986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987817853] [2021-08-12 19:27:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:18,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987817853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:18,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:18,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-08-12 19:27:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76821871] [2021-08-12 19:27:18,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:27:18,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:27:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:27:18,315 INFO L87 Difference]: Start difference. First operand 1827 states and 4558 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-08-12 19:27:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:19,676 INFO L93 Difference]: Finished difference Result 2485 states and 5919 transitions. [2021-08-12 19:27:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:27:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 28 [2021-08-12 19:27:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:19,680 INFO L225 Difference]: With dead ends: 2485 [2021-08-12 19:27:19,680 INFO L226 Difference]: Without dead ends: 2460 [2021-08-12 19:27:19,681 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:27:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-12 19:27:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1976. [2021-08-12 19:27:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.5063291139240507) internal successors, (4950), 1975 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4950 transitions. [2021-08-12 19:27:19,844 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4950 transitions. Word has length 28 [2021-08-12 19:27:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:19,844 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4950 transitions. [2021-08-12 19:27:19,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-08-12 19:27:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4950 transitions. [2021-08-12 19:27:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:19,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:19,846 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:20,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:20,047 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1262402622, now seen corresponding path program 44 times [2021-08-12 19:27:20,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:20,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132020926] [2021-08-12 19:27:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:20,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132020926] [2021-08-12 19:27:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132020926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142330409] [2021-08-12 19:27:20,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:20,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:20,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142330409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:20,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:20,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:27:20,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091695293] [2021-08-12 19:27:20,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:27:20,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:27:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:27:20,292 INFO L87 Difference]: Start difference. First operand 1976 states and 4950 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-08-12 19:27:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:21,836 INFO L93 Difference]: Finished difference Result 2783 states and 6613 transitions. [2021-08-12 19:27:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:27:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 28 [2021-08-12 19:27:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:21,841 INFO L225 Difference]: With dead ends: 2783 [2021-08-12 19:27:21,841 INFO L226 Difference]: Without dead ends: 2750 [2021-08-12 19:27:21,842 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:27:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-08-12 19:27:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2206. [2021-08-12 19:27:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.510204081632653) internal successors, (5535), 2205 states have internal predecessors, (5535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 5535 transitions. [2021-08-12 19:27:22,015 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 5535 transitions. Word has length 28 [2021-08-12 19:27:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:22,015 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 5535 transitions. [2021-08-12 19:27:22,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-08-12 19:27:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 5535 transitions. [2021-08-12 19:27:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:27:22,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:22,017 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:22,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-12 19:27:22,217 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1945988538, now seen corresponding path program 45 times [2021-08-12 19:27:22,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:22,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832085907] [2021-08-12 19:27:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:22,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:22,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832085907] [2021-08-12 19:27:22,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832085907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:22,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98674659] [2021-08-12 19:27:22,286 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:22,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:27:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:27:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:22,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98674659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:22,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:22,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:27:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424360010] [2021-08-12 19:27:22,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:27:22,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:27:22,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:27:22,453 INFO L87 Difference]: Start difference. First operand 2206 states and 5535 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-08-12 19:27:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:24,117 INFO L93 Difference]: Finished difference Result 2782 states and 6683 transitions. [2021-08-12 19:27:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 19:27:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 28 [2021-08-12 19:27:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:24,121 INFO L225 Difference]: With dead ends: 2782 [2021-08-12 19:27:24,122 INFO L226 Difference]: Without dead ends: 2741 [2021-08-12 19:27:24,122 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 673.3ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:27:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-08-12 19:27:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2259. [2021-08-12 19:27:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.5230292294065544) internal successors, (5697), 2258 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5697 transitions. [2021-08-12 19:27:24,294 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5697 transitions. Word has length 28 [2021-08-12 19:27:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:24,294 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5697 transitions. [2021-08-12 19:27:24,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-08-12 19:27:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5697 transitions. [2021-08-12 19:27:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:27:24,296 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:24,296 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-12 19:27:24,497 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1181662516, now seen corresponding path program 46 times [2021-08-12 19:27:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278392013] [2021-08-12 19:27:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:24,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278392013] [2021-08-12 19:27:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278392013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627697803] [2021-08-12 19:27:24,534 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 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 [2021-08-12 19:27:24,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:27:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:24,643 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 19:27:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2021-08-12 19:27:24,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:24,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:24,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:24,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:92 [2021-08-12 19:27:25,082 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-12 19:27:25,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 31 [2021-08-12 19:27:25,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:25,137 INFO L628 ElimStorePlain]: treesize reduction 53, result has 71.5 percent of original size [2021-08-12 19:27:25,168 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-12 19:27:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-08-12 19:27:25,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:25,178 INFO L628 ElimStorePlain]: treesize reduction 86, result has 3.4 percent of original size [2021-08-12 19:27:25,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-08-12 19:27:25,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-08-12 19:27:25,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:25,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:242, output treesize:3 [2021-08-12 19:27:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627697803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:25,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:25,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-12 19:27:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559423317] [2021-08-12 19:27:25,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:27:25,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:27:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:25,187 INFO L87 Difference]: Start difference. First operand 2259 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:26,288 INFO L93 Difference]: Finished difference Result 3000 states and 7344 transitions. [2021-08-12 19:27:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:27:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-08-12 19:27:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:26,294 INFO L225 Difference]: With dead ends: 3000 [2021-08-12 19:27:26,294 INFO L226 Difference]: Without dead ends: 2991 [2021-08-12 19:27:26,294 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-08-12 19:27:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2615. [2021-08-12 19:27:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5355776587605203) internal successors, (6628), 2614 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6628 transitions. [2021-08-12 19:27:26,527 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6628 transitions. Word has length 30 [2021-08-12 19:27:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:26,528 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 6628 transitions. [2021-08-12 19:27:26,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6628 transitions. [2021-08-12 19:27:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:27:26,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:26,530 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:26,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-12 19:27:26,731 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash 61643060, now seen corresponding path program 47 times [2021-08-12 19:27:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:26,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832342892] [2021-08-12 19:27:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:27:26,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:26,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832342892] [2021-08-12 19:27:26,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832342892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:26,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369092136] [2021-08-12 19:27:26,764 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 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 [2021-08-12 19:27:26,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:27:26,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:27:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:26,985 INFO L354 Elim1Store]: treesize reduction 116, result has 35.9 percent of original size [2021-08-12 19:27:26,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 97 [2021-08-12 19:27:26,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:27,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:88 [2021-08-12 19:27:27,105 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2021-08-12 19:27:27,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,120 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 19:27:27,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-08-12 19:27:27,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,131 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2021-08-12 19:27:27,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,141 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 17 [2021-08-12 19:27:27,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,155 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-12 19:27:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 29 [2021-08-12 19:27:27,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,166 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-08-12 19:27:27,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,174 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 24 [2021-08-12 19:27:27,175 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,179 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:27:27,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2021-08-12 19:27:27,180 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,186 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-12 19:27:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 21 [2021-08-12 19:27:27,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,190 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-12 19:27:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 28 [2021-08-12 19:27:27,191 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:27,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:27,192 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:431, output treesize:3 [2021-08-12 19:27:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:27,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369092136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:27,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:27,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-12 19:27:27,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203984358] [2021-08-12 19:27:27,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:27:27,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:27,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:27:27,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:27,201 INFO L87 Difference]: Start difference. First operand 2615 states and 6628 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:28,174 INFO L93 Difference]: Finished difference Result 3127 states and 7773 transitions. [2021-08-12 19:27:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:27:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-08-12 19:27:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:28,179 INFO L225 Difference]: With dead ends: 3127 [2021-08-12 19:27:28,179 INFO L226 Difference]: Without dead ends: 3109 [2021-08-12 19:27:28,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-08-12 19:27:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2021-08-12 19:27:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.5547703180212014) internal successors, (7230), 2830 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7230 transitions. [2021-08-12 19:27:28,440 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7230 transitions. Word has length 30 [2021-08-12 19:27:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:28,440 INFO L482 AbstractCegarLoop]: Abstraction has 2831 states and 7230 transitions. [2021-08-12 19:27:28,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7230 transitions. [2021-08-12 19:27:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:27:28,444 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:28,444 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:28,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:28,656 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1458216244, now seen corresponding path program 48 times [2021-08-12 19:27:28,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:28,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352263835] [2021-08-12 19:27:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:27:28,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352263835] [2021-08-12 19:27:28,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352263835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479705856] [2021-08-12 19:27:28,687 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 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 [2021-08-12 19:27:28,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:27:28,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:27:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:28,835 INFO L446 ElimStorePlain]: Different costs {10=[f], 15=[f_inv]} [2021-08-12 19:27:28,866 INFO L354 Elim1Store]: treesize reduction 45, result has 44.4 percent of original size [2021-08-12 19:27:28,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 123 treesize of output 96 [2021-08-12 19:27:28,934 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:27:28,968 INFO L628 ElimStorePlain]: treesize reduction 11, result has 91.0 percent of original size [2021-08-12 19:27:28,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:28,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 96 [2021-08-12 19:27:29,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:29,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:29,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:29,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:123, output treesize:3 [2021-08-12 19:27:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:29,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479705856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:29,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:29,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-12 19:27:29,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864358222] [2021-08-12 19:27:29,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:27:29,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:29,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:27:29,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:29,042 INFO L87 Difference]: Start difference. First operand 2831 states and 7230 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:30,208 INFO L93 Difference]: Finished difference Result 3301 states and 8295 transitions. [2021-08-12 19:27:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:27:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-08-12 19:27:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:30,219 INFO L225 Difference]: With dead ends: 3301 [2021-08-12 19:27:30,219 INFO L226 Difference]: Without dead ends: 3281 [2021-08-12 19:27:30,219 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2021-08-12 19:27:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3017. [2021-08-12 19:27:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.570954907161804) internal successors, (7754), 3016 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 7754 transitions. [2021-08-12 19:27:30,500 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 7754 transitions. Word has length 30 [2021-08-12 19:27:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:30,500 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 7754 transitions. [2021-08-12 19:27:30,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 7754 transitions. [2021-08-12 19:27:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:27:30,505 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:30,505 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 19:27:30,713 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -759717580, now seen corresponding path program 49 times [2021-08-12 19:27:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:30,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564212019] [2021-08-12 19:27:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:27:30,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:30,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564212019] [2021-08-12 19:27:30,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564212019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:30,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790778686] [2021-08-12 19:27:30,742 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 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 [2021-08-12 19:27:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:27:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:30,858 INFO L354 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2021-08-12 19:27:30,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 69 [2021-08-12 19:27:30,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:30,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:30,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:30,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:66 [2021-08-12 19:27:31,149 INFO L446 ElimStorePlain]: Different costs {3=[f], 6=[v_prenex_32, v_prenex_31]} [2021-08-12 19:27:31,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:31,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:27:31,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:31,173 INFO L628 ElimStorePlain]: treesize reduction 89, result has 3.3 percent of original size [2021-08-12 19:27:31,173 INFO L518 ElimStorePlain]: Eliminatee v_prenex_32 vanished before elimination [2021-08-12 19:27:31,173 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-08-12 19:27:31,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:31,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:3 [2021-08-12 19:27:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:31,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790778686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:31,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:31,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-12 19:27:31,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136788879] [2021-08-12 19:27:31,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:27:31,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:27:31,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:31,186 INFO L87 Difference]: Start difference. First operand 3017 states and 7754 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:32,485 INFO L93 Difference]: Finished difference Result 3713 states and 9325 transitions. [2021-08-12 19:27:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:27:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-08-12 19:27:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:32,491 INFO L225 Difference]: With dead ends: 3713 [2021-08-12 19:27:32,491 INFO L226 Difference]: Without dead ends: 3682 [2021-08-12 19:27:32,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-08-12 19:27:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3254. [2021-08-12 19:27:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 2.5853058715032278) internal successors, (8410), 3253 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 8410 transitions. [2021-08-12 19:27:32,789 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 8410 transitions. Word has length 30 [2021-08-12 19:27:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:32,789 INFO L482 AbstractCegarLoop]: Abstraction has 3254 states and 8410 transitions. [2021-08-12 19:27:32,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 8410 transitions. [2021-08-12 19:27:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:27:32,791 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:32,791 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:32,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-12 19:27:32,992 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1890343628, now seen corresponding path program 50 times [2021-08-12 19:27:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:32,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758186084] [2021-08-12 19:27:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:27:33,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:33,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758186084] [2021-08-12 19:27:33,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758186084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:33,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568720698] [2021-08-12 19:27:33,028 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 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 [2021-08-12 19:27:33,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:33,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:27:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:33,180 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 19:27:33,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2021-08-12 19:27:33,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:33,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:92 [2021-08-12 19:27:33,624 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-12 19:27:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 31 [2021-08-12 19:27:33,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,671 INFO L628 ElimStorePlain]: treesize reduction 51, result has 72.6 percent of original size [2021-08-12 19:27:33,686 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-12 19:27:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 29 [2021-08-12 19:27:33,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:33,731 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-12 19:27:33,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-08-12 19:27:33,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,741 INFO L628 ElimStorePlain]: treesize reduction 59, result has 4.8 percent of original size [2021-08-12 19:27:33,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-08-12 19:27:33,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:33,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:242, output treesize:3 [2021-08-12 19:27:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:27:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568720698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:33,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:33,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-12 19:27:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467948846] [2021-08-12 19:27:33,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:27:33,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:27:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:33,751 INFO L87 Difference]: Start difference. First operand 3254 states and 8410 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2021-08-12 19:27:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:35,179 INFO L93 Difference]: Finished difference Result 3932 states and 9908 transitions. [2021-08-12 19:27:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:27:35,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 30 [2021-08-12 19:27:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:35,187 INFO L225 Difference]: With dead ends: 3932 [2021-08-12 19:27:35,187 INFO L226 Difference]: Without dead ends: 3923 [2021-08-12 19:27:35,187 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:27:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2021-08-12 19:27:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3481. [2021-08-12 19:27:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3480 states have (on average 2.5977011494252875) internal successors, (9040), 3480 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 9040 transitions. [2021-08-12 19:27:35,500 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 9040 transitions. Word has length 30 [2021-08-12 19:27:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:35,501 INFO L482 AbstractCegarLoop]: Abstraction has 3481 states and 9040 transitions. [2021-08-12 19:27:35,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2021-08-12 19:27:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 9040 transitions. [2021-08-12 19:27:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:35,505 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:35,505 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:35,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:35,720 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:35,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1501992374, now seen corresponding path program 51 times [2021-08-12 19:27:35,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:35,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896365369] [2021-08-12 19:27:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:35,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896365369] [2021-08-12 19:27:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896365369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967494061] [2021-08-12 19:27:35,828 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 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 [2021-08-12 19:27:35,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:27:35,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:36,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967494061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:36,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:36,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-12 19:27:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290458600] [2021-08-12 19:27:36,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:27:36,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:27:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:27:36,118 INFO L87 Difference]: Start difference. First operand 3481 states and 9040 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:38,913 INFO L93 Difference]: Finished difference Result 4417 states and 11083 transitions. [2021-08-12 19:27:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-12 19:27:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 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 32 [2021-08-12 19:27:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:38,919 INFO L225 Difference]: With dead ends: 4417 [2021-08-12 19:27:38,919 INFO L226 Difference]: Without dead ends: 4394 [2021-08-12 19:27:38,920 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 1017.9ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:27:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-08-12 19:27:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3164. [2021-08-12 19:27:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 2.5861523869743914) internal successors, (8180), 3163 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 8180 transitions. [2021-08-12 19:27:39,229 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 8180 transitions. Word has length 32 [2021-08-12 19:27:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:39,229 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 8180 transitions. [2021-08-12 19:27:39,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 8180 transitions. [2021-08-12 19:27:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:39,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:39,232 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:39,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-12 19:27:39,433 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash 783257330, now seen corresponding path program 52 times [2021-08-12 19:27:39,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:39,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253199508] [2021-08-12 19:27:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:39,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:39,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253199508] [2021-08-12 19:27:39,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253199508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:39,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905351056] [2021-08-12 19:27:39,517 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 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 [2021-08-12 19:27:39,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:39,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905351056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:39,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:39,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:27:39,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61907722] [2021-08-12 19:27:39,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:27:39,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:39,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:27:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:27:39,753 INFO L87 Difference]: Start difference. First operand 3164 states and 8180 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:44,043 INFO L93 Difference]: Finished difference Result 5258 states and 12703 transitions. [2021-08-12 19:27:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-12 19:27:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 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 32 [2021-08-12 19:27:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:44,051 INFO L225 Difference]: With dead ends: 5258 [2021-08-12 19:27:44,051 INFO L226 Difference]: Without dead ends: 5139 [2021-08-12 19:27:44,052 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 1440.6ms TimeCoverageRelationStatistics Valid=1756, Invalid=6076, Unknown=0, NotChecked=0, Total=7832 [2021-08-12 19:27:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2021-08-12 19:27:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 3339. [2021-08-12 19:27:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.5820850808867584) internal successors, (8619), 3338 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8619 transitions. [2021-08-12 19:27:44,424 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8619 transitions. Word has length 32 [2021-08-12 19:27:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:44,424 INFO L482 AbstractCegarLoop]: Abstraction has 3339 states and 8619 transitions. [2021-08-12 19:27:44,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8619 transitions. [2021-08-12 19:27:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:44,427 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:44,427 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:44,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:44,628 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash 325676430, now seen corresponding path program 53 times [2021-08-12 19:27:44,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:44,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746073147] [2021-08-12 19:27:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:44,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746073147] [2021-08-12 19:27:44,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746073147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052461745] [2021-08-12 19:27:44,695 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 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 [2021-08-12 19:27:44,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:27:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052461745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:44,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:44,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:27:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498408794] [2021-08-12 19:27:44,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:27:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:27:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:27:44,974 INFO L87 Difference]: Start difference. First operand 3339 states and 8619 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:27:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:48,775 INFO L93 Difference]: Finished difference Result 6401 states and 16328 transitions. [2021-08-12 19:27:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:27:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-08-12 19:27:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:48,787 INFO L225 Difference]: With dead ends: 6401 [2021-08-12 19:27:48,787 INFO L226 Difference]: Without dead ends: 6347 [2021-08-12 19:27:48,789 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 1228.0ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-08-12 19:27:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6347 states. [2021-08-12 19:27:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6347 to 4305. [2021-08-12 19:27:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5820167286245352) internal successors, (11113), 4304 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11113 transitions. [2021-08-12 19:27:49,244 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11113 transitions. Word has length 32 [2021-08-12 19:27:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:49,244 INFO L482 AbstractCegarLoop]: Abstraction has 4305 states and 11113 transitions. [2021-08-12 19:27:49,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:27:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11113 transitions. [2021-08-12 19:27:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:49,248 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:49,248 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:49,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-12 19:27:49,449 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1058221652, now seen corresponding path program 54 times [2021-08-12 19:27:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475006087] [2021-08-12 19:27:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:49,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:49,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475006087] [2021-08-12 19:27:49,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475006087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:49,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819166592] [2021-08-12 19:27:49,513 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 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 [2021-08-12 19:27:49,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:27:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819166592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:49,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:49,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:27:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966957311] [2021-08-12 19:27:49,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:27:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:27:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:27:49,742 INFO L87 Difference]: Start difference. First operand 4305 states and 11113 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:27:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:52,475 INFO L93 Difference]: Finished difference Result 4677 states and 11826 transitions. [2021-08-12 19:27:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:27:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-08-12 19:27:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:52,483 INFO L225 Difference]: With dead ends: 4677 [2021-08-12 19:27:52,483 INFO L226 Difference]: Without dead ends: 4660 [2021-08-12 19:27:52,484 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 916.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-08-12 19:27:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2021-08-12 19:27:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 4305. [2021-08-12 19:27:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5810873605947955) internal successors, (11109), 4304 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11109 transitions. [2021-08-12 19:27:52,931 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11109 transitions. Word has length 32 [2021-08-12 19:27:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:52,931 INFO L482 AbstractCegarLoop]: Abstraction has 4305 states and 11109 transitions. [2021-08-12 19:27:52,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:27:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11109 transitions. [2021-08-12 19:27:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:52,935 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:52,935 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:53,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-12 19:27:53,136 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1813615886, now seen corresponding path program 55 times [2021-08-12 19:27:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625087111] [2021-08-12 19:27:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:27:53,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625087111] [2021-08-12 19:27:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625087111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690067279] [2021-08-12 19:27:53,197 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 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 [2021-08-12 19:27:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:53,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690067279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:53,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:53,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:27:53,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395231588] [2021-08-12 19:27:53,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:27:53,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:27:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:27:53,428 INFO L87 Difference]: Start difference. First operand 4305 states and 11109 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:56,340 INFO L93 Difference]: Finished difference Result 5875 states and 14831 transitions. [2021-08-12 19:27:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:27:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 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 32 [2021-08-12 19:27:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:56,349 INFO L225 Difference]: With dead ends: 5875 [2021-08-12 19:27:56,349 INFO L226 Difference]: Without dead ends: 5818 [2021-08-12 19:27:56,350 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:27:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-08-12 19:27:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4428. [2021-08-12 19:27:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.5897899254574206) internal successors, (11465), 4427 states have internal predecessors, (11465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 11465 transitions. [2021-08-12 19:27:56,795 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 11465 transitions. Word has length 32 [2021-08-12 19:27:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:56,795 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 11465 transitions. [2021-08-12 19:27:56,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 11465 transitions. [2021-08-12 19:27:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:56,799 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:56,799 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:57,021 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -673820798, now seen corresponding path program 56 times [2021-08-12 19:27:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92977314] [2021-08-12 19:27:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:57,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:57,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92977314] [2021-08-12 19:27:57,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92977314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:57,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239760392] [2021-08-12 19:27:57,089 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 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 [2021-08-12 19:27:57,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:57,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:27:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:57,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239760392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:57,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-12 19:27:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156853935] [2021-08-12 19:27:57,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:27:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:57,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:27:57,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:27:57,334 INFO L87 Difference]: Start difference. First operand 4428 states and 11465 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-08-12 19:28:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:00,651 INFO L93 Difference]: Finished difference Result 5275 states and 13236 transitions. [2021-08-12 19:28:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:28:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-08-12 19:28:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:00,661 INFO L225 Difference]: With dead ends: 5275 [2021-08-12 19:28:00,661 INFO L226 Difference]: Without dead ends: 5238 [2021-08-12 19:28:00,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 19:28:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-08-12 19:28:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4516. [2021-08-12 19:28:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.5918050941306756) internal successors, (11702), 4515 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 11702 transitions. [2021-08-12 19:28:01,150 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 11702 transitions. Word has length 32 [2021-08-12 19:28:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:01,150 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 11702 transitions. [2021-08-12 19:28:01,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-08-12 19:28:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 11702 transitions. [2021-08-12 19:28:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:01,154 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:01,154 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:01,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:01,354 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1175991294, now seen corresponding path program 57 times [2021-08-12 19:28:01,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:01,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063665796] [2021-08-12 19:28:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:01,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063665796] [2021-08-12 19:28:01,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063665796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44534107] [2021-08-12 19:28:01,419 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 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 [2021-08-12 19:28:01,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-12 19:28:01,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44534107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:01,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:01,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-12 19:28:01,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221342033] [2021-08-12 19:28:01,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:01,665 INFO L87 Difference]: Start difference. First operand 4516 states and 11702 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-08-12 19:28:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:05,156 INFO L93 Difference]: Finished difference Result 5615 states and 13970 transitions. [2021-08-12 19:28:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:28:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-08-12 19:28:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:05,164 INFO L225 Difference]: With dead ends: 5615 [2021-08-12 19:28:05,164 INFO L226 Difference]: Without dead ends: 5566 [2021-08-12 19:28:05,165 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 903.4ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:28:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2021-08-12 19:28:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 4347. [2021-08-12 19:28:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 2.588587206626783) internal successors, (11250), 4346 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 11250 transitions. [2021-08-12 19:28:05,602 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 11250 transitions. Word has length 32 [2021-08-12 19:28:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:05,602 INFO L482 AbstractCegarLoop]: Abstraction has 4347 states and 11250 transitions. [2021-08-12 19:28:05,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-08-12 19:28:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 11250 transitions. [2021-08-12 19:28:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:05,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:05,607 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:05,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:05,807 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash 728951162, now seen corresponding path program 58 times [2021-08-12 19:28:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:05,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876943986] [2021-08-12 19:28:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:05,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:05,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876943986] [2021-08-12 19:28:05,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876943986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:05,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888041701] [2021-08-12 19:28:05,892 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 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 [2021-08-12 19:28:05,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888041701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:06,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 19:28:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831141930] [2021-08-12 19:28:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:06,141 INFO L87 Difference]: Start difference. First operand 4347 states and 11250 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-08-12 19:28:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:10,158 INFO L93 Difference]: Finished difference Result 5737 states and 14116 transitions. [2021-08-12 19:28:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-12 19:28:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-08-12 19:28:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:10,169 INFO L225 Difference]: With dead ends: 5737 [2021-08-12 19:28:10,169 INFO L226 Difference]: Without dead ends: 5686 [2021-08-12 19:28:10,170 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1030.5ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:28:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-08-12 19:28:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3872. [2021-08-12 19:28:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.579178506845776) internal successors, (9984), 3871 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 9984 transitions. [2021-08-12 19:28:10,625 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 9984 transitions. Word has length 32 [2021-08-12 19:28:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:10,625 INFO L482 AbstractCegarLoop]: Abstraction has 3872 states and 9984 transitions. [2021-08-12 19:28:10,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-08-12 19:28:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 9984 transitions. [2021-08-12 19:28:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:10,628 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:10,628 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:10,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-12 19:28:10,828 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1717407562, now seen corresponding path program 59 times [2021-08-12 19:28:10,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:10,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213713466] [2021-08-12 19:28:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:10,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213713466] [2021-08-12 19:28:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213713466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:10,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589855572] [2021-08-12 19:28:10,926 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 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 [2021-08-12 19:28:10,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:10,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:10,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:11,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589855572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:11,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:11,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:28:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923391310] [2021-08-12 19:28:11,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:28:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:28:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:11,219 INFO L87 Difference]: Start difference. First operand 3872 states and 9984 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:15,049 INFO L93 Difference]: Finished difference Result 5216 states and 12880 transitions. [2021-08-12 19:28:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:28:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2021-08-12 19:28:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:15,057 INFO L225 Difference]: With dead ends: 5216 [2021-08-12 19:28:15,057 INFO L226 Difference]: Without dead ends: 5197 [2021-08-12 19:28:15,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 994.3ms TimeCoverageRelationStatistics Valid=1262, Invalid=3708, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:28:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2021-08-12 19:28:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 3402. [2021-08-12 19:28:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.5633637165539547) internal successors, (8718), 3401 states have internal predecessors, (8718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 8718 transitions. [2021-08-12 19:28:15,479 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 8718 transitions. Word has length 32 [2021-08-12 19:28:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:15,479 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 8718 transitions. [2021-08-12 19:28:15,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 8718 transitions. [2021-08-12 19:28:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:15,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:15,482 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:15,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-12 19:28:15,682 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1240500466, now seen corresponding path program 60 times [2021-08-12 19:28:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:15,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521841502] [2021-08-12 19:28:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:15,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521841502] [2021-08-12 19:28:15,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521841502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:15,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129553008] [2021-08-12 19:28:15,765 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 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 [2021-08-12 19:28:15,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:28:15,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129553008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 19:28:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366730494] [2021-08-12 19:28:15,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:15,986 INFO L87 Difference]: Start difference. First operand 3402 states and 8718 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-08-12 19:28:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:19,226 INFO L93 Difference]: Finished difference Result 4267 states and 10359 transitions. [2021-08-12 19:28:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-12 19:28:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 32 [2021-08-12 19:28:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:19,232 INFO L225 Difference]: With dead ends: 4267 [2021-08-12 19:28:19,233 INFO L226 Difference]: Without dead ends: 4186 [2021-08-12 19:28:19,233 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 969.0ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:28:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-08-12 19:28:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3264. [2021-08-12 19:28:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5485749310450507) internal successors, (8316), 3263 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8316 transitions. [2021-08-12 19:28:19,604 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8316 transitions. Word has length 32 [2021-08-12 19:28:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:19,605 INFO L482 AbstractCegarLoop]: Abstraction has 3264 states and 8316 transitions. [2021-08-12 19:28:19,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-08-12 19:28:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8316 transitions. [2021-08-12 19:28:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:19,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:19,607 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:19,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-12 19:28:19,807 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1425607606, now seen corresponding path program 61 times [2021-08-12 19:28:19,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:19,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656582253] [2021-08-12 19:28:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:19,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656582253] [2021-08-12 19:28:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656582253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778831724] [2021-08-12 19:28:19,897 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 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 [2021-08-12 19:28:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:20,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778831724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:20,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:20,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 19:28:20,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006062397] [2021-08-12 19:28:20,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:20,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:20,146 INFO L87 Difference]: Start difference. First operand 3264 states and 8316 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:24,167 INFO L93 Difference]: Finished difference Result 4900 states and 11934 transitions. [2021-08-12 19:28:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-12 19:28:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2021-08-12 19:28:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:24,175 INFO L225 Difference]: With dead ends: 4900 [2021-08-12 19:28:24,175 INFO L226 Difference]: Without dead ends: 4881 [2021-08-12 19:28:24,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1052.1ms TimeCoverageRelationStatistics Valid=1473, Invalid=4077, Unknown=0, NotChecked=0, Total=5550 [2021-08-12 19:28:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-08-12 19:28:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 2860. [2021-08-12 19:28:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.5183630640083945) internal successors, (7200), 2859 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 7200 transitions. [2021-08-12 19:28:24,576 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 7200 transitions. Word has length 32 [2021-08-12 19:28:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:24,576 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 7200 transitions. [2021-08-12 19:28:24,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 7200 transitions. [2021-08-12 19:28:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:24,578 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:24,578 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:24,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-12 19:28:24,779 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1428685554, now seen corresponding path program 62 times [2021-08-12 19:28:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:24,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285419820] [2021-08-12 19:28:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:24,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285419820] [2021-08-12 19:28:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285419820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465931506] [2021-08-12 19:28:24,853 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 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 [2021-08-12 19:28:24,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465931506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:25,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:25,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-12 19:28:25,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813086568] [2021-08-12 19:28:25,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:25,080 INFO L87 Difference]: Start difference. First operand 2860 states and 7200 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-08-12 19:28:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:27,970 INFO L93 Difference]: Finished difference Result 3676 states and 8860 transitions. [2021-08-12 19:28:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 19:28:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-08-12 19:28:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:27,975 INFO L225 Difference]: With dead ends: 3676 [2021-08-12 19:28:27,975 INFO L226 Difference]: Without dead ends: 3622 [2021-08-12 19:28:27,975 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-08-12 19:28:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2021-08-12 19:28:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 2809. [2021-08-12 19:28:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.508190883190883) internal successors, (7043), 2808 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7043 transitions. [2021-08-12 19:28:28,337 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7043 transitions. Word has length 32 [2021-08-12 19:28:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:28,337 INFO L482 AbstractCegarLoop]: Abstraction has 2809 states and 7043 transitions. [2021-08-12 19:28:28,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-08-12 19:28:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7043 transitions. [2021-08-12 19:28:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:28,339 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:28,339 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:28,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:28,540 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1690671434, now seen corresponding path program 63 times [2021-08-12 19:28:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584095370] [2021-08-12 19:28:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:28,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:28,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584095370] [2021-08-12 19:28:28,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584095370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:28,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964420647] [2021-08-12 19:28:28,617 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:28,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:28:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:28,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964420647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:28,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:28,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-12 19:28:28,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925461812] [2021-08-12 19:28:28,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:28,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:28,862 INFO L87 Difference]: Start difference. First operand 2809 states and 7043 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:32,949 INFO L93 Difference]: Finished difference Result 4930 states and 11865 transitions. [2021-08-12 19:28:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-12 19:28:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2021-08-12 19:28:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:32,956 INFO L225 Difference]: With dead ends: 4930 [2021-08-12 19:28:32,956 INFO L226 Difference]: Without dead ends: 4911 [2021-08-12 19:28:32,957 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:28:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-08-12 19:28:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 3307. [2021-08-12 19:28:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3306 states have (on average 2.481246218995765) internal successors, (8203), 3306 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 8203 transitions. [2021-08-12 19:28:33,376 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 8203 transitions. Word has length 32 [2021-08-12 19:28:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:33,376 INFO L482 AbstractCegarLoop]: Abstraction has 3307 states and 8203 transitions. [2021-08-12 19:28:33,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 8203 transitions. [2021-08-12 19:28:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:33,378 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:33,378 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:33,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:33,585 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash -604635918, now seen corresponding path program 64 times [2021-08-12 19:28:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:33,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835088376] [2021-08-12 19:28:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:33,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:33,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835088376] [2021-08-12 19:28:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835088376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:33,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070856203] [2021-08-12 19:28:33,649 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:33,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:33,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:33,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070856203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:33,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:33,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-12 19:28:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694182259] [2021-08-12 19:28:33,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:33,902 INFO L87 Difference]: Start difference. First operand 3307 states and 8203 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2021-08-12 19:28:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:36,639 INFO L93 Difference]: Finished difference Result 3855 states and 9292 transitions. [2021-08-12 19:28:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:28:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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 32 [2021-08-12 19:28:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:36,645 INFO L225 Difference]: With dead ends: 3855 [2021-08-12 19:28:36,647 INFO L226 Difference]: Without dead ends: 3822 [2021-08-12 19:28:36,648 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:28:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-08-12 19:28:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3381. [2021-08-12 19:28:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 2.486094674556213) internal successors, (8403), 3380 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 8403 transitions. [2021-08-12 19:28:37,075 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 8403 transitions. Word has length 32 [2021-08-12 19:28:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:37,075 INFO L482 AbstractCegarLoop]: Abstraction has 3381 states and 8403 transitions. [2021-08-12 19:28:37,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2021-08-12 19:28:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 8403 transitions. [2021-08-12 19:28:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:37,077 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:37,078 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:37,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:37,278 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1474920010, now seen corresponding path program 65 times [2021-08-12 19:28:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:37,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960630247] [2021-08-12 19:28:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:37,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:37,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960630247] [2021-08-12 19:28:37,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960630247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861008853] [2021-08-12 19:28:37,351 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:37,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:37,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:37,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861008853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:37,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:37,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-12 19:28:37,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007958242] [2021-08-12 19:28:37,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:37,603 INFO L87 Difference]: Start difference. First operand 3381 states and 8403 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:41,833 INFO L93 Difference]: Finished difference Result 6193 states and 15138 transitions. [2021-08-12 19:28:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:28:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 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 32 [2021-08-12 19:28:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:41,841 INFO L225 Difference]: With dead ends: 6193 [2021-08-12 19:28:41,842 INFO L226 Difference]: Without dead ends: 6180 [2021-08-12 19:28:41,842 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1197.8ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-08-12 19:28:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6180 states. [2021-08-12 19:28:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6180 to 5144. [2021-08-12 19:28:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5143 states have (on average 2.52109663620455) internal successors, (12966), 5143 states have internal predecessors, (12966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 12966 transitions. [2021-08-12 19:28:42,446 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 12966 transitions. Word has length 32 [2021-08-12 19:28:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:42,446 INFO L482 AbstractCegarLoop]: Abstraction has 5144 states and 12966 transitions. [2021-08-12 19:28:42,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 12966 transitions. [2021-08-12 19:28:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:42,450 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:42,450 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:42,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-12 19:28:42,650 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 874026652, now seen corresponding path program 66 times [2021-08-12 19:28:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:42,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889575010] [2021-08-12 19:28:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889575010] [2021-08-12 19:28:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889575010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016514076] [2021-08-12 19:28:42,706 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:42,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:28:42,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:42,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016514076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:42,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:42,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:28:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893299723] [2021-08-12 19:28:42,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:28:42,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:28:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:28:42,911 INFO L87 Difference]: Start difference. First operand 5144 states and 12966 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:28:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:47,005 INFO L93 Difference]: Finished difference Result 6026 states and 14709 transitions. [2021-08-12 19:28:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:28:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-08-12 19:28:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:47,015 INFO L225 Difference]: With dead ends: 6026 [2021-08-12 19:28:47,016 INFO L226 Difference]: Without dead ends: 6005 [2021-08-12 19:28:47,017 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 758.6ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:28:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-08-12 19:28:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5062. [2021-08-12 19:28:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5061 states have (on average 2.517091483896463) internal successors, (12739), 5061 states have internal predecessors, (12739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 12739 transitions. [2021-08-12 19:28:47,615 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 12739 transitions. Word has length 32 [2021-08-12 19:28:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:47,615 INFO L482 AbstractCegarLoop]: Abstraction has 5062 states and 12739 transitions. [2021-08-12 19:28:47,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:28:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 12739 transitions. [2021-08-12 19:28:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:47,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:47,621 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,837 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 367680386, now seen corresponding path program 67 times [2021-08-12 19:28:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644463648] [2021-08-12 19:28:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:47,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644463648] [2021-08-12 19:28:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644463648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97602550] [2021-08-12 19:28:47,905 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97602550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-12 19:28:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151450791] [2021-08-12 19:28:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:48,162 INFO L87 Difference]: Start difference. First operand 5062 states and 12739 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-08-12 19:28:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:52,039 INFO L93 Difference]: Finished difference Result 6257 states and 15301 transitions. [2021-08-12 19:28:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:28:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-08-12 19:28:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:52,049 INFO L225 Difference]: With dead ends: 6257 [2021-08-12 19:28:52,049 INFO L226 Difference]: Without dead ends: 6232 [2021-08-12 19:28:52,050 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:28:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2021-08-12 19:28:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5108. [2021-08-12 19:28:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.522811826904249) internal successors, (12884), 5107 states have internal predecessors, (12884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 12884 transitions. [2021-08-12 19:28:52,678 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 12884 transitions. Word has length 32 [2021-08-12 19:28:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:52,678 INFO L482 AbstractCegarLoop]: Abstraction has 5108 states and 12884 transitions. [2021-08-12 19:28:52,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-08-12 19:28:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 12884 transitions. [2021-08-12 19:28:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:52,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:52,683 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:52,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:52,883 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 140459006, now seen corresponding path program 68 times [2021-08-12 19:28:52,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:52,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028668629] [2021-08-12 19:28:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:52,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028668629] [2021-08-12 19:28:52,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028668629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765921385] [2021-08-12 19:28:52,959 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:52,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:52,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:53,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765921385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:53,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:53,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-12 19:28:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630750456] [2021-08-12 19:28:53,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:53,176 INFO L87 Difference]: Start difference. First operand 5108 states and 12884 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-08-12 19:28:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:57,457 INFO L93 Difference]: Finished difference Result 6735 states and 16437 transitions. [2021-08-12 19:28:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:28:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-08-12 19:28:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:57,468 INFO L225 Difference]: With dead ends: 6735 [2021-08-12 19:28:57,468 INFO L226 Difference]: Without dead ends: 6702 [2021-08-12 19:28:57,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 19:28:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2021-08-12 19:28:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 5738. [2021-08-12 19:28:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 2.5281506013595956) internal successors, (14504), 5737 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 14504 transitions. [2021-08-12 19:28:58,149 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 14504 transitions. Word has length 32 [2021-08-12 19:28:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:58,150 INFO L482 AbstractCegarLoop]: Abstraction has 5738 states and 14504 transitions. [2021-08-12 19:28:58,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-08-12 19:28:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 14504 transitions. [2021-08-12 19:28:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:58,154 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:58,154 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:58,357 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 824044922, now seen corresponding path program 69 times [2021-08-12 19:28:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465982014] [2021-08-12 19:28:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:28:58,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:58,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465982014] [2021-08-12 19:28:58,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465982014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:58,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100953140] [2021-08-12 19:28:58,432 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:58,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:28:58,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:58,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:58,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100953140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:58,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:58,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 19:28:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279713439] [2021-08-12 19:28:58,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:58,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:58,661 INFO L87 Difference]: Start difference. First operand 5738 states and 14504 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-08-12 19:29:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:03,546 INFO L93 Difference]: Finished difference Result 7647 states and 18660 transitions. [2021-08-12 19:29:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-12 19:29:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-08-12 19:29:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:03,558 INFO L225 Difference]: With dead ends: 7647 [2021-08-12 19:29:03,558 INFO L226 Difference]: Without dead ends: 7606 [2021-08-12 19:29:03,559 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 19:29:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2021-08-12 19:29:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 6549. [2021-08-12 19:29:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 6548 states have (on average 2.5284056200366525) internal successors, (16556), 6548 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 16556 transitions. [2021-08-12 19:29:04,328 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 16556 transitions. Word has length 32 [2021-08-12 19:29:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:04,328 INFO L482 AbstractCegarLoop]: Abstraction has 6549 states and 16556 transitions. [2021-08-12 19:29:04,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-08-12 19:29:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 16556 transitions. [2021-08-12 19:29:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:29:04,332 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:04,332 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:04,537 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash 620113910, now seen corresponding path program 70 times [2021-08-12 19:29:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105212639] [2021-08-12 19:29:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105212639] [2021-08-12 19:29:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105212639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284420103] [2021-08-12 19:29:04,630 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:04,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:29:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284420103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:04,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:29:04,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562587430] [2021-08-12 19:29:04,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:29:04,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:29:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:29:04,872 INFO L87 Difference]: Start difference. First operand 6549 states and 16556 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-08-12 19:29:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:09,659 INFO L93 Difference]: Finished difference Result 7624 states and 18750 transitions. [2021-08-12 19:29:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 19:29:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 32 [2021-08-12 19:29:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:09,671 INFO L225 Difference]: With dead ends: 7624 [2021-08-12 19:29:09,671 INFO L226 Difference]: Without dead ends: 7575 [2021-08-12 19:29:09,672 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1028.3ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-08-12 19:29:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2021-08-12 19:29:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 6635. [2021-08-12 19:29:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.537232438950859) internal successors, (16832), 6634 states have internal predecessors, (16832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 16832 transitions. [2021-08-12 19:29:10,410 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 16832 transitions. Word has length 32 [2021-08-12 19:29:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 16832 transitions. [2021-08-12 19:29:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-08-12 19:29:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 16832 transitions. [2021-08-12 19:29:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:10,415 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:10,415 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:10,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-12 19:29:10,615 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash -617394444, now seen corresponding path program 71 times [2021-08-12 19:29:10,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:10,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589543263] [2021-08-12 19:29:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:10,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:10,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589543263] [2021-08-12 19:29:10,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589543263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:10,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965733449] [2021-08-12 19:29:10,661 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:10,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:29:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:29:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:10,926 INFO L354 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2021-08-12 19:29:10,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 105 [2021-08-12 19:29:11,121 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:29:11,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:11,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:29:11,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:169 [2021-08-12 19:29:11,460 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-12 19:29:11,807 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-12 19:29:12,160 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2021-08-12 19:29:12,454 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-08-12 19:29:12,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 75 [2021-08-12 19:29:12,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:12,465 INFO L628 ElimStorePlain]: treesize reduction 393, result has 0.8 percent of original size [2021-08-12 19:29:12,465 INFO L518 ElimStorePlain]: Eliminatee f_inv vanished before elimination [2021-08-12 19:29:12,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-08-12 19:29:12,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-08-12 19:29:12,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-08-12 19:29:12,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:12,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:486, output treesize:3 [2021-08-12 19:29:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965733449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:12,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:12,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006631315] [2021-08-12 19:29:12,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:12,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:12,475 INFO L87 Difference]: Start difference. First operand 6635 states and 16832 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:15,740 INFO L93 Difference]: Finished difference Result 7763 states and 19543 transitions. [2021-08-12 19:29:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:29:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-08-12 19:29:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:15,754 INFO L225 Difference]: With dead ends: 7763 [2021-08-12 19:29:15,754 INFO L226 Difference]: Without dead ends: 7754 [2021-08-12 19:29:15,756 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:29:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2021-08-12 19:29:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7360. [2021-08-12 19:29:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 2.545726321511075) internal successors, (18734), 7359 states have internal predecessors, (18734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 18734 transitions. [2021-08-12 19:29:16,691 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 18734 transitions. Word has length 34 [2021-08-12 19:29:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:16,691 INFO L482 AbstractCegarLoop]: Abstraction has 7360 states and 18734 transitions. [2021-08-12 19:29:16,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 18734 transitions. [2021-08-12 19:29:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:16,698 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:16,698 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:16,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-12 19:29:16,910 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -100122124, now seen corresponding path program 72 times [2021-08-12 19:29:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353389976] [2021-08-12 19:29:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353389976] [2021-08-12 19:29:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353389976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379023078] [2021-08-12 19:29:16,952 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:16,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:29:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:16,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:29:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:17,167 INFO L446 ElimStorePlain]: Different costs {10=[f], 36=[f_inv]} [2021-08-12 19:29:17,206 INFO L354 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2021-08-12 19:29:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 120 [2021-08-12 19:29:17,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:29:17,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:17,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 147 [2021-08-12 19:29:17,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:17,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:17,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:17,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:3 [2021-08-12 19:29:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:29:17,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379023078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:17,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:17,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:17,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571953375] [2021-08-12 19:29:17,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:17,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:17,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:17,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:17,832 INFO L87 Difference]: Start difference. First operand 7360 states and 18734 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:20,951 INFO L93 Difference]: Finished difference Result 8010 states and 20273 transitions. [2021-08-12 19:29:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:29:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-08-12 19:29:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:20,963 INFO L225 Difference]: With dead ends: 8010 [2021-08-12 19:29:20,963 INFO L226 Difference]: Without dead ends: 7999 [2021-08-12 19:29:20,964 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2021-08-12 19:29:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7776. [2021-08-12 19:29:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 2.5569131832797427) internal successors, (19880), 7775 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 19880 transitions. [2021-08-12 19:29:21,941 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 19880 transitions. Word has length 34 [2021-08-12 19:29:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:21,941 INFO L482 AbstractCegarLoop]: Abstraction has 7776 states and 19880 transitions. [2021-08-12 19:29:21,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 19880 transitions. [2021-08-12 19:29:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:21,948 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:21,948 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:22,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-08-12 19:29:22,171 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1652349196, now seen corresponding path program 73 times [2021-08-12 19:29:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:22,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502046591] [2021-08-12 19:29:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:22,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502046591] [2021-08-12 19:29:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502046591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360524879] [2021-08-12 19:29:22,210 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:29:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:22,436 INFO L354 Elim1Store]: treesize reduction 154, result has 36.1 percent of original size [2021-08-12 19:29:22,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 127 [2021-08-12 19:29:22,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:22,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:22,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:22,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:119, output treesize:136 [2021-08-12 19:29:22,527 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-12 19:29:22,690 INFO L446 ElimStorePlain]: Different costs {3=[f], 6=[v_prenex_54], 10=[v_prenex_55]} [2021-08-12 19:29:22,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:22,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:29:22,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:22,723 INFO L628 ElimStorePlain]: treesize reduction 113, result has 2.6 percent of original size [2021-08-12 19:29:22,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-08-12 19:29:22,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-08-12 19:29:22,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:22,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:132, output treesize:3 [2021-08-12 19:29:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:29:22,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360524879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:22,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:22,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082517049] [2021-08-12 19:29:22,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:22,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:22,735 INFO L87 Difference]: Start difference. First operand 7776 states and 19880 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:26,336 INFO L93 Difference]: Finished difference Result 8651 states and 21918 transitions. [2021-08-12 19:29:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:29:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-08-12 19:29:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:26,353 INFO L225 Difference]: With dead ends: 8651 [2021-08-12 19:29:26,353 INFO L226 Difference]: Without dead ends: 8624 [2021-08-12 19:29:26,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-08-12 19:29:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 8091. [2021-08-12 19:29:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 2.5673671199011125) internal successors, (20770), 8090 states have internal predecessors, (20770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 20770 transitions. [2021-08-12 19:29:27,373 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 20770 transitions. Word has length 34 [2021-08-12 19:29:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:27,373 INFO L482 AbstractCegarLoop]: Abstraction has 8091 states and 20770 transitions. [2021-08-12 19:29:27,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 20770 transitions. [2021-08-12 19:29:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:27,378 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:27,379 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:27,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:27,579 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1306053620, now seen corresponding path program 74 times [2021-08-12 19:29:27,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:27,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038965315] [2021-08-12 19:29:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:27,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038965315] [2021-08-12 19:29:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038965315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93004810] [2021-08-12 19:29:27,624 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:27,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:29:27,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:27,809 INFO L354 Elim1Store]: treesize reduction 79, result has 47.7 percent of original size [2021-08-12 19:29:27,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 110 [2021-08-12 19:29:27,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:27,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:27,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:27,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:117, output treesize:132 [2021-08-12 19:29:27,914 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-12 19:29:28,129 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2021-08-12 19:29:28,227 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_58], 10=[f, v_prenex_59]} [2021-08-12 19:29:28,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:28,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 19:29:28,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:28,256 INFO L628 ElimStorePlain]: treesize reduction 153, result has 1.9 percent of original size [2021-08-12 19:29:28,256 INFO L518 ElimStorePlain]: Eliminatee f vanished before elimination [2021-08-12 19:29:28,256 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-08-12 19:29:28,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:28,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:176, output treesize:3 [2021-08-12 19:29:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:29:28,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93004810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:28,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:28,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:28,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078788074] [2021-08-12 19:29:28,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:28,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:28,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:28,265 INFO L87 Difference]: Start difference. First operand 8091 states and 20770 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:32,094 INFO L93 Difference]: Finished difference Result 9129 states and 23215 transitions. [2021-08-12 19:29:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:29:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-08-12 19:29:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:32,110 INFO L225 Difference]: With dead ends: 9129 [2021-08-12 19:29:32,110 INFO L226 Difference]: Without dead ends: 9098 [2021-08-12 19:29:32,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2021-08-12 19:29:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8475. [2021-08-12 19:29:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 2.577059240028322) internal successors, (21838), 8474 states have internal predecessors, (21838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 21838 transitions. [2021-08-12 19:29:33,186 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 21838 transitions. Word has length 34 [2021-08-12 19:29:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:33,186 INFO L482 AbstractCegarLoop]: Abstraction has 8475 states and 21838 transitions. [2021-08-12 19:29:33,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 21838 transitions. [2021-08-12 19:29:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:33,191 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:33,191 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:33,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:33,392 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1062809844, now seen corresponding path program 75 times [2021-08-12 19:29:33,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:33,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261605344] [2021-08-12 19:29:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:33,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261605344] [2021-08-12 19:29:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261605344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112774436] [2021-08-12 19:29:33,431 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:33,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:29:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:29:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:33,664 INFO L446 ElimStorePlain]: Different costs {15=[f_inv], 28=[f]} [2021-08-12 19:29:33,710 INFO L354 Elim1Store]: treesize reduction 74, result has 43.5 percent of original size [2021-08-12 19:29:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 158 treesize of output 123 [2021-08-12 19:29:33,898 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:29:33,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:33,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 144 [2021-08-12 19:29:34,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:34,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:34,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:34,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:3 [2021-08-12 19:29:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:29:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112774436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:34,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:34,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:34,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254550994] [2021-08-12 19:29:34,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:34,084 INFO L87 Difference]: Start difference. First operand 8475 states and 21838 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:38,130 INFO L93 Difference]: Finished difference Result 9520 states and 24333 transitions. [2021-08-12 19:29:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:29:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-08-12 19:29:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:38,144 INFO L225 Difference]: With dead ends: 9520 [2021-08-12 19:29:38,144 INFO L226 Difference]: Without dead ends: 9492 [2021-08-12 19:29:38,145 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2021-08-12 19:29:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 8919. [2021-08-12 19:29:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.588024220677282) internal successors, (23080), 8918 states have internal predecessors, (23080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23080 transitions. [2021-08-12 19:29:39,296 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23080 transitions. Word has length 34 [2021-08-12 19:29:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:39,296 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 23080 transitions. [2021-08-12 19:29:39,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23080 transitions. [2021-08-12 19:29:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:29:39,303 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:39,303 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:39,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:39,504 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -766224908, now seen corresponding path program 76 times [2021-08-12 19:29:39,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:39,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635951113] [2021-08-12 19:29:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:39,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635951113] [2021-08-12 19:29:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635951113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221855329] [2021-08-12 19:29:39,538 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:39,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:29:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:39,680 INFO L354 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2021-08-12 19:29:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2021-08-12 19:29:39,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:39,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:39,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:39,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:162 [2021-08-12 19:29:39,833 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-08-12 19:29:40,225 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2021-08-12 19:29:40,611 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-08-12 19:29:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 75 [2021-08-12 19:29:40,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:40,623 INFO L628 ElimStorePlain]: treesize reduction 393, result has 0.8 percent of original size [2021-08-12 19:29:40,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-08-12 19:29:40,623 INFO L518 ElimStorePlain]: Eliminatee f vanished before elimination [2021-08-12 19:29:40,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-08-12 19:29:40,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-08-12 19:29:40,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:40,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:486, output treesize:3 [2021-08-12 19:29:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:29:40,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221855329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:40,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 17 [2021-08-12 19:29:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700774409] [2021-08-12 19:29:40,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:29:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:29:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:40,632 INFO L87 Difference]: Start difference. First operand 8919 states and 23080 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) [2021-08-12 19:29:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:45,032 INFO L93 Difference]: Finished difference Result 9869 states and 25211 transitions. [2021-08-12 19:29:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:29:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 34 [2021-08-12 19:29:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:45,050 INFO L225 Difference]: With dead ends: 9869 [2021-08-12 19:29:45,050 INFO L226 Difference]: Without dead ends: 9860 [2021-08-12 19:29:45,052 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:29:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9860 states. [2021-08-12 19:29:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9860 to 9257. [2021-08-12 19:29:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 2.5956136560069143) internal successors, (24025), 9256 states have internal predecessors, (24025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 24025 transitions. [2021-08-12 19:29:46,246 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 24025 transitions. Word has length 34 [2021-08-12 19:29:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:46,247 INFO L482 AbstractCegarLoop]: Abstraction has 9257 states and 24025 transitions. [2021-08-12 19:29:46,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) [2021-08-12 19:29:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 24025 transitions. [2021-08-12 19:29:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:29:46,254 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:46,254 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:46,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:46,454 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1975981686, now seen corresponding path program 77 times [2021-08-12 19:29:46,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:46,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37423680] [2021-08-12 19:29:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:46,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:46,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37423680] [2021-08-12 19:29:46,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37423680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:46,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820907446] [2021-08-12 19:29:46,586 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:46,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:29:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:29:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:46,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820907446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:46,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:46,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-12 19:29:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964712718] [2021-08-12 19:29:46,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:29:46,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:29:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:29:46,924 INFO L87 Difference]: Start difference. First operand 9257 states and 24025 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:54,396 INFO L93 Difference]: Finished difference Result 10790 states and 27462 transitions. [2021-08-12 19:29:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:29:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 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 36 [2021-08-12 19:29:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:54,416 INFO L225 Difference]: With dead ends: 10790 [2021-08-12 19:29:54,416 INFO L226 Difference]: Without dead ends: 10763 [2021-08-12 19:29:54,417 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 1409.8ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:29:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10763 states. [2021-08-12 19:29:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10763 to 8556. [2021-08-12 19:29:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8556 states, 8555 states have (on average 2.586791350087668) internal successors, (22130), 8555 states have internal predecessors, (22130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8556 states to 8556 states and 22130 transitions. [2021-08-12 19:29:55,546 INFO L78 Accepts]: Start accepts. Automaton has 8556 states and 22130 transitions. Word has length 36 [2021-08-12 19:29:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:55,546 INFO L482 AbstractCegarLoop]: Abstraction has 8556 states and 22130 transitions. [2021-08-12 19:29:55,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8556 states and 22130 transitions. [2021-08-12 19:29:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:29:55,552 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:55,552 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-08-12 19:29:55,756 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1533628238, now seen corresponding path program 78 times [2021-08-12 19:29:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:55,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224782613] [2021-08-12 19:29:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:55,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:55,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224782613] [2021-08-12 19:29:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224782613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108931252] [2021-08-12 19:29:55,863 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:55,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:29:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:55,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:29:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:56,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108931252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:56,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:56,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-12 19:29:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212535943] [2021-08-12 19:29:56,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:29:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:29:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:29:56,137 INFO L87 Difference]: Start difference. First operand 8556 states and 22130 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:07,883 INFO L93 Difference]: Finished difference Result 12779 states and 31666 transitions. [2021-08-12 19:30:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-12 19:30:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 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 36 [2021-08-12 19:30:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:07,904 INFO L225 Difference]: With dead ends: 12779 [2021-08-12 19:30:07,904 INFO L226 Difference]: Without dead ends: 12621 [2021-08-12 19:30:07,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4553 ImplicationChecksByTransitivity, 2172.5ms TimeCoverageRelationStatistics Valid=2979, Invalid=10827, Unknown=0, NotChecked=0, Total=13806 [2021-08-12 19:30:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2021-08-12 19:30:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 8919. [2021-08-12 19:30:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.585557299843014) internal successors, (23058), 8918 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23058 transitions. [2021-08-12 19:30:09,292 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23058 transitions. Word has length 36 [2021-08-12 19:30:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:09,292 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 23058 transitions. [2021-08-12 19:30:09,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23058 transitions. [2021-08-12 19:30:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:30:09,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:09,299 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:09,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-08-12 19:30:09,500 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 800183698, now seen corresponding path program 79 times [2021-08-12 19:30:09,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:09,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323644545] [2021-08-12 19:30:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:09,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:09,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323644545] [2021-08-12 19:30:09,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323644545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:09,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163744752] [2021-08-12 19:30:09,576 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:30:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163744752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:09,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:09,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:30:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362614610] [2021-08-12 19:30:09,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:30:09,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:30:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:30:09,852 INFO L87 Difference]: Start difference. First operand 8919 states and 23058 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:20,315 INFO L93 Difference]: Finished difference Result 16331 states and 42244 transitions. [2021-08-12 19:30:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-12 19:30:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:30:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:20,343 INFO L225 Difference]: With dead ends: 16331 [2021-08-12 19:30:20,343 INFO L226 Difference]: Without dead ends: 16267 [2021-08-12 19:30:20,346 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 1625.8ms TimeCoverageRelationStatistics Valid=2811, Invalid=7695, Unknown=0, NotChecked=0, Total=10506 [2021-08-12 19:30:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16267 states. [2021-08-12 19:30:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16267 to 11626. [2021-08-12 19:30:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.584602150537634) internal successors, (30046), 11625 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30046 transitions. [2021-08-12 19:30:21,982 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30046 transitions. Word has length 36 [2021-08-12 19:30:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:21,982 INFO L482 AbstractCegarLoop]: Abstraction has 11626 states and 30046 transitions. [2021-08-12 19:30:21,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30046 transitions. [2021-08-12 19:30:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:30:21,989 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:21,989 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:22,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:22,190 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -583714384, now seen corresponding path program 80 times [2021-08-12 19:30:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:22,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645926103] [2021-08-12 19:30:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:22,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645926103] [2021-08-12 19:30:22,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645926103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618454439] [2021-08-12 19:30:22,258 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:22,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:30:22,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:30:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:22,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618454439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:22,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:22,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:30:22,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846940235] [2021-08-12 19:30:22,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:30:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:30:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:30:22,513 INFO L87 Difference]: Start difference. First operand 11626 states and 30046 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:29,724 INFO L93 Difference]: Finished difference Result 12204 states and 31183 transitions. [2021-08-12 19:30:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:30:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:30:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:29,749 INFO L225 Difference]: With dead ends: 12204 [2021-08-12 19:30:29,749 INFO L226 Difference]: Without dead ends: 12187 [2021-08-12 19:30:29,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 1246.4ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-08-12 19:30:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12187 states. [2021-08-12 19:30:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12187 to 11626. [2021-08-12 19:30:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.5839139784946235) internal successors, (30038), 11625 states have internal predecessors, (30038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30038 transitions. [2021-08-12 19:30:31,423 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30038 transitions. Word has length 36 [2021-08-12 19:30:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:31,423 INFO L482 AbstractCegarLoop]: Abstraction has 11626 states and 30038 transitions. [2021-08-12 19:30:31,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30038 transitions. [2021-08-12 19:30:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:30:31,432 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:31,432 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:31,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-08-12 19:30:31,633 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1643832242, now seen corresponding path program 81 times [2021-08-12 19:30:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:31,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737544118] [2021-08-12 19:30:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:30:31,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:31,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737544118] [2021-08-12 19:30:31,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737544118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:31,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499653055] [2021-08-12 19:30:31,695 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:31,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:30:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:30:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:31,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499653055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:31,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:31,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:30:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253832119] [2021-08-12 19:30:31,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:30:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:30:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:30:31,948 INFO L87 Difference]: Start difference. First operand 11626 states and 30038 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:40,431 INFO L93 Difference]: Finished difference Result 15261 states and 38957 transitions. [2021-08-12 19:30:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-12 19:30:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 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 36 [2021-08-12 19:30:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:40,458 INFO L225 Difference]: With dead ends: 15261 [2021-08-12 19:30:40,458 INFO L226 Difference]: Without dead ends: 15195 [2021-08-12 19:30:40,462 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=1176, Invalid=3654, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 19:30:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15195 states. [2021-08-12 19:30:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15195 to 11850. [2021-08-12 19:30:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 2.593467803190143) internal successors, (30730), 11849 states have internal predecessors, (30730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 30730 transitions. [2021-08-12 19:30:42,126 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 30730 transitions. Word has length 36 [2021-08-12 19:30:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 11850 states and 30730 transitions. [2021-08-12 19:30:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 30730 transitions. [2021-08-12 19:30:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:30:42,134 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:42,135 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:42,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:42,335 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1511339966, now seen corresponding path program 82 times [2021-08-12 19:30:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:42,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748977628] [2021-08-12 19:30:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:42,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748977628] [2021-08-12 19:30:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748977628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15810261] [2021-08-12 19:30:42,416 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:42,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:30:42,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:30:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:42,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15810261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:42,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:42,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-12 19:30:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071926706] [2021-08-12 19:30:42,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:30:42,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:42,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:30:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:30:42,751 INFO L87 Difference]: Start difference. First operand 11850 states and 30730 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:51,451 INFO L93 Difference]: Finished difference Result 13284 states and 33834 transitions. [2021-08-12 19:30:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:30:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:30:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:51,478 INFO L225 Difference]: With dead ends: 13284 [2021-08-12 19:30:51,478 INFO L226 Difference]: Without dead ends: 13241 [2021-08-12 19:30:51,482 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 1371.0ms TimeCoverageRelationStatistics Valid=1777, Invalid=5705, Unknown=0, NotChecked=0, Total=7482 [2021-08-12 19:30:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13241 states. [2021-08-12 19:30:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13241 to 12104. [2021-08-12 19:30:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5956374452615054) internal successors, (31415), 12103 states have internal predecessors, (31415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31415 transitions. [2021-08-12 19:30:53,158 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31415 transitions. Word has length 36 [2021-08-12 19:30:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:53,158 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31415 transitions. [2021-08-12 19:30:53,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31415 transitions. [2021-08-12 19:30:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:30:53,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:53,166 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:53,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:53,367 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1219841470, now seen corresponding path program 83 times [2021-08-12 19:30:53,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:53,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234629584] [2021-08-12 19:30:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:53,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:53,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234629584] [2021-08-12 19:30:53,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234629584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:53,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244136099] [2021-08-12 19:30:53,455 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:53,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-12 19:30:53,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:30:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:53,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244136099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:53,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:53,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-12 19:30:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679936725] [2021-08-12 19:30:53,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:30:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:30:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:30:53,745 INFO L87 Difference]: Start difference. First operand 12104 states and 31415 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:03,273 INFO L93 Difference]: Finished difference Result 13948 states and 35343 transitions. [2021-08-12 19:31:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-12 19:31:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:31:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:03,294 INFO L225 Difference]: With dead ends: 13948 [2021-08-12 19:31:03,294 INFO L226 Difference]: Without dead ends: 13889 [2021-08-12 19:31:03,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1267.9ms TimeCoverageRelationStatistics Valid=1841, Invalid=5991, Unknown=0, NotChecked=0, Total=7832 [2021-08-12 19:31:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2021-08-12 19:31:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 11939. [2021-08-12 19:31:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11939 states, 11938 states have (on average 2.5983414307254145) internal successors, (31019), 11938 states have internal predecessors, (31019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11939 states to 11939 states and 31019 transitions. [2021-08-12 19:31:04,896 INFO L78 Accepts]: Start accepts. Automaton has 11939 states and 31019 transitions. Word has length 36 [2021-08-12 19:31:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:04,896 INFO L482 AbstractCegarLoop]: Abstraction has 11939 states and 31019 transitions. [2021-08-12 19:31:04,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 11939 states and 31019 transitions. [2021-08-12 19:31:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:31:04,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:04,904 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:05,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:05,104 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1660183610, now seen corresponding path program 84 times [2021-08-12 19:31:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:05,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187009831] [2021-08-12 19:31:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:05,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:05,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187009831] [2021-08-12 19:31:05,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187009831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:05,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994548480] [2021-08-12 19:31:05,194 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:05,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-12 19:31:05,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:05,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994548480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:05,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:05,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-12 19:31:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337207140] [2021-08-12 19:31:05,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:31:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:05,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:31:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:31:05,494 INFO L87 Difference]: Start difference. First operand 11939 states and 31019 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:16,063 INFO L93 Difference]: Finished difference Result 14250 states and 35874 transitions. [2021-08-12 19:31:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-12 19:31:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:31:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:16,087 INFO L225 Difference]: With dead ends: 14250 [2021-08-12 19:31:16,088 INFO L226 Difference]: Without dead ends: 14185 [2021-08-12 19:31:16,090 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1278.2ms TimeCoverageRelationStatistics Valid=1915, Invalid=6275, Unknown=0, NotChecked=0, Total=8190 [2021-08-12 19:31:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2021-08-12 19:31:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 11149. [2021-08-12 19:31:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 2.601184068891281) internal successors, (28998), 11148 states have internal predecessors, (28998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 28998 transitions. [2021-08-12 19:31:17,699 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 28998 transitions. Word has length 36 [2021-08-12 19:31:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:17,700 INFO L482 AbstractCegarLoop]: Abstraction has 11149 states and 28998 transitions. [2021-08-12 19:31:17,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 28998 transitions. [2021-08-12 19:31:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:31:17,707 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:17,707 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:17,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-08-12 19:31:17,908 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:17,908 INFO L82 PathProgramCache]: Analyzing trace with hash -372782154, now seen corresponding path program 85 times [2021-08-12 19:31:17,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:17,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521512195] [2021-08-12 19:31:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:18,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521512195] [2021-08-12 19:31:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521512195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599559384] [2021-08-12 19:31:18,013 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:18,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599559384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:18,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:18,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:31:18,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069611919] [2021-08-12 19:31:18,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:31:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:31:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:31:18,277 INFO L87 Difference]: Start difference. First operand 11149 states and 28998 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:29,972 INFO L93 Difference]: Finished difference Result 14007 states and 34996 transitions. [2021-08-12 19:31:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 19:31:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:31:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:29,995 INFO L225 Difference]: With dead ends: 14007 [2021-08-12 19:31:29,995 INFO L226 Difference]: Without dead ends: 13948 [2021-08-12 19:31:29,998 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=1998, Invalid=6558, Unknown=0, NotChecked=0, Total=8556 [2021-08-12 19:31:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13948 states. [2021-08-12 19:31:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13948 to 9962. [2021-08-12 19:31:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 2.597731151490814) internal successors, (25876), 9961 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 25876 transitions. [2021-08-12 19:31:31,452 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 25876 transitions. Word has length 36 [2021-08-12 19:31:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:31,452 INFO L482 AbstractCegarLoop]: Abstraction has 9962 states and 25876 transitions. [2021-08-12 19:31:31,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 25876 transitions. [2021-08-12 19:31:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:31:31,458 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:31,458 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:31,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:31,659 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1742466442, now seen corresponding path program 86 times [2021-08-12 19:31:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:31,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089170136] [2021-08-12 19:31:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:31:31,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:31,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089170136] [2021-08-12 19:31:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089170136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:31,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76912394] [2021-08-12 19:31:31,771 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:31,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:32,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76912394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:32,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:32,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-12 19:31:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89478832] [2021-08-12 19:31:32,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:31:32,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:31:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:31:32,027 INFO L87 Difference]: Start difference. First operand 9962 states and 25876 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-08-12 19:31:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:42,623 INFO L93 Difference]: Finished difference Result 12345 states and 31116 transitions. [2021-08-12 19:31:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:31:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) Word has length 36 [2021-08-12 19:31:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:42,646 INFO L225 Difference]: With dead ends: 12345 [2021-08-12 19:31:42,646 INFO L226 Difference]: Without dead ends: 12322 [2021-08-12 19:31:42,649 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1308.9ms TimeCoverageRelationStatistics Valid=1981, Invalid=6029, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:31:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2021-08-12 19:31:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 8944. [2021-08-12 19:31:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.5896231689589624) internal successors, (23159), 8943 states have internal predecessors, (23159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 23159 transitions. [2021-08-12 19:31:44,012 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 23159 transitions. Word has length 36 [2021-08-12 19:31:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:44,012 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 23159 transitions. [2021-08-12 19:31:44,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-08-12 19:31:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 23159 transitions. [2021-08-12 19:31:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:31:44,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:44,017 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:44,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-08-12 19:31:44,221 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1833765810, now seen corresponding path program 87 times [2021-08-12 19:31:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:44,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948852792] [2021-08-12 19:31:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:31:44,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:44,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948852792] [2021-08-12 19:31:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948852792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:44,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438197979] [2021-08-12 19:31:44,312 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:44,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:31:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:44,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438197979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:44,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:44,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:31:44,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477086412] [2021-08-12 19:31:44,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:31:44,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:31:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:31:44,576 INFO L87 Difference]: Start difference. First operand 8944 states and 23159 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:53,486 INFO L93 Difference]: Finished difference Result 10641 states and 26481 transitions. [2021-08-12 19:31:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-12 19:31:53,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 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 36 [2021-08-12 19:31:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:53,507 INFO L225 Difference]: With dead ends: 10641 [2021-08-12 19:31:53,507 INFO L226 Difference]: Without dead ends: 10527 [2021-08-12 19:31:53,509 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 1477.1ms TimeCoverageRelationStatistics Valid=2020, Invalid=7486, Unknown=0, NotChecked=0, Total=9506 [2021-08-12 19:31:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-08-12 19:31:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 8656. [2021-08-12 19:31:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 2.577007510109763) internal successors, (22304), 8655 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 22304 transitions. [2021-08-12 19:31:54,823 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 22304 transitions. Word has length 36 [2021-08-12 19:31:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:54,824 INFO L482 AbstractCegarLoop]: Abstraction has 8656 states and 22304 transitions. [2021-08-12 19:31:54,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 22304 transitions. [2021-08-12 19:31:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:31:54,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:54,829 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:55,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-08-12 19:31:55,030 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1703939702, now seen corresponding path program 88 times [2021-08-12 19:31:55,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:55,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131970371] [2021-08-12 19:31:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:31:55,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131970371] [2021-08-12 19:31:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131970371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39236018] [2021-08-12 19:31:55,141 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:55,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:31:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:55,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39236018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:55,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:55,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:31:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169132338] [2021-08-12 19:31:55,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:31:55,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:31:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:31:55,398 INFO L87 Difference]: Start difference. First operand 8656 states and 22304 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-08-12 19:32:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:06,756 INFO L93 Difference]: Finished difference Result 11692 states and 29128 transitions. [2021-08-12 19:32:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-12 19:32:06,767 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) Word has length 36 [2021-08-12 19:32:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:06,788 INFO L225 Difference]: With dead ends: 11692 [2021-08-12 19:32:06,788 INFO L226 Difference]: Without dead ends: 11669 [2021-08-12 19:32:06,790 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 1473.1ms TimeCoverageRelationStatistics Valid=2270, Invalid=6660, Unknown=0, NotChecked=0, Total=8930 [2021-08-12 19:32:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11669 states. [2021-08-12 19:32:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11669 to 7769. [2021-08-12 19:32:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 2.5607621009268797) internal successors, (19892), 7768 states have internal predecessors, (19892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 19892 transitions. [2021-08-12 19:32:08,126 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 19892 transitions. Word has length 36 [2021-08-12 19:32:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:08,126 INFO L482 AbstractCegarLoop]: Abstraction has 7769 states and 19892 transitions. [2021-08-12 19:32:08,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-08-12 19:32:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 19892 transitions. [2021-08-12 19:32:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:32:08,131 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:08,131 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:08,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable742,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:08,331 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 366880434, now seen corresponding path program 89 times [2021-08-12 19:32:08,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:08,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873884452] [2021-08-12 19:32:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:08,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873884452] [2021-08-12 19:32:08,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873884452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841734106] [2021-08-12 19:32:08,423 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:08,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:32:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:32:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:08,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841734106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:08,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:08,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-12 19:32:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94206977] [2021-08-12 19:32:08,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:32:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:32:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:32:08,675 INFO L87 Difference]: Start difference. First operand 7769 states and 19892 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:16,598 INFO L93 Difference]: Finished difference Result 9373 states and 23245 transitions. [2021-08-12 19:32:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-12 19:32:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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 36 [2021-08-12 19:32:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:16,613 INFO L225 Difference]: With dead ends: 9373 [2021-08-12 19:32:16,613 INFO L226 Difference]: Without dead ends: 9292 [2021-08-12 19:32:16,614 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 1287.0ms TimeCoverageRelationStatistics Valid=1697, Invalid=6313, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:32:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2021-08-12 19:32:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 7746. [2021-08-12 19:32:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 2.5536475145255) internal successors, (19778), 7745 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 19778 transitions. [2021-08-12 19:32:17,872 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 19778 transitions. Word has length 36 [2021-08-12 19:32:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:17,872 INFO L482 AbstractCegarLoop]: Abstraction has 7746 states and 19778 transitions. [2021-08-12 19:32:17,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 19778 transitions. [2021-08-12 19:32:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:32:17,876 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:17,876 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:18,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:18,077 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1439369846, now seen corresponding path program 90 times [2021-08-12 19:32:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:18,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444112851] [2021-08-12 19:32:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:18,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:18,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444112851] [2021-08-12 19:32:18,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444112851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:18,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376812593] [2021-08-12 19:32:18,159 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:18,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:32:18,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:32:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:18,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376812593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:18,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:18,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-12 19:32:18,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975094852] [2021-08-12 19:32:18,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:32:18,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:32:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:32:18,411 INFO L87 Difference]: Start difference. First operand 7746 states and 19778 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2021-08-12 19:32:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:29,764 INFO L93 Difference]: Finished difference Result 11298 states and 27833 transitions. [2021-08-12 19:32:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-12 19:32:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) Word has length 36 [2021-08-12 19:32:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:29,781 INFO L225 Difference]: With dead ends: 11298 [2021-08-12 19:32:29,781 INFO L226 Difference]: Without dead ends: 11275 [2021-08-12 19:32:29,782 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 1559.0ms TimeCoverageRelationStatistics Valid=2740, Invalid=7562, Unknown=0, NotChecked=0, Total=10302 [2021-08-12 19:32:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2021-08-12 19:32:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 7094. [2021-08-12 19:32:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 7093 states have (on average 2.531791907514451) internal successors, (17958), 7093 states have internal predecessors, (17958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 17958 transitions. [2021-08-12 19:32:31,059 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 17958 transitions. Word has length 36 [2021-08-12 19:32:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:31,059 INFO L482 AbstractCegarLoop]: Abstraction has 7094 states and 17958 transitions. [2021-08-12 19:32:31,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2021-08-12 19:32:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 17958 transitions. [2021-08-12 19:32:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:32:31,064 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:31,064 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:31,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-08-12 19:32:31,265 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1442447794, now seen corresponding path program 91 times [2021-08-12 19:32:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:31,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631036716] [2021-08-12 19:32:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:31,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:31,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631036716] [2021-08-12 19:32:31,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631036716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:31,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216443038] [2021-08-12 19:32:31,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:32:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216443038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:31,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:31,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-12 19:32:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086077846] [2021-08-12 19:32:31,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:32:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:32:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:32:31,654 INFO L87 Difference]: Start difference. First operand 7094 states and 17958 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:38,648 INFO L93 Difference]: Finished difference Result 8406 states and 20807 transitions. [2021-08-12 19:32:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 19:32:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 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 36 [2021-08-12 19:32:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:38,663 INFO L225 Difference]: With dead ends: 8406 [2021-08-12 19:32:38,663 INFO L226 Difference]: Without dead ends: 8352 [2021-08-12 19:32:38,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1259.1ms TimeCoverageRelationStatistics Valid=1507, Invalid=5465, Unknown=0, NotChecked=0, Total=6972 [2021-08-12 19:32:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-08-12 19:32:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7183. [2021-08-12 19:32:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.532442216652743) internal successors, (18188), 7182 states have internal predecessors, (18188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 18188 transitions. [2021-08-12 19:32:39,953 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 18188 transitions. Word has length 36 [2021-08-12 19:32:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:39,953 INFO L482 AbstractCegarLoop]: Abstraction has 7183 states and 18188 transitions. [2021-08-12 19:32:39,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 18188 transitions. [2021-08-12 19:32:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:32:39,958 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:39,958 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:40,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-08-12 19:32:40,158 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -795539850, now seen corresponding path program 92 times [2021-08-12 19:32:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:40,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731013418] [2021-08-12 19:32:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:40,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731013418] [2021-08-12 19:32:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731013418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427904635] [2021-08-12 19:32:40,248 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:40,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:32:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:40,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427904635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:40,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:40,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-12 19:32:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502509420] [2021-08-12 19:32:40,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:32:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:32:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:32:40,499 INFO L87 Difference]: Start difference. First operand 7183 states and 18188 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2021-08-12 19:32:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:51,957 INFO L93 Difference]: Finished difference Result 11956 states and 29242 transitions. [2021-08-12 19:32:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-12 19:32:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) Word has length 36 [2021-08-12 19:32:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:51,976 INFO L225 Difference]: With dead ends: 11956 [2021-08-12 19:32:51,976 INFO L226 Difference]: Without dead ends: 11937 [2021-08-12 19:32:51,978 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 1678.6ms TimeCoverageRelationStatistics Valid=3216, Invalid=8340, Unknown=0, NotChecked=0, Total=11556 [2021-08-12 19:32:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11937 states. [2021-08-12 19:32:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11937 to 8770. [2021-08-12 19:32:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 2.5070133424563803) internal successors, (21984), 8769 states have internal predecessors, (21984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 21984 transitions. [2021-08-12 19:32:53,516 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 21984 transitions. Word has length 36 [2021-08-12 19:32:53,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:53,516 INFO L482 AbstractCegarLoop]: Abstraction has 8770 states and 21984 transitions. [2021-08-12 19:32:53,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2021-08-12 19:32:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 21984 transitions. [2021-08-12 19:32:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:32:53,521 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:53,521 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:53,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:53,722 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:53,722 INFO L82 PathProgramCache]: Analyzing trace with hash 290495666, now seen corresponding path program 93 times [2021-08-12 19:32:53,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:53,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970198623] [2021-08-12 19:32:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:53,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970198623] [2021-08-12 19:32:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970198623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171611968] [2021-08-12 19:32:53,801 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:53,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:32:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:32:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:54,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171611968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:54,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:54,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-12 19:32:54,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213821758] [2021-08-12 19:32:54,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:32:54,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:32:54,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:32:54,105 INFO L87 Difference]: Start difference. First operand 8770 states and 21984 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:01,353 INFO L93 Difference]: Finished difference Result 9559 states and 23587 transitions. [2021-08-12 19:33:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:33:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 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 36 [2021-08-12 19:33:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:01,373 INFO L225 Difference]: With dead ends: 9559 [2021-08-12 19:33:01,373 INFO L226 Difference]: Without dead ends: 9526 [2021-08-12 19:33:01,375 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 1171.9ms TimeCoverageRelationStatistics Valid=1407, Invalid=4913, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:33:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2021-08-12 19:33:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8902. [2021-08-12 19:33:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8902 states, 8901 states have (on average 2.510055049994383) internal successors, (22342), 8901 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 22342 transitions. [2021-08-12 19:33:02,953 INFO L78 Accepts]: Start accepts. Automaton has 8902 states and 22342 transitions. Word has length 36 [2021-08-12 19:33:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:02,953 INFO L482 AbstractCegarLoop]: Abstraction has 8902 states and 22342 transitions. [2021-08-12 19:33:02,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8902 states and 22342 transitions. [2021-08-12 19:33:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:33:02,958 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:02,958 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:03,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-08-12 19:33:03,159 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash 766378614, now seen corresponding path program 94 times [2021-08-12 19:33:03,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:03,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188872018] [2021-08-12 19:33:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:03,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:03,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188872018] [2021-08-12 19:33:03,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188872018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:03,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399093095] [2021-08-12 19:33:03,232 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:03,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:33:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399093095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:03,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:03,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-12 19:33:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712741531] [2021-08-12 19:33:03,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:33:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:33:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:33:03,486 INFO L87 Difference]: Start difference. First operand 8902 states and 22342 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:15,251 INFO L93 Difference]: Finished difference Result 15332 states and 37975 transitions. [2021-08-12 19:33:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-12 19:33:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 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 36 [2021-08-12 19:33:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:15,277 INFO L225 Difference]: With dead ends: 15332 [2021-08-12 19:33:15,277 INFO L226 Difference]: Without dead ends: 15319 [2021-08-12 19:33:15,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4780 ImplicationChecksByTransitivity, 1687.6ms TimeCoverageRelationStatistics Valid=3440, Invalid=8770, Unknown=0, NotChecked=0, Total=12210 [2021-08-12 19:33:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15319 states. [2021-08-12 19:33:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15319 to 13330. [2021-08-12 19:33:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13330 states, 13329 states have (on average 2.5292219971490733) internal successors, (33712), 13329 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13330 states to 13330 states and 33712 transitions. [2021-08-12 19:33:17,514 INFO L78 Accepts]: Start accepts. Automaton has 13330 states and 33712 transitions. Word has length 36 [2021-08-12 19:33:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:17,515 INFO L482 AbstractCegarLoop]: Abstraction has 13330 states and 33712 transitions. [2021-08-12 19:33:17,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 13330 states and 33712 transitions. [2021-08-12 19:33:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:33:17,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:17,522 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:17,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:17,722 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1179642020, now seen corresponding path program 95 times [2021-08-12 19:33:17,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:17,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432654579] [2021-08-12 19:33:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:17,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:17,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432654579] [2021-08-12 19:33:17,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432654579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:17,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241354173] [2021-08-12 19:33:17,794 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:17,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:33:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:33:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:18,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241354173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:18,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:18,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:33:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454546383] [2021-08-12 19:33:18,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:33:18,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:33:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:33:18,057 INFO L87 Difference]: Start difference. First operand 13330 states and 33712 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:28,718 INFO L93 Difference]: Finished difference Result 14945 states and 37000 transitions. [2021-08-12 19:33:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-12 19:33:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:33:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:28,741 INFO L225 Difference]: With dead ends: 14945 [2021-08-12 19:33:28,742 INFO L226 Difference]: Without dead ends: 14920 [2021-08-12 19:33:28,744 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 1050.2ms TimeCoverageRelationStatistics Valid=1750, Invalid=4570, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:33:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2021-08-12 19:33:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 13086. [2021-08-12 19:33:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13085 states have (on average 2.525792892625143) internal successors, (33050), 13085 states have internal predecessors, (33050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 33050 transitions. [2021-08-12 19:33:30,887 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 33050 transitions. Word has length 36 [2021-08-12 19:33:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:30,888 INFO L482 AbstractCegarLoop]: Abstraction has 13086 states and 33050 transitions. [2021-08-12 19:33:30,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 33050 transitions. [2021-08-12 19:33:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:33:30,894 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:30,894 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:31,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:31,098 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1685988286, now seen corresponding path program 96 times [2021-08-12 19:33:31,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:31,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755987662] [2021-08-12 19:33:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:31,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:31,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755987662] [2021-08-12 19:33:31,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755987662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650258491] [2021-08-12 19:33:31,178 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:31,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:33:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:33:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:31,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650258491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:31,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:31,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-12 19:33:31,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877424035] [2021-08-12 19:33:31,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:33:31,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:33:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:33:31,425 INFO L87 Difference]: Start difference. First operand 13086 states and 33050 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:42,502 INFO L93 Difference]: Finished difference Result 15299 states and 37916 transitions. [2021-08-12 19:33:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-12 19:33:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:33:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:42,526 INFO L225 Difference]: With dead ends: 15299 [2021-08-12 19:33:42,526 INFO L226 Difference]: Without dead ends: 15270 [2021-08-12 19:33:42,529 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-08-12 19:33:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2021-08-12 19:33:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 13017. [2021-08-12 19:33:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13017 states, 13016 states have (on average 2.528272894898586) internal successors, (32908), 13016 states have internal predecessors, (32908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13017 states to 13017 states and 32908 transitions. [2021-08-12 19:33:44,709 INFO L78 Accepts]: Start accepts. Automaton has 13017 states and 32908 transitions. Word has length 36 [2021-08-12 19:33:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:44,709 INFO L482 AbstractCegarLoop]: Abstraction has 13017 states and 32908 transitions. [2021-08-12 19:33:44,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13017 states and 32908 transitions. [2021-08-12 19:33:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:33:44,716 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:44,716 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-08-12 19:33:44,916 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1913209666, now seen corresponding path program 97 times [2021-08-12 19:33:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535336407] [2021-08-12 19:33:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:45,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:45,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535336407] [2021-08-12 19:33:45,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535336407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:45,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266905122] [2021-08-12 19:33:45,008 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:45,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:33:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266905122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-12 19:33:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557290977] [2021-08-12 19:33:45,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:33:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:33:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:33:45,296 INFO L87 Difference]: Start difference. First operand 13017 states and 32908 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:57,365 INFO L93 Difference]: Finished difference Result 16052 states and 39761 transitions. [2021-08-12 19:33:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-12 19:33:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:33:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:57,396 INFO L225 Difference]: With dead ends: 16052 [2021-08-12 19:33:57,396 INFO L226 Difference]: Without dead ends: 16019 [2021-08-12 19:33:57,400 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1089.9ms TimeCoverageRelationStatistics Valid=1551, Invalid=4769, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:33:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2021-08-12 19:33:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 13397. [2021-08-12 19:33:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13397 states, 13396 states have (on average 2.5326216781128696) internal successors, (33927), 13396 states have internal predecessors, (33927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 33927 transitions. [2021-08-12 19:33:59,686 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 33927 transitions. Word has length 36 [2021-08-12 19:33:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:59,687 INFO L482 AbstractCegarLoop]: Abstraction has 13397 states and 33927 transitions. [2021-08-12 19:33:59,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 33927 transitions. [2021-08-12 19:33:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:33:59,694 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:59,694 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:59,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-08-12 19:33:59,899 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1229623750, now seen corresponding path program 98 times [2021-08-12 19:33:59,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:59,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891974508] [2021-08-12 19:33:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:59,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891974508] [2021-08-12 19:33:59,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891974508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109270225] [2021-08-12 19:33:59,993 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:34:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:00,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109270225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:00,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:00,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-12 19:34:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041578925] [2021-08-12 19:34:00,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:34:00,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:34:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:34:00,284 INFO L87 Difference]: Start difference. First operand 13397 states and 33927 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:14,083 INFO L93 Difference]: Finished difference Result 17481 states and 43274 transitions. [2021-08-12 19:34:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-12 19:34:14,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:34:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:14,110 INFO L225 Difference]: With dead ends: 17481 [2021-08-12 19:34:14,111 INFO L226 Difference]: Without dead ends: 17440 [2021-08-12 19:34:14,114 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1190.5ms TimeCoverageRelationStatistics Valid=1619, Invalid=5187, Unknown=0, NotChecked=0, Total=6806 [2021-08-12 19:34:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17440 states. [2021-08-12 19:34:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17440 to 15583. [2021-08-12 19:34:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 15582 states have (on average 2.5360672570915157) internal successors, (39517), 15582 states have internal predecessors, (39517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 39517 transitions. [2021-08-12 19:34:16,858 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 39517 transitions. Word has length 36 [2021-08-12 19:34:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:16,859 INFO L482 AbstractCegarLoop]: Abstraction has 15583 states and 39517 transitions. [2021-08-12 19:34:16,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 39517 transitions. [2021-08-12 19:34:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:34:16,867 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:16,867 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:17,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:17,067 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1433554762, now seen corresponding path program 99 times [2021-08-12 19:34:17,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:17,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480416989] [2021-08-12 19:34:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:34:17,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480416989] [2021-08-12 19:34:17,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480416989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184634089] [2021-08-12 19:34:17,172 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:17,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:34:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:34:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:17,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184634089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:17,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:17,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:34:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602749644] [2021-08-12 19:34:17,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:34:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:34:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:34:17,440 INFO L87 Difference]: Start difference. First operand 15583 states and 39517 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:33,075 INFO L93 Difference]: Finished difference Result 20039 states and 49595 transitions. [2021-08-12 19:34:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:34:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:34:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:33,109 INFO L225 Difference]: With dead ends: 20039 [2021-08-12 19:34:33,109 INFO L226 Difference]: Without dead ends: 19990 [2021-08-12 19:34:33,113 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1274.6ms TimeCoverageRelationStatistics Valid=1799, Invalid=5857, Unknown=0, NotChecked=0, Total=7656 [2021-08-12 19:34:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2021-08-12 19:34:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 17983. [2021-08-12 19:34:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17983 states, 17982 states have (on average 2.533644755866978) internal successors, (45560), 17982 states have internal predecessors, (45560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 45560 transitions. [2021-08-12 19:34:36,268 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 45560 transitions. Word has length 36 [2021-08-12 19:34:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:36,268 INFO L482 AbstractCegarLoop]: Abstraction has 17983 states and 45560 transitions. [2021-08-12 19:34:36,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 45560 transitions. [2021-08-12 19:34:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:34:36,280 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:36,280 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:36,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-08-12 19:34:36,480 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash 157238322, now seen corresponding path program 100 times [2021-08-12 19:34:36,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:36,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826295977] [2021-08-12 19:34:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:36,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826295977] [2021-08-12 19:34:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826295977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787436085] [2021-08-12 19:34:36,682 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:36,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:34:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787436085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-12 19:34:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370518782] [2021-08-12 19:34:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:34:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:34:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:34:36,955 INFO L87 Difference]: Start difference. First operand 17983 states and 45560 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:52,014 INFO L93 Difference]: Finished difference Result 19970 states and 49678 transitions. [2021-08-12 19:34:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-12 19:34:52,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2021-08-12 19:34:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:52,055 INFO L225 Difference]: With dead ends: 19970 [2021-08-12 19:34:52,055 INFO L226 Difference]: Without dead ends: 19913 [2021-08-12 19:34:52,060 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 1496.0ms TimeCoverageRelationStatistics Valid=2089, Invalid=6841, Unknown=0, NotChecked=0, Total=8930 [2021-08-12 19:34:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19913 states. [2021-08-12 19:34:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19913 to 18106. [2021-08-12 19:34:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18106 states, 18105 states have (on average 2.5389671361502346) internal successors, (45968), 18105 states have internal predecessors, (45968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 45968 transitions. [2021-08-12 19:34:55,182 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 45968 transitions. Word has length 36 [2021-08-12 19:34:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:55,183 INFO L482 AbstractCegarLoop]: Abstraction has 18106 states and 45968 transitions. [2021-08-12 19:34:55,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 45968 transitions. [2021-08-12 19:34:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 19:34:55,193 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:55,193 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:55,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:55,397 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -380198988, now seen corresponding path program 101 times [2021-08-12 19:34:55,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:55,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512231134] [2021-08-12 19:34:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:55,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:55,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512231134] [2021-08-12 19:34:55,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512231134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:55,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999015603] [2021-08-12 19:34:55,442 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:55,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:34:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:34:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:55,722 INFO L354 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2021-08-12 19:34:55,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 163 treesize of output 143 [2021-08-12 19:34:56,297 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-08-12 19:34:56,578 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:34:56,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:57,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:34:57,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:163, output treesize:285 [2021-08-12 19:34:57,751 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2021-08-12 19:34:57,930 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2021-08-12 19:34:59,721 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2021-08-12 19:34:59,897 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2021-08-12 19:35:00,098 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2021-08-12 19:35:02,637 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 324 DAG size of output: 48 [2021-08-12 19:35:02,961 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-08-12 19:35:02,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 76 [2021-08-12 19:35:02,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,078 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 85 [2021-08-12 19:35:03,078 INFO L628 ElimStorePlain]: treesize reduction 440, result has 43.3 percent of original size [2021-08-12 19:35:03,119 INFO L354 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2021-08-12 19:35:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 55 [2021-08-12 19:35:03,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:03,186 INFO L354 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2021-08-12 19:35:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 41 [2021-08-12 19:35:03,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:03,248 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-08-12 19:35:03,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 40 [2021-08-12 19:35:03,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:03,312 INFO L354 Elim1Store]: treesize reduction 103, result has 14.9 percent of original size [2021-08-12 19:35:03,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 46 [2021-08-12 19:35:03,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:03,405 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-08-12 19:35:03,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 102 [2021-08-12 19:35:03,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,418 INFO L628 ElimStorePlain]: treesize reduction 38, result has 7.3 percent of original size [2021-08-12 19:35:03,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:03,419 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:920, output treesize:3 [2021-08-12 19:35:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:03,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999015603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:03,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:03,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2021-08-12 19:35:03,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162329041] [2021-08-12 19:35:03,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:35:03,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:35:03,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:35:03,425 INFO L87 Difference]: Start difference. First operand 18106 states and 45968 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:14,615 INFO L93 Difference]: Finished difference Result 20300 states and 51397 transitions. [2021-08-12 19:35:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:35:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 38 [2021-08-12 19:35:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:14,652 INFO L225 Difference]: With dead ends: 20300 [2021-08-12 19:35:14,652 INFO L226 Difference]: Without dead ends: 20291 [2021-08-12 19:35:14,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3920.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:35:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20291 states. [2021-08-12 19:35:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20291 to 19572. [2021-08-12 19:35:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19572 states, 19571 states have (on average 2.545552092381585) internal successors, (49819), 19571 states have internal predecessors, (49819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19572 states to 19572 states and 49819 transitions. [2021-08-12 19:35:18,606 INFO L78 Accepts]: Start accepts. Automaton has 19572 states and 49819 transitions. Word has length 38 [2021-08-12 19:35:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:18,606 INFO L482 AbstractCegarLoop]: Abstraction has 19572 states and 49819 transitions. [2021-08-12 19:35:18,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19572 states and 49819 transitions. [2021-08-12 19:35:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 19:35:18,617 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:18,617 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:18,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-08-12 19:35:18,829 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1616439732, now seen corresponding path program 102 times [2021-08-12 19:35:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:18,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960247970] [2021-08-12 19:35:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:35:18,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:18,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960247970] [2021-08-12 19:35:18,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960247970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:18,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603639368] [2021-08-12 19:35:18,872 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:18,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:35:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:35:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:19,167 INFO L446 ElimStorePlain]: Different costs {15=[f], 55=[f_inv]} [2021-08-12 19:35:19,230 INFO L354 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2021-08-12 19:35:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 201 treesize of output 158 [2021-08-12 19:35:20,135 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-08-12 19:35:21,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:35:21,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:21,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 307 treesize of output 214 [2021-08-12 19:35:21,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:21,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:21,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:21,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:201, output treesize:3 [2021-08-12 19:35:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:35:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603639368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:21,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:21,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2021-08-12 19:35:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802487924] [2021-08-12 19:35:21,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:35:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:35:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:35:21,406 INFO L87 Difference]: Start difference. First operand 19572 states and 49819 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 19:35:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:35:29,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1616,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:29,847 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:35:29,849 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:35:29,851 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:35:29,852 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:35:29 BasicIcfg [2021-08-12 19:35:29,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:35:29,853 INFO L168 Benchmark]: Toolchain (without parser) took 545251.43 ms. Allocated memory was 192.9 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 172.6 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 343.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 192.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 192.9 MB. Free memory was 172.5 MB in the beginning and 171.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 INFO L168 Benchmark]: Boogie Preprocessor took 11.01 ms. Allocated memory is still 192.9 MB. Free memory was 171.0 MB in the beginning and 170.1 MB in the end (delta: 902.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 INFO L168 Benchmark]: RCFGBuilder took 241.55 ms. Allocated memory is still 192.9 MB. Free memory was 170.0 MB in the beginning and 158.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 INFO L168 Benchmark]: TraceAbstraction took 544971.69 ms. Allocated memory was 192.9 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 157.5 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 328.4 MB. Max. memory is 8.0 GB. [2021-08-12 19:35:29,853 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 0.18 ms. Allocated memory is still 192.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 192.9 MB. Free memory was 172.5 MB in the beginning and 171.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.01 ms. Allocated memory is still 192.9 MB. Free memory was 171.0 MB in the beginning and 170.1 MB in the end (delta: 902.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 241.55 ms. Allocated memory is still 192.9 MB. Free memory was 170.0 MB in the beginning and 158.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 544971.69 ms. Allocated memory was 192.9 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 157.5 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 328.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (19572states) and FLOYD_HOARE automaton (currently 15 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (12163 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 544900.0ms, OverallIterations: 107, TraceHistogramMax: 6, EmptinessCheckTime: 358.9ms, AutomataDifference: 409907.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4008 SDtfs, 25028 SDslu, 30327 SDs, 0 SdLazy, 37507 SolverSat, 5883 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18562.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7597 GetRequests, 2341 SyntacticMatches, 15 SemanticMatches, 5241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117535 ImplicationChecksByTransitivity, 78022.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19572occurred in iteration=106, InterpolantAutomatonStates: 4127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 67200.3ms AutomataMinimizationTime, 106 MinimizatonAttempts, 103198 StatesRemovedByMinimization, 106 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 350.8ms SsaConstructionTime, 1400.6ms SatisfiabilityAnalysisTime, 41727.1ms InterpolantComputationTime, 6148 NumberOfCodeBlocks, 6148 NumberOfCodeBlocksAsserted, 480 NumberOfCheckSat, 5939 ConstructedInterpolants, 56 QuantifiedInterpolants, 59640 SizeOfPredicates, 366 NumberOfNonLiveVariables, 8477 ConjunctsInSsa, 1554 ConjunctsInUnsatCore, 209 InterpolantComputations, 5 PerfectInterpolantSequences, 2539/7171 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown