/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/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:53:25,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:53:25,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:53:25,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:53:25,857 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 [2021-06-12 20:53:25,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:53:25,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:53:25,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:53:25,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:53:25,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:53:25,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:53:25,878 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:53:25,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:53:25,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:53:25,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:53:25,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:53:25,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:53:25,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:53:25,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:53:25,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:53:25,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:53:25,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:53:25,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:53:25,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:53:25,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:53:26,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:53:26,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:53:26,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:53:26,194 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:53:26,196 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:53:26,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-06-12 20:53:26,196 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-06-12 20:53:26,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:53:26,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:53:26,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:53:26,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:53:26,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:53:26,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:53:26,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:53:26,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:53:26,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:53:26,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/1) ... [2021-06-12 20:53:26,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:53:26,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:53:26,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:53:26,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:53:26,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (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 [2021-06-12 20:53:26,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:53:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:53:26,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:53:26,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:53:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:53:26,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:53:26,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:53:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:53:26,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:53:26,340 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:53:26,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:53:26,534 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:53:26,536 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:53:26 BoogieIcfgContainer [2021-06-12 20:53:26,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:53:26,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:53:26,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:53:26,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:53:26,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:26" (1/2) ... [2021-06-12 20:53:26,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb124d9 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:53:26, skipping insertion in model container [2021-06-12 20:53:26,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:53:26" (2/2) ... [2021-06-12 20:53:26,541 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-06-12 20:53:26,547 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:53:26,548 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:53:26,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:53:26,548 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:53:26,577 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:53:26,598 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:53:26,625 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:53:26,625 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:53:26,626 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:53:26,626 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:53:26,626 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:53:26,626 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:53:26,626 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:53:26,626 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:53:26,634 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-12 20:53:26,642 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:53:26,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:26,649 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:26,649 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-06-12 20:53:26,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:26,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975089094] [2021-06-12 20:53:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:26,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:26,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975089094] [2021-06-12 20:53:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975089094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:53:26,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:53:26,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:53:26,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855016774] [2021-06-12 20:53:26,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:53:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:26,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:53:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:53:26,785 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:26,810 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-06-12 20:53:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:53:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:53:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:26,832 INFO L225 Difference]: With dead ends: 58 [2021-06-12 20:53:26,832 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 20:53:26,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:53:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 20:53:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-06-12 20:53:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-06-12 20:53:26,859 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-06-12 20:53:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:26,859 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-06-12 20:53:26,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-06-12 20:53:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:53:26,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:26,861 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:26,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:53:26,861 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-06-12 20:53:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:26,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921192652] [2021-06-12 20:53:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:26,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921192652] [2021-06-12 20:53:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921192652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225323974] [2021-06-12 20:53:26,958 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 [2021-06-12 20:53:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:53:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225323974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:27,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:27,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-12 20:53:27,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36810203] [2021-06-12 20:53:27,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:53:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:53:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:27,117 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-06-12 20:53:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:27,233 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-06-12 20:53:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:53:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 17 [2021-06-12 20:53:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:27,235 INFO L225 Difference]: With dead ends: 64 [2021-06-12 20:53:27,235 INFO L226 Difference]: Without dead ends: 64 [2021-06-12 20:53:27,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:53:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-12 20:53:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-06-12 20:53:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-06-12 20:53:27,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-06-12 20:53:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:27,244 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-06-12 20:53:27,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-06-12 20:53:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-06-12 20:53:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:53:27,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:27,245 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:27,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 20:53:27,469 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-06-12 20:53:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:27,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876219809] [2021-06-12 20:53:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876219809] [2021-06-12 20:53:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876219809] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:53:27,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:53:27,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:53:27,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286675709] [2021-06-12 20:53:27,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:53:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:53:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:27,542 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:27,616 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-06-12 20:53:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:53:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-06-12 20:53:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:27,621 INFO L225 Difference]: With dead ends: 51 [2021-06-12 20:53:27,625 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 20:53:27,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 20:53:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-06-12 20:53:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-06-12 20:53:27,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-06-12 20:53:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:27,630 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-06-12 20:53:27,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-06-12 20:53:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:27,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:27,632 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:27,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:53:27,632 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-06-12 20:53:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:27,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233319687] [2021-06-12 20:53:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:27,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233319687] [2021-06-12 20:53:27,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233319687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:27,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152103014] [2021-06-12 20:53:27,730 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 [2021-06-12 20:53:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152103014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:27,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:27,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:53:27,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042866997] [2021-06-12 20:53:27,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:53:27,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:27,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:53:27,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:53:27,871 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:27,888 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-06-12 20:53:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:53:27,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-06-12 20:53:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:27,891 INFO L225 Difference]: With dead ends: 97 [2021-06-12 20:53:27,892 INFO L226 Difference]: Without dead ends: 76 [2021-06-12 20:53:27,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:53:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-12 20:53:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-12 20:53:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-06-12 20:53:27,910 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-06-12 20:53:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:27,910 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-06-12 20:53:27,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-06-12 20:53:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:27,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:27,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:28,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:28,133 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:28,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-06-12 20:53:28,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:28,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178762217] [2021-06-12 20:53:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:28,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178762217] [2021-06-12 20:53:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178762217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450904086] [2021-06-12 20:53:28,238 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 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 [2021-06-12 20:53:28,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:28,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:28,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450904086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:28,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:28,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 20:53:28,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763910215] [2021-06-12 20:53:28,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:53:28,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:53:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:53:28,419 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-12 20:53:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:28,778 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-06-12 20:53:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:53:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 21 [2021-06-12 20:53:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:28,780 INFO L225 Difference]: With dead ends: 174 [2021-06-12 20:53:28,780 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 20:53:28,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:53:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 20:53:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-06-12 20:53:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-06-12 20:53:28,801 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-06-12 20:53:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:28,801 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-06-12 20:53:28,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-12 20:53:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-06-12 20:53:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:28,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:28,803 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:29,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:29,003 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-06-12 20:53:29,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:29,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156838769] [2021-06-12 20:53:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:29,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156838769] [2021-06-12 20:53:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156838769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947723278] [2021-06-12 20:53:29,087 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 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 [2021-06-12 20:53:29,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:53:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:29,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947723278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:29,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:29,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 20:53:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332885683] [2021-06-12 20:53:29,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:53:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:53:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:53:29,263 INFO L87 Difference]: Start difference. First operand 68 states and 130 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) [2021-06-12 20:53:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:29,539 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-06-12 20:53:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:53:29,540 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 21 [2021-06-12 20:53:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:29,541 INFO L225 Difference]: With dead ends: 146 [2021-06-12 20:53:29,541 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 20:53:29,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:53:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 20:53:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-06-12 20:53:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-06-12 20:53:29,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-06-12 20:53:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:29,549 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-06-12 20:53:29,549 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) [2021-06-12 20:53:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-06-12 20:53:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:53:29,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:29,550 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:29,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:29,753 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-06-12 20:53:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:29,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115528777] [2021-06-12 20:53:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:29,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115528777] [2021-06-12 20:53:29,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115528777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487466043] [2021-06-12 20:53:29,810 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 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 [2021-06-12 20:53:29,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:29,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:29,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487466043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:29,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:29,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:53:29,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613485821] [2021-06-12 20:53:29,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:53:29,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:53:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:53:29,901 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:29,922 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-06-12 20:53:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:53:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-12 20:53:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:29,924 INFO L225 Difference]: With dead ends: 163 [2021-06-12 20:53:29,924 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 20:53:29,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:53:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 20:53:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-06-12 20:53:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-12 20:53:29,934 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-06-12 20:53:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:29,935 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-12 20:53:29,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-12 20:53:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:53:29,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:29,939 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:30,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 20:53:30,155 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-06-12 20:53:30,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:30,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744554032] [2021-06-12 20:53:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:30,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744554032] [2021-06-12 20:53:30,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744554032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461241689] [2021-06-12 20:53:30,264 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 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 [2021-06-12 20:53:30,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:53:30,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:53:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461241689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:30,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:30,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:53:30,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731553616] [2021-06-12 20:53:30,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:53:30,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:53:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:53:30,465 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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) [2021-06-12 20:53:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:30,946 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-06-12 20:53:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:53:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 25 [2021-06-12 20:53:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:30,948 INFO L225 Difference]: With dead ends: 365 [2021-06-12 20:53:30,948 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 20:53:30,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:53:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 20:53:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-06-12 20:53:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-06-12 20:53:30,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-06-12 20:53:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:30,953 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-06-12 20:53:30,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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) [2021-06-12 20:53:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-06-12 20:53:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:53:30,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:30,954 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:31,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:31,177 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:31,178 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-06-12 20:53:31,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:31,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010199840] [2021-06-12 20:53:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:31,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:31,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010199840] [2021-06-12 20:53:31,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010199840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:31,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161670411] [2021-06-12 20:53:31,240 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 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 [2021-06-12 20:53:31,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:53:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:53:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:31,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161670411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:31,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:31,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 20:53:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353359550] [2021-06-12 20:53:31,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:53:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:53:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:53:31,455 INFO L87 Difference]: Start difference. First operand 93 states and 180 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) [2021-06-12 20:53:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:31,952 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-06-12 20:53:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:31,952 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 25 [2021-06-12 20:53:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:31,953 INFO L225 Difference]: With dead ends: 240 [2021-06-12 20:53:31,953 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 20:53:31,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:53:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 20:53:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-06-12 20:53:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-06-12 20:53:31,957 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-06-12 20:53:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:31,957 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-06-12 20:53:31,958 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) [2021-06-12 20:53:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-06-12 20:53:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:53:31,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:31,958 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:32,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:32,181 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-06-12 20:53:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:32,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887442782] [2021-06-12 20:53:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887442782] [2021-06-12 20:53:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887442782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176500661] [2021-06-12 20:53:32,235 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 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 [2021-06-12 20:53:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176500661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:53:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195667629] [2021-06-12 20:53:32,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:53:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:53:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:32,332 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:32,364 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-06-12 20:53:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:53:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:53:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:32,365 INFO L225 Difference]: With dead ends: 222 [2021-06-12 20:53:32,365 INFO L226 Difference]: Without dead ends: 189 [2021-06-12 20:53:32,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-12 20:53:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-06-12 20:53:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-06-12 20:53:32,370 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-06-12 20:53:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:32,370 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-06-12 20:53:32,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-06-12 20:53:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:53:32,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:32,371 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:32,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:53:32,585 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-06-12 20:53:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226167005] [2021-06-12 20:53:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226167005] [2021-06-12 20:53:32,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226167005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433047466] [2021-06-12 20:53:32,701 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 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 [2021-06-12 20:53:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433047466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:32,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 20:53:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219815987] [2021-06-12 20:53:32,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:53:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:53:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:53:32,942 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-12 20:53:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:33,779 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-06-12 20:53:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:53:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:53:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:33,787 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:53:33,787 INFO L226 Difference]: Without dead ends: 496 [2021-06-12 20:53:33,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 723.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:53:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-12 20:53:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-06-12 20:53:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-06-12 20:53:33,793 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-06-12 20:53:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:33,794 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-06-12 20:53:33,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-12 20:53:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-06-12 20:53:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:53:33,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:33,794 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:34,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:34,005 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-06-12 20:53:34,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:34,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797649410] [2021-06-12 20:53:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:34,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:34,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797649410] [2021-06-12 20:53:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797649410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111956090] [2021-06-12 20:53:34,065 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 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 [2021-06-12 20:53:34,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:53:34,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:34,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111956090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:34,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:34,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 20:53:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352793456] [2021-06-12 20:53:34,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:53:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:34,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:53:34,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:53:34,290 INFO L87 Difference]: Start difference. First operand 115 states and 226 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) [2021-06-12 20:53:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:34,988 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-06-12 20:53:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:53:34,989 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 29 [2021-06-12 20:53:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:34,990 INFO L225 Difference]: With dead ends: 352 [2021-06-12 20:53:34,990 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:53:34,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:53:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:53:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-06-12 20:53:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-06-12 20:53:34,997 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-06-12 20:53:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:34,997 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-06-12 20:53:34,997 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) [2021-06-12 20:53:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-06-12 20:53:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:53:34,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:34,998 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:35,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:35,209 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-06-12 20:53:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:35,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542538226] [2021-06-12 20:53:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:35,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:35,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542538226] [2021-06-12 20:53:35,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542538226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:35,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737760849] [2021-06-12 20:53:35,277 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 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 [2021-06-12 20:53:35,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737760849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:35,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:35,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:53:35,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194032239] [2021-06-12 20:53:35,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:53:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:53:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:53:35,401 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:35,445 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-06-12 20:53:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:53:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-12 20:53:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:35,447 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:53:35,447 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 20:53:35,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:53:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 20:53:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-06-12 20:53:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-06-12 20:53:35,455 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-06-12 20:53:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-06-12 20:53:35,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-06-12 20:53:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:53:35,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:35,456 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:35,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 20:53:35,665 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-06-12 20:53:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:35,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937302975] [2021-06-12 20:53:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:35,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937302975] [2021-06-12 20:53:35,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937302975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773504220] [2021-06-12 20:53:35,797 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 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 [2021-06-12 20:53:35,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:53:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:35,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:36,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773504220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:36,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:36,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 20:53:36,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206340492] [2021-06-12 20:53:36,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:53:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:53:36,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:53:36,091 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:37,314 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-06-12 20:53:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:53:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 33 [2021-06-12 20:53:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:37,319 INFO L225 Difference]: With dead ends: 787 [2021-06-12 20:53:37,319 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 20:53:37,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1068.0ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:53:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 20:53:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-06-12 20:53:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-06-12 20:53:37,328 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-06-12 20:53:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:37,328 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-06-12 20:53:37,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-06-12 20:53:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:53:37,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:37,329 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:37,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:53:37,553 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-06-12 20:53:37,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:37,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662022195] [2021-06-12 20:53:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:37,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:37,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662022195] [2021-06-12 20:53:37,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662022195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:37,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128770429] [2021-06-12 20:53:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:37,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:53:37,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:37,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128770429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:37,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:37,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 20:53:37,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269014712] [2021-06-12 20:53:37,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:37,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:37,903 INFO L87 Difference]: Start difference. First operand 137 states and 272 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) [2021-06-12 20:53:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:38,861 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-06-12 20:53:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:53:38,867 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 33 [2021-06-12 20:53:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:38,869 INFO L225 Difference]: With dead ends: 486 [2021-06-12 20:53:38,869 INFO L226 Difference]: Without dead ends: 482 [2021-06-12 20:53:38,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 898.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:53:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-12 20:53:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-06-12 20:53:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-06-12 20:53:38,876 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-06-12 20:53:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:38,876 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-06-12 20:53:38,876 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) [2021-06-12 20:53:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-06-12 20:53:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:53:38,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:38,876 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:39,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:53:39,090 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:39,090 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-06-12 20:53:39,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:39,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132040119] [2021-06-12 20:53:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:39,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132040119] [2021-06-12 20:53:39,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132040119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139486440] [2021-06-12 20:53:39,175 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 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 [2021-06-12 20:53:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:53:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139486440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:53:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728554467] [2021-06-12 20:53:39,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:53:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:39,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:53:39,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:53:39,257 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:39,315 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-06-12 20:53:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:53:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-06-12 20:53:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:39,318 INFO L225 Difference]: With dead ends: 340 [2021-06-12 20:53:39,318 INFO L226 Difference]: Without dead ends: 295 [2021-06-12 20:53:39,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:53:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-12 20:53:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-06-12 20:53:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-06-12 20:53:39,326 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-06-12 20:53:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:39,327 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-06-12 20:53:39,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-06-12 20:53:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:53:39,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:39,328 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:39,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:39,552 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-06-12 20:53:39,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:39,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399585481] [2021-06-12 20:53:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:39,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399585481] [2021-06-12 20:53:39,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399585481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246937020] [2021-06-12 20:53:39,698 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 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 [2021-06-12 20:53:39,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:39,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:39,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:40,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246937020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:40,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:40,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 20:53:40,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375252947] [2021-06-12 20:53:40,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:53:40,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:40,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:53:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:53:40,010 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:41,649 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-06-12 20:53:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:53:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 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 37 [2021-06-12 20:53:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:41,652 INFO L225 Difference]: With dead ends: 1040 [2021-06-12 20:53:41,652 INFO L226 Difference]: Without dead ends: 884 [2021-06-12 20:53:41,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1405.1ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:53:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-12 20:53:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-06-12 20:53:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-06-12 20:53:41,662 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-06-12 20:53:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:41,662 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-06-12 20:53:41,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-06-12 20:53:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:53:41,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:41,663 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:53:41,877 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-06-12 20:53:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054049904] [2021-06-12 20:53:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:41,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:41,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054049904] [2021-06-12 20:53:41,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054049904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:41,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230168187] [2021-06-12 20:53:41,963 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 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 [2021-06-12 20:53:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:53:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:42,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230168187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:42,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:42,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-06-12 20:53:42,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586007366] [2021-06-12 20:53:42,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:53:42,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:53:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:53:42,244 INFO L87 Difference]: Start difference. First operand 159 states and 318 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) [2021-06-12 20:53:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:43,593 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-06-12 20:53:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:53:43,594 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 37 [2021-06-12 20:53:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:43,596 INFO L225 Difference]: With dead ends: 642 [2021-06-12 20:53:43,596 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 20:53:43,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1269.6ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:53:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 20:53:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-06-12 20:53:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-06-12 20:53:43,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-06-12 20:53:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:43,603 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-06-12 20:53:43,604 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) [2021-06-12 20:53:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-06-12 20:53:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:53:43,604 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:43,604 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:43,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:53:43,821 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-06-12 20:53:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:43,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986266036] [2021-06-12 20:53:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:43,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986266036] [2021-06-12 20:53:43,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986266036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405807774] [2021-06-12 20:53:43,900 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 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 [2021-06-12 20:53:43,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:53:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:43,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405807774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:43,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:43,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:53:43,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043750161] [2021-06-12 20:53:43,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:53:43,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:53:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:53:44,000 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-06-12 20:53:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:44,064 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-06-12 20:53:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:53:44,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 39 [2021-06-12 20:53:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:44,065 INFO L225 Difference]: With dead ends: 399 [2021-06-12 20:53:44,065 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:53:44,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:53:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:53:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-06-12 20:53:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-06-12 20:53:44,072 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-06-12 20:53:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:44,072 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-06-12 20:53:44,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-06-12 20:53:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-06-12 20:53:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:53:44,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:44,073 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:44,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:44,293 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-06-12 20:53:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20264406] [2021-06-12 20:53:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:44,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20264406] [2021-06-12 20:53:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20264406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389684729] [2021-06-12 20:53:44,456 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 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 [2021-06-12 20:53:44,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:53:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:44,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389684729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:44,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:44,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-12 20:53:44,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375061818] [2021-06-12 20:53:44,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 20:53:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 20:53:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:53:44,813 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-06-12 20:53:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:46,918 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-06-12 20:53:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 20:53:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) Word has length 41 [2021-06-12 20:53:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:46,921 INFO L225 Difference]: With dead ends: 1321 [2021-06-12 20:53:46,921 INFO L226 Difference]: Without dead ends: 1111 [2021-06-12 20:53:46,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1843.5ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 20:53:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-12 20:53:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-06-12 20:53:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-06-12 20:53:46,932 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-06-12 20:53:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:46,932 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-06-12 20:53:46,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-06-12 20:53:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-06-12 20:53:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:53:46,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:46,933 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:47,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:47,148 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-06-12 20:53:47,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:47,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482912081] [2021-06-12 20:53:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:47,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:47,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482912081] [2021-06-12 20:53:47,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482912081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:47,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146804343] [2021-06-12 20:53:47,266 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 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 [2021-06-12 20:53:47,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:53:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146804343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:47,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:47,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-06-12 20:53:47,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001207895] [2021-06-12 20:53:47,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:53:47,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:47,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:53:47,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:53:47,615 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:49,398 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-06-12 20:53:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:53:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-06-12 20:53:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:49,400 INFO L225 Difference]: With dead ends: 820 [2021-06-12 20:53:49,400 INFO L226 Difference]: Without dead ends: 816 [2021-06-12 20:53:49,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1687.2ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 20:53:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-12 20:53:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-06-12 20:53:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-06-12 20:53:49,409 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-06-12 20:53:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:49,409 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-06-12 20:53:49,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-06-12 20:53:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:53:49,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:49,410 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:49,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:49,625 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-06-12 20:53:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:49,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065334138] [2021-06-12 20:53:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:49,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:49,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065334138] [2021-06-12 20:53:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065334138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:49,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060192812] [2021-06-12 20:53:49,715 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 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 [2021-06-12 20:53:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:53:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:49,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060192812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:49,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:49,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:53:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185059982] [2021-06-12 20:53:49,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:53:49,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:53:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:49,833 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:49,922 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-06-12 20:53:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:53:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-06-12 20:53:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:49,923 INFO L225 Difference]: With dead ends: 458 [2021-06-12 20:53:49,923 INFO L226 Difference]: Without dead ends: 401 [2021-06-12 20:53:49,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-12 20:53:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-06-12 20:53:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-06-12 20:53:49,931 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-06-12 20:53:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:49,932 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-06-12 20:53:49,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-06-12 20:53:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:53:49,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:49,932 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:50,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 20:53:50,149 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-06-12 20:53:50,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:50,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079250547] [2021-06-12 20:53:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:50,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:50,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079250547] [2021-06-12 20:53:50,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079250547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:50,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404446651] [2021-06-12 20:53:50,347 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 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 [2021-06-12 20:53:50,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:50,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404446651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:50,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:50,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-12 20:53:50,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008889832] [2021-06-12 20:53:50,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 20:53:50,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:50,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 20:53:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:53:50,779 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:53,296 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-06-12 20:53:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-12 20:53:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 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 45 [2021-06-12 20:53:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:53,300 INFO L225 Difference]: With dead ends: 1630 [2021-06-12 20:53:53,300 INFO L226 Difference]: Without dead ends: 1360 [2021-06-12 20:53:53,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2332.0ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-06-12 20:53:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-06-12 20:53:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-06-12 20:53:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-06-12 20:53:53,309 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-06-12 20:53:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:53,309 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-06-12 20:53:53,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-06-12 20:53:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:53:53,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:53,310 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:53,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:53:53,525 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-06-12 20:53:53,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:53,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335005303] [2021-06-12 20:53:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:53,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:53,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335005303] [2021-06-12 20:53:53,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335005303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:53,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794326601] [2021-06-12 20:53:53,635 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 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 [2021-06-12 20:53:53,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 20:53:53,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:54,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794326601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:54,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:54,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-06-12 20:53:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792817304] [2021-06-12 20:53:54,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:53:54,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:54,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:53:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:53:54,018 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:56,309 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-06-12 20:53:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 20:53:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 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 45 [2021-06-12 20:53:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:56,311 INFO L225 Difference]: With dead ends: 1020 [2021-06-12 20:53:56,311 INFO L226 Difference]: Without dead ends: 1016 [2021-06-12 20:53:56,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2160.8ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 20:53:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-12 20:53:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-06-12 20:53:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-06-12 20:53:56,317 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-06-12 20:53:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:56,317 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-06-12 20:53:56,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-06-12 20:53:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 20:53:56,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:56,318 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:56,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:56,541 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-06-12 20:53:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:56,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522807137] [2021-06-12 20:53:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:56,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522807137] [2021-06-12 20:53:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522807137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239623399] [2021-06-12 20:53:56,643 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 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 [2021-06-12 20:53:56,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:53:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239623399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:56,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:56,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:53:56,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6203587] [2021-06-12 20:53:56,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:53:56,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:53:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:53:56,754 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2021-06-12 20:53:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:56,855 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-06-12 20:53:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:53:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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 47 [2021-06-12 20:53:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:56,856 INFO L225 Difference]: With dead ends: 517 [2021-06-12 20:53:56,856 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 20:53:56,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:53:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 20:53:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-06-12 20:53:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-06-12 20:53:56,873 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-06-12 20:53:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:56,874 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-06-12 20:53:56,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2021-06-12 20:53:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-06-12 20:53:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 20:53:56,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:56,875 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:57,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:53:57,098 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-06-12 20:53:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:57,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013314259] [2021-06-12 20:53:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013314259] [2021-06-12 20:53:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013314259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797176137] [2021-06-12 20:53:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:57,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:53:57,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:57,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797176137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:57,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:57,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-12 20:53:57,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905207872] [2021-06-12 20:53:57,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 20:53:57,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 20:53:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:53:57,798 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:00,996 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-06-12 20:54:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-12 20:54:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 49 [2021-06-12 20:54:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:01,000 INFO L225 Difference]: With dead ends: 1967 [2021-06-12 20:54:01,000 INFO L226 Difference]: Without dead ends: 1631 [2021-06-12 20:54:01,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 2945.9ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-06-12 20:54:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-12 20:54:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-06-12 20:54:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-12 20:54:01,011 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-06-12 20:54:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:01,011 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-12 20:54:01,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-12 20:54:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 20:54:01,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:01,012 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:01,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:01,232 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-06-12 20:54:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:01,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923946761] [2021-06-12 20:54:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:01,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:01,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923946761] [2021-06-12 20:54:01,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923946761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:01,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326532390] [2021-06-12 20:54:01,351 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 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 [2021-06-12 20:54:01,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 20:54:01,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:54:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326532390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:01,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:01,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-12 20:54:01,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429569859] [2021-06-12 20:54:01,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 20:54:01,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:01,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 20:54:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:54:01,782 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:04,611 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-06-12 20:54:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-12 20:54:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 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 49 [2021-06-12 20:54:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:04,615 INFO L225 Difference]: With dead ends: 1242 [2021-06-12 20:54:04,615 INFO L226 Difference]: Without dead ends: 1238 [2021-06-12 20:54:04,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2706.7ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 20:54:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-12 20:54:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-06-12 20:54:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-06-12 20:54:04,622 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-06-12 20:54:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:04,622 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-06-12 20:54:04,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-06-12 20:54:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 20:54:04,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:04,623 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:04,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:54:04,845 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-06-12 20:54:04,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:04,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118442754] [2021-06-12 20:54:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:04,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118442754] [2021-06-12 20:54:04,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118442754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:04,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175536945] [2021-06-12 20:54:04,958 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 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 [2021-06-12 20:54:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:54:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:05,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175536945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:05,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:05,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:54:05,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979607414] [2021-06-12 20:54:05,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:54:05,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:05,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:54:05,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:54:05,075 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:05,201 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-06-12 20:54:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:54:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 20:54:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:05,202 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:54:05,202 INFO L226 Difference]: Without dead ends: 507 [2021-06-12 20:54:05,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:54:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-12 20:54:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-06-12 20:54:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 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) [2021-06-12 20:54:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-06-12 20:54:05,208 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-06-12 20:54:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:05,209 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-06-12 20:54:05,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-06-12 20:54:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 20:54:05,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:05,210 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:05,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:54:05,425 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-06-12 20:54:05,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:05,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239595877] [2021-06-12 20:54:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:05,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:05,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239595877] [2021-06-12 20:54:05,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239595877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:05,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608267078] [2021-06-12 20:54:05,650 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 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 [2021-06-12 20:54:05,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:54:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:54:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608267078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:06,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:06,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-12 20:54:06,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346324851] [2021-06-12 20:54:06,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 20:54:06,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 20:54:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:54:06,161 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:10,293 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-06-12 20:54:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-12 20:54:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 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 53 [2021-06-12 20:54:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:10,298 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 20:54:10,298 INFO L226 Difference]: Without dead ends: 1924 [2021-06-12 20:54:10,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3698.4ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-06-12 20:54:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-06-12 20:54:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-06-12 20:54:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-06-12 20:54:10,308 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-06-12 20:54:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:10,308 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-06-12 20:54:10,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-06-12 20:54:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 20:54:10,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:10,309 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:10,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:54:10,525 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-06-12 20:54:10,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:10,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209684909] [2021-06-12 20:54:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:10,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:10,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209684909] [2021-06-12 20:54:10,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209684909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:10,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975129757] [2021-06-12 20:54:10,662 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 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 [2021-06-12 20:54:10,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 20:54:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:54:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975129757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:11,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:11,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-06-12 20:54:11,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186191093] [2021-06-12 20:54:11,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:54:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:54:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:54:11,220 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:14,863 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-06-12 20:54:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-12 20:54:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 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 53 [2021-06-12 20:54:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:14,867 INFO L225 Difference]: With dead ends: 1486 [2021-06-12 20:54:14,867 INFO L226 Difference]: Without dead ends: 1482 [2021-06-12 20:54:14,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3443.3ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-06-12 20:54:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-12 20:54:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-06-12 20:54:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-06-12 20:54:14,875 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-06-12 20:54:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:14,875 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-06-12 20:54:14,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-06-12 20:54:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 20:54:14,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:14,876 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:15,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:15,083 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-06-12 20:54:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636244297] [2021-06-12 20:54:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:15,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636244297] [2021-06-12 20:54:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636244297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913969054] [2021-06-12 20:54:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:54:15,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:54:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:54:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:15,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913969054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:15,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:15,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:54:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534405541] [2021-06-12 20:54:15,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:54:15,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:54:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:54:15,348 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-06-12 20:54:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:15,493 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-06-12 20:54:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:54:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 55 [2021-06-12 20:54:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:15,495 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:54:15,495 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 20:54:15,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:54:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 20:54:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-06-12 20:54:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-06-12 20:54:15,502 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-06-12 20:54:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:15,502 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-06-12 20:54:15,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-06-12 20:54:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-06-12 20:54:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 20:54:15,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:15,503 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:15,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:54:15,721 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-06-12 20:54:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:15,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145010745] [2021-06-12 20:54:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:16,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:16,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145010745] [2021-06-12 20:54:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145010745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:16,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265772253] [2021-06-12 20:54:16,045 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 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 [2021-06-12 20:54:16,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 20:54:16,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:54:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265772253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:16,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:16,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-12 20:54:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510821067] [2021-06-12 20:54:16,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 20:54:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 20:54:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:54:16,728 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:21,856 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-06-12 20:54:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-12 20:54:21,856 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 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 57 [2021-06-12 20:54:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:21,862 INFO L225 Difference]: With dead ends: 2725 [2021-06-12 20:54:21,863 INFO L226 Difference]: Without dead ends: 2239 [2021-06-12 20:54:21,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4691.1ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-06-12 20:54:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-06-12 20:54:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-06-12 20:54:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-06-12 20:54:21,876 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-06-12 20:54:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:21,877 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-06-12 20:54:21,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-06-12 20:54:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 20:54:21,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:21,878 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:22,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:22,093 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-06-12 20:54:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:22,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301551277] [2021-06-12 20:54:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:22,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:22,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301551277] [2021-06-12 20:54:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301551277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791324598] [2021-06-12 20:54:22,255 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 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 [2021-06-12 20:54:22,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 20:54:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:54:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:22,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791324598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:22,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:22,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-06-12 20:54:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533781059] [2021-06-12 20:54:22,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 20:54:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 20:54:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:54:22,913 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:27,404 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-06-12 20:54:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-12 20:54:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 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 57 [2021-06-12 20:54:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:27,409 INFO L225 Difference]: With dead ends: 1752 [2021-06-12 20:54:27,409 INFO L226 Difference]: Without dead ends: 1748 [2021-06-12 20:54:27,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 4299.0ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-06-12 20:54:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-12 20:54:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-06-12 20:54:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-06-12 20:54:27,418 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-06-12 20:54:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:27,418 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-06-12 20:54:27,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-06-12 20:54:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 20:54:27,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:27,419 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:27,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 20:54:27,619 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:27,620 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-06-12 20:54:27,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:27,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939353591] [2021-06-12 20:54:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:27,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:27,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939353591] [2021-06-12 20:54:27,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939353591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:27,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717656622] [2021-06-12 20:54:27,769 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 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 [2021-06-12 20:54:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:54:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717656622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:27,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:27,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 20:54:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425234405] [2021-06-12 20:54:27,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:54:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:54:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:54:27,906 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:28,130 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-06-12 20:54:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:54:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-06-12 20:54:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:28,140 INFO L225 Difference]: With dead ends: 694 [2021-06-12 20:54:28,140 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 20:54:28,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:54:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 20:54:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-06-12 20:54:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-06-12 20:54:28,148 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-06-12 20:54:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:28,148 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-06-12 20:54:28,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-06-12 20:54:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 20:54:28,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:28,149 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:28,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 20:54:28,372 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-06-12 20:54:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:28,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420037154] [2021-06-12 20:54:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:28,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420037154] [2021-06-12 20:54:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420037154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706222870] [2021-06-12 20:54:28,744 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 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 [2021-06-12 20:54:28,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:54:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:54:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706222870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:29,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:29,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-12 20:54:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176469464] [2021-06-12 20:54:29,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 20:54:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 20:54:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:54:29,485 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:35,837 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-06-12 20:54:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-12 20:54:35,837 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 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 61 [2021-06-12 20:54:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:35,840 INFO L225 Difference]: With dead ends: 3146 [2021-06-12 20:54:35,840 INFO L226 Difference]: Without dead ends: 2576 [2021-06-12 20:54:35,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 5741.0ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-06-12 20:54:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-12 20:54:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-06-12 20:54:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-06-12 20:54:35,852 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-06-12 20:54:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:35,852 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-06-12 20:54:35,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-06-12 20:54:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 20:54:35,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:35,853 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:36,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:54:36,075 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-06-12 20:54:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:36,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792121970] [2021-06-12 20:54:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:36,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792121970] [2021-06-12 20:54:36,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792121970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909271214] [2021-06-12 20:54:36,248 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 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 [2021-06-12 20:54:36,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 20:54:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:54:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909271214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:36,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:36,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-06-12 20:54:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723243430] [2021-06-12 20:54:36,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 20:54:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 20:54:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:54:36,923 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:42,340 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-06-12 20:54:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-12 20:54:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 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 61 [2021-06-12 20:54:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:42,342 INFO L225 Difference]: With dead ends: 2040 [2021-06-12 20:54:42,342 INFO L226 Difference]: Without dead ends: 2036 [2021-06-12 20:54:42,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5102.7ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-06-12 20:54:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-12 20:54:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-06-12 20:54:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-06-12 20:54:42,351 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-06-12 20:54:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:42,351 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-06-12 20:54:42,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-06-12 20:54:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 20:54:42,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:42,352 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:42,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 20:54:42,552 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-06-12 20:54:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:42,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916739646] [2021-06-12 20:54:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916739646] [2021-06-12 20:54:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916739646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613875588] [2021-06-12 20:54:42,706 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 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 [2021-06-12 20:54:42,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:54:42,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:54:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:42,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613875588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:42,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:42,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 20:54:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684331425] [2021-06-12 20:54:42,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:54:42,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:42,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:54:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:54:42,835 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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) [2021-06-12 20:54:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:43,105 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-06-12 20:54:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:54:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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 63 [2021-06-12 20:54:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:43,106 INFO L225 Difference]: With dead ends: 753 [2021-06-12 20:54:43,106 INFO L226 Difference]: Without dead ends: 666 [2021-06-12 20:54:43,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:54:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-12 20:54:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-06-12 20:54:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-06-12 20:54:43,114 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-06-12 20:54:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:43,114 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-06-12 20:54:43,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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) [2021-06-12 20:54:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-06-12 20:54:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 20:54:43,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:43,115 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:43,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:54:43,338 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-06-12 20:54:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:43,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987326362] [2021-06-12 20:54:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:43,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987326362] [2021-06-12 20:54:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987326362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531688579] [2021-06-12 20:54:43,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:54:43,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 20:54:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:54:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531688579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:44,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:44,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-06-12 20:54:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154855199] [2021-06-12 20:54:44,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-12 20:54:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-12 20:54:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:54:44,594 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:52,305 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-06-12 20:54:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-12 20:54:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 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 65 [2021-06-12 20:54:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:52,309 INFO L225 Difference]: With dead ends: 3595 [2021-06-12 20:54:52,309 INFO L226 Difference]: Without dead ends: 2935 [2021-06-12 20:54:52,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 6912.0ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-06-12 20:54:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-06-12 20:54:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-06-12 20:54:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-06-12 20:54:52,323 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-06-12 20:54:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:52,323 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-06-12 20:54:52,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-06-12 20:54:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 20:54:52,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:52,324 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:52,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:54:52,539 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-06-12 20:54:52,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:52,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108257375] [2021-06-12 20:54:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:52,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108257375] [2021-06-12 20:54:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108257375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752312659] [2021-06-12 20:54:52,726 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 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 [2021-06-12 20:54:52,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 20:54:52,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:54:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:53,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752312659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:53,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:53,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-06-12 20:54:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869260191] [2021-06-12 20:54:53,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 20:54:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 20:54:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:54:53,426 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:59,990 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-06-12 20:54:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-12 20:54:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 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 65 [2021-06-12 20:54:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:59,993 INFO L225 Difference]: With dead ends: 2350 [2021-06-12 20:54:59,993 INFO L226 Difference]: Without dead ends: 2346 [2021-06-12 20:54:59,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 6193.0ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-06-12 20:54:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-12 20:55:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-06-12 20:55:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-06-12 20:55:00,007 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-06-12 20:55:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:00,007 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-06-12 20:55:00,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-06-12 20:55:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 20:55:00,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:00,008 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:00,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:55:00,208 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-06-12 20:55:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:00,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539083828] [2021-06-12 20:55:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:00,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539083828] [2021-06-12 20:55:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539083828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19502101] [2021-06-12 20:55:00,385 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 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 [2021-06-12 20:55:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 20:55:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:00,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19502101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:00,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:00,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 20:55:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10547802] [2021-06-12 20:55:00,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:55:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:55:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:55:00,522 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:00,760 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-06-12 20:55:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:55:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 20:55:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:00,764 INFO L225 Difference]: With dead ends: 812 [2021-06-12 20:55:00,764 INFO L226 Difference]: Without dead ends: 719 [2021-06-12 20:55:00,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:55:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-12 20:55:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-06-12 20:55:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-06-12 20:55:00,773 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-06-12 20:55:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:00,773 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-06-12 20:55:00,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-06-12 20:55:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 20:55:00,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:00,774 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:00,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:55:00,989 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-06-12 20:55:00,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:00,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295596963] [2021-06-12 20:55:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:01,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295596963] [2021-06-12 20:55:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295596963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810941848] [2021-06-12 20:55:01,384 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 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 [2021-06-12 20:55:01,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:55:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:55:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810941848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-06-12 20:55:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399329335] [2021-06-12 20:55:02,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-06-12 20:55:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-06-12 20:55:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:55:02,286 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:12,125 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-06-12 20:55:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-06-12 20:55:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 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 69 [2021-06-12 20:55:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:12,135 INFO L225 Difference]: With dead ends: 4072 [2021-06-12 20:55:12,135 INFO L226 Difference]: Without dead ends: 3316 [2021-06-12 20:55:12,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 8522.5ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-06-12 20:55:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-06-12 20:55:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-06-12 20:55:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-06-12 20:55:12,179 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-06-12 20:55:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:12,180 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-06-12 20:55:12,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-06-12 20:55:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 20:55:12,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:12,181 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:12,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:12,403 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-06-12 20:55:12,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:12,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022761374] [2021-06-12 20:55:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:12,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022761374] [2021-06-12 20:55:12,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022761374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297979272] [2021-06-12 20:55:12,612 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 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 [2021-06-12 20:55:12,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 20:55:12,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:12,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:55:12,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:13,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297979272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:13,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:13,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-06-12 20:55:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658892782] [2021-06-12 20:55:13,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 20:55:13,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:13,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 20:55:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:55:13,470 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:21,556 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-06-12 20:55:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-12 20:55:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 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 69 [2021-06-12 20:55:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:21,559 INFO L225 Difference]: With dead ends: 2682 [2021-06-12 20:55:21,559 INFO L226 Difference]: Without dead ends: 2678 [2021-06-12 20:55:21,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 7621.8ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-06-12 20:55:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-12 20:55:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-06-12 20:55:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-06-12 20:55:21,577 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-06-12 20:55:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-06-12 20:55:21,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-06-12 20:55:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 20:55:21,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:21,578 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:21,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:21,793 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-06-12 20:55:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:21,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481501033] [2021-06-12 20:55:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:22,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:22,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481501033] [2021-06-12 20:55:22,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481501033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:22,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751825029] [2021-06-12 20:55:22,019 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 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 [2021-06-12 20:55:22,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:55:22,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 20:55:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:22,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751825029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:22,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:22,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 20:55:22,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540217948] [2021-06-12 20:55:22,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:55:22,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:55:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:55:22,170 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:22,470 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-06-12 20:55:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:55:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-06-12 20:55:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:22,471 INFO L225 Difference]: With dead ends: 871 [2021-06-12 20:55:22,471 INFO L226 Difference]: Without dead ends: 772 [2021-06-12 20:55:22,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:55:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-12 20:55:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-06-12 20:55:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-06-12 20:55:22,479 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-06-12 20:55:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:22,479 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-06-12 20:55:22,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-06-12 20:55:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-12 20:55:22,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:22,481 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:22,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 20:55:22,704 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-06-12 20:55:22,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:22,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383204374] [2021-06-12 20:55:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:23,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383204374] [2021-06-12 20:55:23,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383204374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422908524] [2021-06-12 20:55:23,169 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 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 [2021-06-12 20:55:23,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 20:55:23,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:23,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:55:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422908524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:24,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:24,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-12 20:55:24,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243910744] [2021-06-12 20:55:24,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-12 20:55:24,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-12 20:55:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:55:24,131 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:35,568 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-06-12 20:55:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-06-12 20:55:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 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 73 [2021-06-12 20:55:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:35,571 INFO L225 Difference]: With dead ends: 4577 [2021-06-12 20:55:35,571 INFO L226 Difference]: Without dead ends: 3719 [2021-06-12 20:55:35,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 9832.3ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-06-12 20:55:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-12 20:55:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-06-12 20:55:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-06-12 20:55:35,590 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-06-12 20:55:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:35,590 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-06-12 20:55:35,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-06-12 20:55:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-12 20:55:35,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:35,591 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:35,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:35,813 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-06-12 20:55:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:35,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230340056] [2021-06-12 20:55:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:36,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:36,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230340056] [2021-06-12 20:55:36,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230340056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:36,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281835970] [2021-06-12 20:55:36,053 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 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 [2021-06-12 20:55:36,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 20:55:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:55:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:36,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281835970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:36,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:36,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-12 20:55:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518865309] [2021-06-12 20:55:36,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 20:55:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 20:55:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:55:36,997 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:46,246 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-06-12 20:55:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-06-12 20:55:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 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 73 [2021-06-12 20:55:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:46,249 INFO L225 Difference]: With dead ends: 3036 [2021-06-12 20:55:46,249 INFO L226 Difference]: Without dead ends: 3032 [2021-06-12 20:55:46,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 8641.5ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-06-12 20:55:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-12 20:55:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-06-12 20:55:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-06-12 20:55:46,267 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-06-12 20:55:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:46,267 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-06-12 20:55:46,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-06-12 20:55:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 20:55:46,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:46,268 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:46,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:46,483 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-06-12 20:55:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:46,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342528592] [2021-06-12 20:55:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:46,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:46,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342528592] [2021-06-12 20:55:46,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342528592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:46,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406913248] [2021-06-12 20:55:46,704 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 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 [2021-06-12 20:55:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-12 20:55:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:46,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406913248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:46,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:46,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 20:55:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202990708] [2021-06-12 20:55:46,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:55:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:55:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:55:46,853 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:47,157 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-06-12 20:55:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:55:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-06-12 20:55:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:47,159 INFO L225 Difference]: With dead ends: 930 [2021-06-12 20:55:47,159 INFO L226 Difference]: Without dead ends: 825 [2021-06-12 20:55:47,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:55:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-12 20:55:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-06-12 20:55:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-06-12 20:55:47,166 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-06-12 20:55:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:47,167 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-06-12 20:55:47,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-06-12 20:55:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-12 20:55:47,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:47,168 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:47,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 20:55:47,368 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-06-12 20:55:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:47,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088070976] [2021-06-12 20:55:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:47,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088070976] [2021-06-12 20:55:47,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088070976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336904205] [2021-06-12 20:55:47,871 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 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 [2021-06-12 20:55:47,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:55:47,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:55:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:48,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336904205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:48,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:48,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-06-12 20:55:48,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352401124] [2021-06-12 20:55:48,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-12 20:55:48,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:48,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-12 20:55:48,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:55:48,890 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:02,214 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-06-12 20:56:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-06-12 20:56:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 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 77 [2021-06-12 20:56:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:02,218 INFO L225 Difference]: With dead ends: 5110 [2021-06-12 20:56:02,218 INFO L226 Difference]: Without dead ends: 4144 [2021-06-12 20:56:02,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 11395.7ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-06-12 20:56:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-12 20:56:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-06-12 20:56:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-06-12 20:56:02,237 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-06-12 20:56:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-06-12 20:56:02,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-06-12 20:56:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-12 20:56:02,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:02,238 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:02,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:56:02,439 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-06-12 20:56:02,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:02,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831080129] [2021-06-12 20:56:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:02,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:02,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831080129] [2021-06-12 20:56:02,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831080129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:02,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52167810] [2021-06-12 20:56:02,697 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 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 [2021-06-12 20:56:02,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-12 20:56:02,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:56:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:03,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52167810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:03,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:03,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-06-12 20:56:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785805681] [2021-06-12 20:56:03,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 20:56:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 20:56:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:56:03,766 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:14,330 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-06-12 20:56:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-12 20:56:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 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 77 [2021-06-12 20:56:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:14,332 INFO L225 Difference]: With dead ends: 3412 [2021-06-12 20:56:14,332 INFO L226 Difference]: Without dead ends: 3408 [2021-06-12 20:56:14,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 9963.2ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-06-12 20:56:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-06-12 20:56:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-06-12 20:56:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-06-12 20:56:14,348 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-06-12 20:56:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:14,348 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-06-12 20:56:14,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-06-12 20:56:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-12 20:56:14,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:14,349 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:14,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:56:14,561 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-06-12 20:56:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:14,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785874793] [2021-06-12 20:56:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:14,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785874793] [2021-06-12 20:56:14,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785874793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946553615] [2021-06-12 20:56:14,802 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 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 [2021-06-12 20:56:14,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:56:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-12 20:56:14,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946553615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:14,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:14,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 20:56:14,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776068090] [2021-06-12 20:56:14,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:56:14,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:56:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:56:14,964 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-06-12 20:56:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:15,298 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-06-12 20:56:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:56:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) Word has length 79 [2021-06-12 20:56:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:15,299 INFO L225 Difference]: With dead ends: 989 [2021-06-12 20:56:15,299 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 20:56:15,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:56:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 20:56:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-06-12 20:56:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-06-12 20:56:15,308 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-06-12 20:56:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:15,308 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-06-12 20:56:15,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-06-12 20:56:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-06-12 20:56:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-12 20:56:15,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:15,309 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:15,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:15,525 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-06-12 20:56:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:15,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119370607] [2021-06-12 20:56:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:16,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:16,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119370607] [2021-06-12 20:56:16,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119370607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:16,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341218318] [2021-06-12 20:56:16,170 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 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 [2021-06-12 20:56:16,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-12 20:56:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:56:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:17,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341218318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:17,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:17,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-06-12 20:56:17,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088902212] [2021-06-12 20:56:17,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-06-12 20:56:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-06-12 20:56:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:56:17,266 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:32,303 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-06-12 20:56:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-06-12 20:56:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 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 81 [2021-06-12 20:56:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:32,307 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 20:56:32,308 INFO L226 Difference]: Without dead ends: 4591 [2021-06-12 20:56:32,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 13373.1ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-06-12 20:56:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-12 20:56:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-06-12 20:56:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-06-12 20:56:32,368 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-06-12 20:56:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:32,368 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-06-12 20:56:32,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-06-12 20:56:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-12 20:56:32,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:32,369 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:32,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:56:32,569 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-06-12 20:56:32,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:32,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411864992] [2021-06-12 20:56:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:32,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411864992] [2021-06-12 20:56:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411864992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222272380] [2021-06-12 20:56:32,832 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 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 [2021-06-12 20:56:32,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-12 20:56:32,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:56:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:33,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222272380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:33,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:33,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-06-12 20:56:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119190800] [2021-06-12 20:56:33,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 20:56:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 20:56:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:56:33,836 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:46,220 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-06-12 20:56:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-06-12 20:56:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 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 81 [2021-06-12 20:56:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:46,223 INFO L225 Difference]: With dead ends: 3810 [2021-06-12 20:56:46,223 INFO L226 Difference]: Without dead ends: 3806 [2021-06-12 20:56:46,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 11602.7ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-06-12 20:56:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-12 20:56:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-06-12 20:56:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-06-12 20:56:46,243 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-06-12 20:56:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:46,244 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-06-12 20:56:46,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-06-12 20:56:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-12 20:56:46,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:46,245 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:46,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:46,456 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-06-12 20:56:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:46,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293323415] [2021-06-12 20:56:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:46,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293323415] [2021-06-12 20:56:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293323415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814156276] [2021-06-12 20:56:46,744 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 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 [2021-06-12 20:56:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-12 20:56:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:46,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814156276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:46,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:46,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-12 20:56:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968080882] [2021-06-12 20:56:46,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:56:46,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:56:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:56:46,911 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:47,296 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-06-12 20:56:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:56:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-06-12 20:56:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:47,298 INFO L225 Difference]: With dead ends: 1048 [2021-06-12 20:56:47,298 INFO L226 Difference]: Without dead ends: 931 [2021-06-12 20:56:47,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:56:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-06-12 20:56:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-06-12 20:56:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-06-12 20:56:47,305 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-06-12 20:56:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:47,305 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-06-12 20:56:47,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-06-12 20:56:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 20:56:47,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:47,306 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:47,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:47,521 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-06-12 20:56:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:47,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290442848] [2021-06-12 20:56:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:48,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290442848] [2021-06-12 20:56:48,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290442848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94599495] [2021-06-12 20:56:48,208 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 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 [2021-06-12 20:56:48,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:56:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:48,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:56:48,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94599495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:49,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:49,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-06-12 20:56:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121998437] [2021-06-12 20:56:49,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-12 20:56:49,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-12 20:56:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:56:49,401 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:07,083 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-06-12 20:57:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-06-12 20:57:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 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 85 [2021-06-12 20:57:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:07,090 INFO L225 Difference]: With dead ends: 6260 [2021-06-12 20:57:07,090 INFO L226 Difference]: Without dead ends: 5060 [2021-06-12 20:57:07,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 15447.2ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-06-12 20:57:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-06-12 20:57:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-06-12 20:57:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-06-12 20:57:07,121 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-06-12 20:57:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:07,121 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-06-12 20:57:07,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-06-12 20:57:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 20:57:07,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:07,123 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:07,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 20:57:07,337 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-06-12 20:57:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:07,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415012543] [2021-06-12 20:57:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:07,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:07,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415012543] [2021-06-12 20:57:07,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415012543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:07,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874906161] [2021-06-12 20:57:07,657 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 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 [2021-06-12 20:57:07,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-06-12 20:57:07,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:57:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874906161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:08,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:08,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-06-12 20:57:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206558695] [2021-06-12 20:57:08,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-12 20:57:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-12 20:57:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:57:08,926 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:22,852 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-06-12 20:57:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-06-12 20:57:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 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 85 [2021-06-12 20:57:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:22,855 INFO L225 Difference]: With dead ends: 4230 [2021-06-12 20:57:22,855 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 20:57:22,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 13337.9ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-06-12 20:57:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 20:57:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-06-12 20:57:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-06-12 20:57:22,874 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-06-12 20:57:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:22,874 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-06-12 20:57:22,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-06-12 20:57:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-12 20:57:22,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:22,875 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:23,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:23,089 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-06-12 20:57:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724303594] [2021-06-12 20:57:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:23,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724303594] [2021-06-12 20:57:23,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724303594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662748418] [2021-06-12 20:57:23,395 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 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 [2021-06-12 20:57:23,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:57:23,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-12 20:57:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662748418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:23,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:23,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-06-12 20:57:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770792142] [2021-06-12 20:57:23,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:57:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:57:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:57:23,552 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:23,982 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-06-12 20:57:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:57:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-06-12 20:57:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:23,983 INFO L225 Difference]: With dead ends: 1107 [2021-06-12 20:57:23,983 INFO L226 Difference]: Without dead ends: 984 [2021-06-12 20:57:23,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:57:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-06-12 20:57:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-06-12 20:57:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-06-12 20:57:23,989 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-06-12 20:57:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:23,990 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-06-12 20:57:23,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-06-12 20:57:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-12 20:57:23,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:23,990 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:24,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 20:57:24,191 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-06-12 20:57:24,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:24,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589810523] [2021-06-12 20:57:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:24,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:24,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589810523] [2021-06-12 20:57:24,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589810523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:24,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399341399] [2021-06-12 20:57:24,876 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 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 [2021-06-12 20:57:24,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-12 20:57:24,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:57:24,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399341399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:26,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:26,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-06-12 20:57:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135188973] [2021-06-12 20:57:26,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-06-12 20:57:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-06-12 20:57:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:57:26,181 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:46,850 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-06-12 20:57:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-06-12 20:57:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 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 89 [2021-06-12 20:57:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:46,854 INFO L225 Difference]: With dead ends: 6877 [2021-06-12 20:57:46,854 INFO L226 Difference]: Without dead ends: 5551 [2021-06-12 20:57:46,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 17627.1ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-06-12 20:57:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-12 20:57:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-06-12 20:57:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-06-12 20:57:46,880 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-06-12 20:57:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:46,880 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-06-12 20:57:46,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-06-12 20:57:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-12 20:57:46,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:46,881 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:47,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:57:47,082 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-06-12 20:57:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:47,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900950417] [2021-06-12 20:57:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:47,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900950417] [2021-06-12 20:57:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900950417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919239217] [2021-06-12 20:57:47,418 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 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 [2021-06-12 20:57:47,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-12 20:57:47,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:57:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:48,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919239217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:48,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:48,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-06-12 20:57:48,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914840950] [2021-06-12 20:57:48,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-12 20:57:48,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-12 20:57:48,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:57:48,641 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:04,739 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-06-12 20:58:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-06-12 20:58:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 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 89 [2021-06-12 20:58:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:04,743 INFO L225 Difference]: With dead ends: 4672 [2021-06-12 20:58:04,743 INFO L226 Difference]: Without dead ends: 4668 [2021-06-12 20:58:04,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 15215.5ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-06-12 20:58:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-06-12 20:58:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-06-12 20:58:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-06-12 20:58:04,772 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-06-12 20:58:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:04,772 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-06-12 20:58:04,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-06-12 20:58:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-12 20:58:04,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:04,773 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:04,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:04,995 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-06-12 20:58:04,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:04,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062935930] [2021-06-12 20:58:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:05,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062935930] [2021-06-12 20:58:05,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062935930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453431856] [2021-06-12 20:58:05,434 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 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 [2021-06-12 20:58:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-12 20:58:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:05,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453431856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:05,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:05,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 20:58:05,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071481713] [2021-06-12 20:58:05,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:58:05,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:58:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:58:05,618 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 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) [2021-06-12 20:58:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:06,140 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-06-12 20:58:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:58:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 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) Word has length 91 [2021-06-12 20:58:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:06,142 INFO L225 Difference]: With dead ends: 1166 [2021-06-12 20:58:06,142 INFO L226 Difference]: Without dead ends: 1037 [2021-06-12 20:58:06,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:58:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-12 20:58:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-06-12 20:58:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-06-12 20:58:06,149 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-06-12 20:58:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:06,149 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-06-12 20:58:06,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 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) [2021-06-12 20:58:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-06-12 20:58:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-12 20:58:06,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:06,150 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:06,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 20:58:06,350 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-06-12 20:58:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:06,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068409168] [2021-06-12 20:58:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:07,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068409168] [2021-06-12 20:58:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068409168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289878803] [2021-06-12 20:58:07,025 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 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 [2021-06-12 20:58:07,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:58:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:58:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:08,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289878803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:08,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:08,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-06-12 20:58:08,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298785911] [2021-06-12 20:58:08,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-06-12 20:58:08,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:08,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-06-12 20:58:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 20:58:08,469 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:32,919 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-06-12 20:58:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-06-12 20:58:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 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 93 [2021-06-12 20:58:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:32,923 INFO L225 Difference]: With dead ends: 7522 [2021-06-12 20:58:32,923 INFO L226 Difference]: Without dead ends: 6064 [2021-06-12 20:58:32,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 20233.5ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-06-12 20:58:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-06-12 20:58:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-06-12 20:58:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-06-12 20:58:32,955 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-06-12 20:58:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:32,955 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-06-12 20:58:32,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-06-12 20:58:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-12 20:58:32,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:32,956 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:33,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:33,178 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-06-12 20:58:33,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:33,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988790235] [2021-06-12 20:58:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:33,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:33,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988790235] [2021-06-12 20:58:33,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988790235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:33,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229297345] [2021-06-12 20:58:33,612 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 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 [2021-06-12 20:58:33,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-12 20:58:33,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:58:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:34,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229297345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:34,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:34,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-06-12 20:58:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118647908] [2021-06-12 20:58:34,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-12 20:58:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:34,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-12 20:58:34,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:58:34,929 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:53,366 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2021-06-12 20:58:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-06-12 20:58:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 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 93 [2021-06-12 20:58:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:53,371 INFO L225 Difference]: With dead ends: 5136 [2021-06-12 20:58:53,371 INFO L226 Difference]: Without dead ends: 5132 [2021-06-12 20:58:53,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 17457.8ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-06-12 20:58:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-12 20:58:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-06-12 20:58:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-06-12 20:58:53,405 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-06-12 20:58:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:53,405 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-06-12 20:58:53,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-06-12 20:58:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 20:58:53,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:53,406 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:53,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:58:53,629 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-06-12 20:58:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:53,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374007345] [2021-06-12 20:58:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:53,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374007345] [2021-06-12 20:58:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374007345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117980458] [2021-06-12 20:58:53,925 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 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 [2021-06-12 20:58:53,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:58:53,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-06-12 20:58:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:54,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117980458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:54,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:54,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 20:58:54,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64981553] [2021-06-12 20:58:54,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:58:54,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:58:54,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:58:54,089 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:54,597 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2021-06-12 20:58:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:58:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-06-12 20:58:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:54,599 INFO L225 Difference]: With dead ends: 1225 [2021-06-12 20:58:54,599 INFO L226 Difference]: Without dead ends: 1090 [2021-06-12 20:58:54,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:58:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-12 20:58:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-06-12 20:58:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-06-12 20:58:54,609 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-06-12 20:58:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:54,610 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-06-12 20:58:54,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-06-12 20:58:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-12 20:58:54,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:54,611 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:54,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:54,829 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-06-12 20:58:54,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:54,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038222990] [2021-06-12 20:58:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:55,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:55,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038222990] [2021-06-12 20:58:55,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038222990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:55,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407577578] [2021-06-12 20:58:55,654 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 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 [2021-06-12 20:58:55,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-12 20:58:55,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:58:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:57,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407577578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:57,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:57,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-06-12 20:58:57,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491028242] [2021-06-12 20:58:57,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-06-12 20:58:57,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:57,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-06-12 20:58:57,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:58:57,308 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:25,406 INFO L93 Difference]: Finished difference Result 8195 states and 16208 transitions. [2021-06-12 20:59:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-06-12 20:59:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 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 97 [2021-06-12 20:59:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:25,411 INFO L225 Difference]: With dead ends: 8195 [2021-06-12 20:59:25,411 INFO L226 Difference]: Without dead ends: 6599 [2021-06-12 20:59:25,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 23453.4ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-06-12 20:59:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-06-12 20:59:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-06-12 20:59:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-06-12 20:59:25,443 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-06-12 20:59:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:25,443 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-06-12 20:59:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-06-12 20:59:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-12 20:59:25,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:25,444 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:25,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 20:59:25,645 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:25,645 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-06-12 20:59:25,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:25,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479671411] [2021-06-12 20:59:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479671411] [2021-06-12 20:59:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479671411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:26,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971473674] [2021-06-12 20:59:26,054 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 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 [2021-06-12 20:59:26,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-12 20:59:26,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:59:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971473674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:27,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:27,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-06-12 20:59:27,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656760291] [2021-06-12 20:59:27,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-12 20:59:27,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-12 20:59:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:59:27,497 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:48,516 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2021-06-12 20:59:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-06-12 20:59:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 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 97 [2021-06-12 20:59:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:48,520 INFO L225 Difference]: With dead ends: 5622 [2021-06-12 20:59:48,520 INFO L226 Difference]: Without dead ends: 5618 [2021-06-12 20:59:48,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178074 ImplicationChecksByTransitivity, 19726.0ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-06-12 20:59:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-06-12 20:59:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2021-06-12 20:59:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2021-06-12 20:59:48,554 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2021-06-12 20:59:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:48,554 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2021-06-12 20:59:48,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2021-06-12 20:59:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-06-12 20:59:48,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:48,555 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:48,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:48,777 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -57617479, now seen corresponding path program 61 times [2021-06-12 20:59:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:48,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662296740] [2021-06-12 20:59:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:49,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:49,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662296740] [2021-06-12 20:59:49,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662296740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:49,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568458122] [2021-06-12 20:59:49,249 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 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 [2021-06-12 20:59:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-12 20:59:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568458122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:49,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:49,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 20:59:49,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258870095] [2021-06-12 20:59:49,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:59:49,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:59:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:59:49,446 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:50,016 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2021-06-12 20:59:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:59:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-06-12 20:59:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:50,017 INFO L225 Difference]: With dead ends: 1284 [2021-06-12 20:59:50,017 INFO L226 Difference]: Without dead ends: 1143 [2021-06-12 20:59:50,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:59:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-12 20:59:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2021-06-12 20:59:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2021-06-12 20:59:50,025 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2021-06-12 20:59:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2021-06-12 20:59:50,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2021-06-12 20:59:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-06-12 20:59:50,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:50,026 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:50,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 20:59:50,227 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1815225019, now seen corresponding path program 62 times [2021-06-12 20:59:50,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:50,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158210360] [2021-06-12 20:59:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:51,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:51,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158210360] [2021-06-12 20:59:51,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158210360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:51,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350206494] [2021-06-12 20:59:51,034 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 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 [2021-06-12 20:59:51,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:59:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:52,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350206494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:52,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:52,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-06-12 20:59:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773641999] [2021-06-12 20:59:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-06-12 20:59:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-06-12 20:59:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 20:59:52,777 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:26,068 INFO L93 Difference]: Finished difference Result 8896 states and 17602 transitions. [2021-06-12 21:00:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-06-12 21:00:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 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 101 [2021-06-12 21:00:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:26,074 INFO L225 Difference]: With dead ends: 8896 [2021-06-12 21:00:26,075 INFO L226 Difference]: Without dead ends: 7156 [2021-06-12 21:00:26,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218377 ImplicationChecksByTransitivity, 27266.3ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-06-12 21:00:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-06-12 21:00:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 511. [2021-06-12 21:00:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2021-06-12 21:00:26,119 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2021-06-12 21:00:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:26,119 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2021-06-12 21:00:26,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2021-06-12 21:00:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-06-12 21:00:26,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:26,120 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:26,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:26,333 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 195179061, now seen corresponding path program 63 times [2021-06-12 21:00:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62265579] [2021-06-12 21:00:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:26,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:26,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62265579] [2021-06-12 21:00:26,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62265579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:26,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40314307] [2021-06-12 21:00:26,727 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 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 [2021-06-12 21:00:26,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-06-12 21:00:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:00:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40314307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:28,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:28,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-06-12 21:00:28,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671648535] [2021-06-12 21:00:28,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-12 21:00:28,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-12 21:00:28,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:00:28,346 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:53,147 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2021-06-12 21:00:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-06-12 21:00:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 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 101 [2021-06-12 21:00:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:53,152 INFO L225 Difference]: With dead ends: 6130 [2021-06-12 21:00:53,152 INFO L226 Difference]: Without dead ends: 6126 [2021-06-12 21:00:53,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211754 ImplicationChecksByTransitivity, 23056.8ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-06-12 21:00:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-06-12 21:00:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2021-06-12 21:00:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2021-06-12 21:00:53,183 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2021-06-12 21:00:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:53,183 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2021-06-12 21:00:53,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2021-06-12 21:00:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-06-12 21:00:53,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:53,184 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:53,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 21:00:53,384 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -248290439, now seen corresponding path program 64 times [2021-06-12 21:00:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:53,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643217970] [2021-06-12 21:00:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:53,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643217970] [2021-06-12 21:00:53,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643217970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787287735] [2021-06-12 21:00:53,736 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 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 [2021-06-12 21:00:53,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:00:53,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-12 21:00:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787287735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:53,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:53,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 21:00:53,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131986281] [2021-06-12 21:00:53,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:00:53,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:00:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:00:53,921 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:54,547 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2021-06-12 21:00:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:00:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-06-12 21:00:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:54,548 INFO L225 Difference]: With dead ends: 1343 [2021-06-12 21:00:54,548 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 21:00:54,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:00:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 21:00:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2021-06-12 21:00:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-06-12 21:00:54,556 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2021-06-12 21:00:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:54,556 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-06-12 21:00:54,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-06-12 21:00:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 21:00:54,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:54,557 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:54,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:00:54,758 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 28402043, now seen corresponding path program 65 times [2021-06-12 21:00:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801000486] [2021-06-12 21:00:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:55,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801000486] [2021-06-12 21:00:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801000486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280480329] [2021-06-12 21:00:55,676 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 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 [2021-06-12 21:00:55,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-12 21:00:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:00:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280480329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-06-12 21:00:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074129953] [2021-06-12 21:00:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-06-12 21:00:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-06-12 21:00:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 21:00:57,554 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:34,615 INFO L93 Difference]: Finished difference Result 9625 states and 19052 transitions. [2021-06-12 21:01:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-06-12 21:01:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 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 105 [2021-06-12 21:01:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:34,621 INFO L225 Difference]: With dead ends: 9625 [2021-06-12 21:01:34,621 INFO L226 Difference]: Without dead ends: 7735 [2021-06-12 21:01:34,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258241 ImplicationChecksByTransitivity, 29987.0ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-06-12 21:01:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-06-12 21:01:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 533. [2021-06-12 21:01:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2021-06-12 21:01:34,657 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2021-06-12 21:01:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:34,657 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2021-06-12 21:01:34,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2021-06-12 21:01:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 21:01:34,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:34,658 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:34,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:01:34,859 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash -972912839, now seen corresponding path program 66 times [2021-06-12 21:01:34,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:34,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57010428] [2021-06-12 21:01:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:35,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57010428] [2021-06-12 21:01:35,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57010428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366587997] [2021-06-12 21:01:35,290 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 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 [2021-06-12 21:01:35,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-06-12 21:01:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:01:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:36,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366587997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:36,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:36,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-06-12 21:01:36,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996136360] [2021-06-12 21:01:36,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-12 21:01:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-12 21:01:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:01:36,987 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:03,903 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2021-06-12 21:02:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-06-12 21:02:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 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 105 [2021-06-12 21:02:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:03,908 INFO L225 Difference]: With dead ends: 6660 [2021-06-12 21:02:03,908 INFO L226 Difference]: Without dead ends: 6656 [2021-06-12 21:02:03,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250004 ImplicationChecksByTransitivity, 24942.4ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-06-12 21:02:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-06-12 21:02:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2021-06-12 21:02:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.0833333333333335) internal successors, (925), 444 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2021-06-12 21:02:03,945 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2021-06-12 21:02:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:03,945 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2021-06-12 21:02:03,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2021-06-12 21:02:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-06-12 21:02:03,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:03,946 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:04,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:04,147 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash 601748025, now seen corresponding path program 67 times [2021-06-12 21:02:04,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:04,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164446211] [2021-06-12 21:02:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:04,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164446211] [2021-06-12 21:02:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164446211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508993135] [2021-06-12 21:02:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:02:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-12 21:02:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:04,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508993135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:04,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:04,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 21:02:04,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585005732] [2021-06-12 21:02:04,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:02:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:02:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:02:04,692 INFO L87 Difference]: Start difference. First operand 445 states and 925 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:05,350 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2021-06-12 21:02:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:02:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-06-12 21:02:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:05,351 INFO L225 Difference]: With dead ends: 1402 [2021-06-12 21:02:05,351 INFO L226 Difference]: Without dead ends: 1249 [2021-06-12 21:02:05,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:02:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-12 21:02:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2021-06-12 21:02:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.15978835978836) internal successors, (2041), 945 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2021-06-12 21:02:05,359 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2021-06-12 21:02:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:05,359 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2021-06-12 21:02:05,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2021-06-12 21:02:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-12 21:02:05,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:05,360 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:05,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:02:05,561 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825669, now seen corresponding path program 68 times [2021-06-12 21:02:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:05,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454939891] [2021-06-12 21:02:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:06,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454939891] [2021-06-12 21:02:06,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454939891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3276485] [2021-06-12 21:02:06,493 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 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 [2021-06-12 21:02:06,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:02:06,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:02:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3276485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-06-12 21:02:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975716101] [2021-06-12 21:02:08,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-06-12 21:02:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-06-12 21:02:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-06-12 21:02:08,399 INFO L87 Difference]: Start difference. First operand 946 states and 2041 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:48,714 INFO L93 Difference]: Finished difference Result 10382 states and 20558 transitions. [2021-06-12 21:02:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-06-12 21:02:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 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 109 [2021-06-12 21:02:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:48,721 INFO L225 Difference]: With dead ends: 10382 [2021-06-12 21:02:48,721 INFO L226 Difference]: Without dead ends: 8336 [2021-06-12 21:02:48,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303348 ImplicationChecksByTransitivity, 32599.7ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-06-12 21:02:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-06-12 21:02:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 555. [2021-06-12 21:02:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.068592057761733) internal successors, (1146), 554 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1146 transitions. [2021-06-12 21:02:48,770 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1146 transitions. Word has length 109 [2021-06-12 21:02:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:48,770 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1146 transitions. [2021-06-12 21:02:48,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1146 transitions. [2021-06-12 21:02:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-12 21:02:48,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:48,771 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:48,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:48,973 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash -561063363, now seen corresponding path program 69 times [2021-06-12 21:02:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900114354] [2021-06-12 21:02:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:49,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:49,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900114354] [2021-06-12 21:02:49,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900114354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:49,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520497495] [2021-06-12 21:02:49,420 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 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 [2021-06-12 21:02:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-06-12 21:02:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:02:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:51,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520497495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:51,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:51,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-06-12 21:02:51,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964292036] [2021-06-12 21:02:51,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-12 21:02:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-12 21:02:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:02:51,235 INFO L87 Difference]: Start difference. First operand 555 states and 1146 transitions. Second operand has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:20,776 INFO L93 Difference]: Finished difference Result 7212 states and 14398 transitions. [2021-06-12 21:03:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-12 21:03:20,838 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 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 109 [2021-06-12 21:03:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:20,843 INFO L225 Difference]: With dead ends: 7212 [2021-06-12 21:03:20,843 INFO L226 Difference]: Without dead ends: 7208 [2021-06-12 21:03:20,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293220 ImplicationChecksByTransitivity, 27357.9ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-06-12 21:03:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-06-12 21:03:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 463. [2021-06-12 21:03:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0844155844155843) internal successors, (963), 462 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 963 transitions. [2021-06-12 21:03:20,879 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 963 transitions. Word has length 109 [2021-06-12 21:03:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:20,879 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 963 transitions. [2021-06-12 21:03:20,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 963 transitions. [2021-06-12 21:03:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-06-12 21:03:20,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:20,880 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:21,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-12 21:03:21,081 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1149059065, now seen corresponding path program 70 times [2021-06-12 21:03:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:21,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34816707] [2021-06-12 21:03:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:21,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:21,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34816707] [2021-06-12 21:03:21,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34816707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:21,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183267929] [2021-06-12 21:03:21,485 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 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 [2021-06-12 21:03:21,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:03:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-12 21:03:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:21,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183267929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:21,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:21,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-06-12 21:03:21,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182402731] [2021-06-12 21:03:21,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:03:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:03:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:03:21,682 INFO L87 Difference]: Start difference. First operand 463 states and 963 transitions. Second operand has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:22,416 INFO L93 Difference]: Finished difference Result 1461 states and 2884 transitions. [2021-06-12 21:03:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:03:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-06-12 21:03:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:22,418 INFO L225 Difference]: With dead ends: 1461 [2021-06-12 21:03:22,418 INFO L226 Difference]: Without dead ends: 1302 [2021-06-12 21:03:22,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:03:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-06-12 21:03:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 986. [2021-06-12 21:03:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.1604060913705583) internal successors, (2128), 985 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2128 transitions. [2021-06-12 21:03:22,427 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2128 transitions. Word has length 111 [2021-06-12 21:03:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:22,427 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 2128 transitions. [2021-06-12 21:03:22,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2128 transitions. [2021-06-12 21:03:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-06-12 21:03:22,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:22,428 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:22,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:22,629 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1767498757, now seen corresponding path program 71 times [2021-06-12 21:03:22,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:22,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880731848] [2021-06-12 21:03:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:23,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:23,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880731848] [2021-06-12 21:03:23,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880731848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:23,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585926163] [2021-06-12 21:03:23,588 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 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 [2021-06-12 21:03:23,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-06-12 21:03:23,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:03:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585926163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-06-12 21:03:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503521448] [2021-06-12 21:03:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-06-12 21:03:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-06-12 21:03:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 21:03:25,726 INFO L87 Difference]: Start difference. First operand 986 states and 2128 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:12,839 INFO L93 Difference]: Finished difference Result 11167 states and 22120 transitions. [2021-06-12 21:04:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-06-12 21:04:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 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 113 [2021-06-12 21:04:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:12,846 INFO L225 Difference]: With dead ends: 11167 [2021-06-12 21:04:12,847 INFO L226 Difference]: Without dead ends: 8959 [2021-06-12 21:04:12,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354141 ImplicationChecksByTransitivity, 36996.0ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-06-12 21:04:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-06-12 21:04:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 577. [2021-06-12 21:04:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.0694444444444446) internal successors, (1192), 576 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1192 transitions. [2021-06-12 21:04:12,895 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1192 transitions. Word has length 113 [2021-06-12 21:04:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:12,895 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1192 transitions. [2021-06-12 21:04:12,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1192 transitions. [2021-06-12 21:04:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-06-12 21:04:12,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:12,896 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:13,096 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash -770692287, now seen corresponding path program 72 times [2021-06-12 21:04:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808390789] [2021-06-12 21:04:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:13,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:13,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808390789] [2021-06-12 21:04:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808390789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:13,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849709907] [2021-06-12 21:04:13,503 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 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 [2021-06-12 21:04:13,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-06-12 21:04:13,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:04:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849709907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:15,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:15,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-06-12 21:04:15,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11409619] [2021-06-12 21:04:15,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-06-12 21:04:15,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-06-12 21:04:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:04:15,419 INFO L87 Difference]: Start difference. First operand 577 states and 1192 transitions. Second operand has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:48,323 INFO L93 Difference]: Finished difference Result 7786 states and 15546 transitions. [2021-06-12 21:04:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-06-12 21:04:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 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 113 [2021-06-12 21:04:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:48,329 INFO L225 Difference]: With dead ends: 7786 [2021-06-12 21:04:48,329 INFO L226 Difference]: Without dead ends: 7782 [2021-06-12 21:04:48,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341815 ImplicationChecksByTransitivity, 30374.1ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-06-12 21:04:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2021-06-12 21:04:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 481. [2021-06-12 21:04:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.0854166666666667) internal successors, (1001), 480 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1001 transitions. [2021-06-12 21:04:48,373 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1001 transitions. Word has length 113 [2021-06-12 21:04:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:48,373 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1001 transitions. [2021-06-12 21:04:48,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1001 transitions. [2021-06-12 21:04:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 21:04:48,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:48,374 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:48,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:48,574 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1317932217, now seen corresponding path program 73 times [2021-06-12 21:04:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:48,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874081765] [2021-06-12 21:04:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:48,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:48,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874081765] [2021-06-12 21:04:48,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874081765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:48,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623181208] [2021-06-12 21:04:48,981 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 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 [2021-06-12 21:04:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-12 21:04:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623181208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:49,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-12 21:04:49,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495645888] [2021-06-12 21:04:49,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:04:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:04:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:04:49,177 INFO L87 Difference]: Start difference. First operand 481 states and 1001 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:50,045 INFO L93 Difference]: Finished difference Result 1520 states and 3001 transitions. [2021-06-12 21:04:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:04:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 21:04:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:50,047 INFO L225 Difference]: With dead ends: 1520 [2021-06-12 21:04:50,047 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 21:04:50,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:04:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 21:04:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1026. [2021-06-12 21:04:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.1609756097560977) internal successors, (2215), 1025 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2215 transitions. [2021-06-12 21:04:50,055 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2215 transitions. Word has length 115 [2021-06-12 21:04:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:50,055 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 2215 transitions. [2021-06-12 21:04:50,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2215 transitions. [2021-06-12 21:04:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-06-12 21:04:50,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:50,056 INFO L472 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:50,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:04:50,257 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1761941435, now seen corresponding path program 74 times [2021-06-12 21:04:50,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:50,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959804842] [2021-06-12 21:04:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:51,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959804842] [2021-06-12 21:04:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959804842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193312719] [2021-06-12 21:04:51,301 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 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 [2021-06-12 21:04:51,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:04:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:04:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:53,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193312719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:53,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:53,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-06-12 21:04:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632987380] [2021-06-12 21:04:53,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-06-12 21:04:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:53,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-06-12 21:04:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 21:04:53,615 INFO L87 Difference]: Start difference. First operand 1026 states and 2215 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 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... [2021-06-12 21:05:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 644 states. [2021-06-12 21:05:33,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:33,639 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:05:33,641 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:05:33,642 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:05:33,643 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:05:33 BasicIcfg [2021-06-12 21:05:33,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:05:33,643 INFO L168 Benchmark]: Toolchain (without parser) took 727420.12 ms. Allocated memory was 209.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 190.4 MB in the beginning and 249.4 MB in the end (delta: -58.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-06-12 21:05:33,643 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 209.7 MB. Free memory is still 191.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:05:33,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 209.7 MB. Free memory was 190.3 MB in the beginning and 188.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:05:33,643 INFO L168 Benchmark]: Boogie Preprocessor took 12.17 ms. Allocated memory is still 209.7 MB. Free memory was 188.9 MB in the beginning and 188.0 MB in the end (delta: 870.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:05:33,643 INFO L168 Benchmark]: RCFGBuilder took 272.00 ms. Allocated memory is still 209.7 MB. Free memory was 187.9 MB in the beginning and 176.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:05:33,643 INFO L168 Benchmark]: TraceAbstraction took 727105.65 ms. Allocated memory was 209.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 175.6 MB in the beginning and 249.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-06-12 21:05:33,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 209.7 MB. Free memory is still 191.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 209.7 MB. Free memory was 190.3 MB in the beginning and 188.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.17 ms. Allocated memory is still 209.7 MB. Free memory was 188.9 MB in the beginning and 188.0 MB in the end (delta: 870.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.00 ms. Allocated memory is still 209.7 MB. Free memory was 187.9 MB in the beginning and 176.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 727105.65 ms. Allocated memory was 209.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 175.6 MB in the beginning and 249.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1026states) and FLOYD_HOARE automaton (currently 644 states, 110 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 750 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 727016.1ms, OverallIterations: 77, TraceHistogramMax: 26, EmptinessCheckTime: 61.3ms, AutomataDifference: 636859.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6914 SDtfs, 49874 SDslu, 125292 SDs, 0 SdLazy, 130904 SolverSat, 6275 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60117.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21522 GetRequests, 4228 SyntacticMatches, 50 SemanticMatches, 17243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337367 ImplicationChecksByTransitivity, 553081.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1026occurred in iteration=76, InterpolantAutomatonStates: 14274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 918.2ms AutomataMinimizationTime, 76 MinimizatonAttempts, 150437 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 438.6ms SsaConstructionTime, 2303.5ms SatisfiabilityAnalysisTime, 68553.0ms InterpolantComputationTime, 10082 NumberOfCodeBlocks, 10082 NumberOfCodeBlocksAsserted, 704 NumberOfCheckSat, 9930 ConstructedInterpolants, 0 QuantifiedInterpolants, 82282 SizeOfPredicates, 225 NumberOfNonLiveVariables, 12875 ConjunctsInSsa, 2875 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 21499/66401 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