/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:26:09,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:26:09,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:26:09,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:26:09,180 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 [2022-01-18 06:26:09,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:26:09,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:26:09,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:26:09,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:26:09,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:26:09,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:26:09,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:26:09,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:26:09,213 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:26:09,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:26:09,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:26:09,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:26:09,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:26:09,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:26:09,215 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:26:09,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:26:09,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:26:09,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:26:09,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:26:09,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:26:09,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:26:09,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:26:09,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:26:09,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:26:09,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:26:09,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:26:09,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:26:09,488 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:26:09,489 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:26:09,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2022-01-18 06:26:09,490 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2022-01-18 06:26:09,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:26:09,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:26:09,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:26:09,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:26:09,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:26:09,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,552 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:26:09,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:26:09,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:26:09,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:26:09,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:26:09,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:26:09,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:26:09,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:26:09,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:26:09,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/1) ... [2022-01-18 06:26:09,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:26:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:09,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:26:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:26:09,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:26:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:26:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:26:09,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:26:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:26:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:26:09,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:26:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:26:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:26:09,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:26:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:26:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:26:09,640 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:26:09,686 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:26:09,688 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:26:09,846 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:26:09,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:26:09,876 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:26:09,878 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:26:09 BoogieIcfgContainer [2022-01-18 06:26:09,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:26:09,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:26:09,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:26:09,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:26:09,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:26:09" (1/2) ... [2022-01-18 06:26:09,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f6484b and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:26:09, skipping insertion in model container [2022-01-18 06:26:09,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:26:09" (2/2) ... [2022-01-18 06:26:09,900 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2022-01-18 06:26:09,903 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:26:09,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:26:09,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:26:09,904 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:26:09,966 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:26:10,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:26:10,025 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:26:10,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:26:10,054 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-01-18 06:26:10,122 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 06:26:10,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:10,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:10,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239154, now seen corresponding path program 1 times [2022-01-18 06:26:10,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:10,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534306127] [2022-01-18 06:26:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:10,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:10,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534306127] [2022-01-18 06:26:10,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534306127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:26:10,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:26:10,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:26:10,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533994599] [2022-01-18 06:26:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:26:10,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:26:10,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:10,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:26:10,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,305 INFO L87 Difference]: Start difference. First operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:10,374 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2022-01-18 06:26:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:26:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 06:26:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:10,392 INFO L225 Difference]: With dead ends: 393 [2022-01-18 06:26:10,392 INFO L226 Difference]: Without dead ends: 393 [2022-01-18 06:26:10,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,396 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:10,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:26:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-18 06:26:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-01-18 06:26:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2022-01-18 06:26:10,512 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2022-01-18 06:26:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2022-01-18 06:26:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2022-01-18 06:26:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 06:26:10,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:10,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:10,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:26:10,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash 492079791, now seen corresponding path program 1 times [2022-01-18 06:26:10,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:10,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025376790] [2022-01-18 06:26:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:10,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:10,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025376790] [2022-01-18 06:26:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025376790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:26:10,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:26:10,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:26:10,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767767789] [2022-01-18 06:26:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:26:10,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:26:10,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:26:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,557 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:10,612 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2022-01-18 06:26:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:26:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-01-18 06:26:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:10,616 INFO L225 Difference]: With dead ends: 442 [2022-01-18 06:26:10,616 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 06:26:10,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,618 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:26:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 06:26:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-18 06:26:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2022-01-18 06:26:10,648 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2022-01-18 06:26:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:10,648 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2022-01-18 06:26:10,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2022-01-18 06:26:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:26:10,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:10,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:10,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:26:10,653 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash 806798595, now seen corresponding path program 1 times [2022-01-18 06:26:10,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:10,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476705057] [2022-01-18 06:26:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:10,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:26:10,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476705057] [2022-01-18 06:26:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476705057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:26:10,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:26:10,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:26:10,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302135619] [2022-01-18 06:26:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:26:10,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:26:10,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:26:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,709 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:10,746 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2022-01-18 06:26:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:26:10,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:26:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:10,751 INFO L225 Difference]: With dead ends: 880 [2022-01-18 06:26:10,751 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 06:26:10,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:10,753 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:10,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:26:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 06:26:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2022-01-18 06:26:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2022-01-18 06:26:10,781 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2022-01-18 06:26:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2022-01-18 06:26:10,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2022-01-18 06:26:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:26:10,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:10,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:10,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:26:10,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1435505509, now seen corresponding path program 1 times [2022-01-18 06:26:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112354512] [2022-01-18 06:26:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:26:10,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112354512] [2022-01-18 06:26:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112354512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758569152] [2022-01-18 06:26:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:10,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:10,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:10,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:26:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:26:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:26:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:11,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:26:11,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:26:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:26:11,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758569152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:11,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:11,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-01-18 06:26:11,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621169821] [2022-01-18 06:26:11,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:26:11,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:26:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:26:11,444 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-01-18 06:26:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:11,757 INFO L93 Difference]: Finished difference Result 1649 states and 4903 transitions. [2022-01-18 06:26:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 06:26:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 28 [2022-01-18 06:26:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:11,766 INFO L225 Difference]: With dead ends: 1649 [2022-01-18 06:26:11,766 INFO L226 Difference]: Without dead ends: 1033 [2022-01-18 06:26:11,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:26:11,770 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:11,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 185 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:26:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-18 06:26:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 773. [2022-01-18 06:26:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.966321243523316) internal successors, (2290), 772 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2290 transitions. [2022-01-18 06:26:11,806 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2290 transitions. Word has length 28 [2022-01-18 06:26:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:11,806 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2290 transitions. [2022-01-18 06:26:11,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-01-18 06:26:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2290 transitions. [2022-01-18 06:26:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:26:11,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:11,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:11,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 06:26:12,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:12,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1406640581, now seen corresponding path program 2 times [2022-01-18 06:26:12,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:12,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66174384] [2022-01-18 06:26:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:12,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:12,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66174384] [2022-01-18 06:26:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66174384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:26:12,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:26:12,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:26:12,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246895812] [2022-01-18 06:26:12,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:26:12,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:26:12,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:26:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:12,099 INFO L87 Difference]: Start difference. First operand 773 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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) [2022-01-18 06:26:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:12,123 INFO L93 Difference]: Finished difference Result 616 states and 1811 transitions. [2022-01-18 06:26:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:26:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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 28 [2022-01-18 06:26:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:12,127 INFO L225 Difference]: With dead ends: 616 [2022-01-18 06:26:12,128 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 06:26:12,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:26:12,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:12,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:26:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 06:26:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-18 06:26:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.9447154471544716) internal successors, (1811), 615 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1811 transitions. [2022-01-18 06:26:12,148 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1811 transitions. Word has length 28 [2022-01-18 06:26:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:12,148 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1811 transitions. [2022-01-18 06:26:12,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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) [2022-01-18 06:26:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1811 transitions. [2022-01-18 06:26:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 06:26:12,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:12,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:12,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 06:26:12,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1436964612, now seen corresponding path program 3 times [2022-01-18 06:26:12,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166277759] [2022-01-18 06:26:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:12,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:26:12,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166277759] [2022-01-18 06:26:12,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166277759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:12,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259348744] [2022-01-18 06:26:12,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:26:12,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:12,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:12,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:12,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:26:12,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:26:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 06:26:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:12,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 06:26:12,705 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:26:12,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 06:26:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:26:12,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:13,259 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 06:26:13,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2022-01-18 06:26:13,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-01-18 06:26:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:26:13,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259348744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:13,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:13,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2022-01-18 06:26:13,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787070465] [2022-01-18 06:26:13,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:13,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:26:13,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:26:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:26:13,314 INFO L87 Difference]: Start difference. First operand 616 states and 1811 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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) [2022-01-18 06:26:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:15,048 INFO L93 Difference]: Finished difference Result 2902 states and 8623 transitions. [2022-01-18 06:26:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:26:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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 35 [2022-01-18 06:26:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:15,059 INFO L225 Difference]: With dead ends: 2902 [2022-01-18 06:26:15,059 INFO L226 Difference]: Without dead ends: 1998 [2022-01-18 06:26:15,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=883, Invalid=3947, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:26:15,062 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1175 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:15,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 306 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:26:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-18 06:26:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1029. [2022-01-18 06:26:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.9640077821011674) internal successors, (3047), 1028 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3047 transitions. [2022-01-18 06:26:15,096 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3047 transitions. Word has length 35 [2022-01-18 06:26:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:15,097 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3047 transitions. [2022-01-18 06:26:15,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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) [2022-01-18 06:26:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3047 transitions. [2022-01-18 06:26:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:26:15,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:15,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:15,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:26:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 06:26:15,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash 899682228, now seen corresponding path program 4 times [2022-01-18 06:26:15,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614216654] [2022-01-18 06:26:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:26:15,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614216654] [2022-01-18 06:26:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614216654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101892091] [2022-01-18 06:26:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:26:15,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:15,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:15,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:26:15,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:26:15,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:15,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:26:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:15,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 06:26:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:26:15,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:15,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:26:15,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:26:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:26:15,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101892091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:15,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:15,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2022-01-18 06:26:15,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771210414] [2022-01-18 06:26:15,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:15,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:26:15,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:26:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:26:15,668 INFO L87 Difference]: Start difference. First operand 1029 states and 3047 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-01-18 06:26:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:15,715 INFO L93 Difference]: Finished difference Result 2681 states and 7863 transitions. [2022-01-18 06:26:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:26:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 42 [2022-01-18 06:26:15,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:15,731 INFO L225 Difference]: With dead ends: 2681 [2022-01-18 06:26:15,731 INFO L226 Difference]: Without dead ends: 2651 [2022-01-18 06:26:15,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:26:15,732 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:15,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:26:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-01-18 06:26:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2233. [2022-01-18 06:26:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2022-01-18 06:26:15,805 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 42 [2022-01-18 06:26:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:15,805 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2022-01-18 06:26:15,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-01-18 06:26:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2022-01-18 06:26:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:26:15,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:15,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:15,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:26:16,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:16,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1081871720, now seen corresponding path program 5 times [2022-01-18 06:26:16,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:16,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432334511] [2022-01-18 06:26:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:16,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:16,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432334511] [2022-01-18 06:26:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432334511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377475391] [2022-01-18 06:26:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:26:16,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:16,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:16,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:26:16,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:26:16,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:26:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:16,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:26:16,976 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:26:16,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 99 [2022-01-18 06:26:16,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:16,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 108 [2022-01-18 06:26:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:17,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:17,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:17,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 06:26:18,267 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-01-18 06:26:18,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 133 [2022-01-18 06:26:18,290 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 06:26:18,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 118 [2022-01-18 06:26:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:18,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377475391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:18,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:18,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 06:26:18,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468887241] [2022-01-18 06:26:18,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:18,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:26:18,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:26:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:26:18,785 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 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) [2022-01-18 06:26:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:22,175 INFO L93 Difference]: Finished difference Result 6909 states and 20715 transitions. [2022-01-18 06:26:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:26:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 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 42 [2022-01-18 06:26:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:22,204 INFO L225 Difference]: With dead ends: 6909 [2022-01-18 06:26:22,204 INFO L226 Difference]: Without dead ends: 5504 [2022-01-18 06:26:22,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1420, Invalid=4900, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:26:22,207 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 933 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:22,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1474 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:26:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-01-18 06:26:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3165. [2022-01-18 06:26:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 3.036030341340076) internal successors, (9606), 3164 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 9606 transitions. [2022-01-18 06:26:22,331 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 9606 transitions. Word has length 42 [2022-01-18 06:26:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:22,332 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 9606 transitions. [2022-01-18 06:26:22,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 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) [2022-01-18 06:26:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 9606 transitions. [2022-01-18 06:26:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:26:22,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:22,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:22,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:26:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:22,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash 318436278, now seen corresponding path program 6 times [2022-01-18 06:26:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767224634] [2022-01-18 06:26:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:22,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:22,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767224634] [2022-01-18 06:26:22,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767224634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424327914] [2022-01-18 06:26:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:26:22,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:22,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:22,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:26:22,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:26:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:26:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:23,264 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:26:23,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:26:23,452 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:26:23,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:26:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:26:23,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:24,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:24,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2022-01-18 06:26:24,214 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 06:26:24,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 108 [2022-01-18 06:26:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:26:24,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424327914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:24,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:24,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-01-18 06:26:24,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356530198] [2022-01-18 06:26:24,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:24,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:26:24,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:26:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:26:24,358 INFO L87 Difference]: Start difference. First operand 3165 states and 9606 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 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) [2022-01-18 06:26:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:38,284 INFO L93 Difference]: Finished difference Result 20247 states and 60887 transitions. [2022-01-18 06:26:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-01-18 06:26:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 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 42 [2022-01-18 06:26:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:38,356 INFO L225 Difference]: With dead ends: 20247 [2022-01-18 06:26:38,356 INFO L226 Difference]: Without dead ends: 18801 [2022-01-18 06:26:38,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42831 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18579, Invalid=65231, Unknown=0, NotChecked=0, Total=83810 [2022-01-18 06:26:38,371 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2741 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:38,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 1130 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 06:26:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2022-01-18 06:26:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 7666. [2022-01-18 06:26:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 3.0841487279843443) internal successors, (23640), 7665 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 23640 transitions. [2022-01-18 06:26:38,757 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 23640 transitions. Word has length 42 [2022-01-18 06:26:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:38,759 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 23640 transitions. [2022-01-18 06:26:38,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 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) [2022-01-18 06:26:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 23640 transitions. [2022-01-18 06:26:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:26:38,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:38,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:38,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:26:38,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:38,996 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -859641656, now seen corresponding path program 7 times [2022-01-18 06:26:38,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:38,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490367857] [2022-01-18 06:26:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:38,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:39,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490367857] [2022-01-18 06:26:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490367857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598019049] [2022-01-18 06:26:39,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:26:39,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:39,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:26:39,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:26:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:39,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:26:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:39,563 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:26:39,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:26:39,741 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:26:39,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 06:26:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:39,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:40,743 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 06:26:40,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 112 [2022-01-18 06:26:40,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:40,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 06:26:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598019049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:40,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:40,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 31 [2022-01-18 06:26:40,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8745923] [2022-01-18 06:26:40,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:40,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:26:40,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:26:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:26:40,878 INFO L87 Difference]: Start difference. First operand 7666 states and 23640 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 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) [2022-01-18 06:26:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:59,032 INFO L93 Difference]: Finished difference Result 27028 states and 81557 transitions. [2022-01-18 06:26:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-01-18 06:26:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 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 42 [2022-01-18 06:26:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:59,117 INFO L225 Difference]: With dead ends: 27028 [2022-01-18 06:26:59,117 INFO L226 Difference]: Without dead ends: 23716 [2022-01-18 06:26:59,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34994 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=14455, Invalid=60347, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 06:26:59,123 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1855 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:59,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 1881 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 06:26:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23716 states. [2022-01-18 06:26:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23716 to 7942. [2022-01-18 06:26:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 3.1081727742097973) internal successors, (24682), 7941 states have internal predecessors, (24682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 24682 transitions. [2022-01-18 06:26:59,493 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 24682 transitions. Word has length 42 [2022-01-18 06:26:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:59,493 INFO L470 AbstractCegarLoop]: Abstraction has 7942 states and 24682 transitions. [2022-01-18 06:26:59,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 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) [2022-01-18 06:26:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 24682 transitions. [2022-01-18 06:26:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:26:59,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:59,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:26:59,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:26:59,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:59,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:26:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 251639076, now seen corresponding path program 8 times [2022-01-18 06:26:59,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363459903] [2022-01-18 06:26:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:59,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:59,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363459903] [2022-01-18 06:26:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363459903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787685465] [2022-01-18 06:26:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:26:59,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:27:00,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:27:00,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:27:00,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:27:00,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:27:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:27:00,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:27:00,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:27:00,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:00,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 142 [2022-01-18 06:27:00,609 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:27:00,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 93 [2022-01-18 06:27:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:01,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:27:01,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:01,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 06:27:01,799 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 06:27:01,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 130 [2022-01-18 06:27:01,829 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-01-18 06:27:01,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 127 [2022-01-18 06:27:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:02,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787685465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:27:02,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:27:02,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 06:27:02,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691563154] [2022-01-18 06:27:02,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:27:02,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:27:02,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:27:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:27:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:27:02,477 INFO L87 Difference]: Start difference. First operand 7942 states and 24682 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 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) [2022-01-18 06:27:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:27:08,450 INFO L93 Difference]: Finished difference Result 20315 states and 62151 transitions. [2022-01-18 06:27:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 06:27:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 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 42 [2022-01-18 06:27:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:27:08,498 INFO L225 Difference]: With dead ends: 20315 [2022-01-18 06:27:08,498 INFO L226 Difference]: Without dead ends: 17396 [2022-01-18 06:27:08,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3583, Invalid=13973, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 06:27:08,501 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1205 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:27:08,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1475 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:27:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17396 states. [2022-01-18 06:27:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17396 to 6922. [2022-01-18 06:27:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6921 states have (on average 3.072966334344748) internal successors, (21268), 6921 states have internal predecessors, (21268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 21268 transitions. [2022-01-18 06:27:08,745 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 21268 transitions. Word has length 42 [2022-01-18 06:27:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:27:08,745 INFO L470 AbstractCegarLoop]: Abstraction has 6922 states and 21268 transitions. [2022-01-18 06:27:08,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 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) [2022-01-18 06:27:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 21268 transitions. [2022-01-18 06:27:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:27:08,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:27:08,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:27:08,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 06:27:08,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:08,980 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:27:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:27:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2004363036, now seen corresponding path program 9 times [2022-01-18 06:27:08,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:27:08,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701673106] [2022-01-18 06:27:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:27:08,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:27:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:27:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:09,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:27:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701673106] [2022-01-18 06:27:09,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701673106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:27:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444036319] [2022-01-18 06:27:09,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:27:09,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:09,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:27:09,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:27:09,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:27:09,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:27:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:27:09,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:27:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:27:09,537 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:27:09,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:27:09,668 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:27:09,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 06:27:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:27:09,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:27:10,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:10,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2022-01-18 06:27:10,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:10,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:10,414 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-01-18 06:27:10,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 100 [2022-01-18 06:27:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:27:10,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444036319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:27:10,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:27:10,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 31 [2022-01-18 06:27:10,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739951345] [2022-01-18 06:27:10,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:27:10,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:27:10,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:27:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:27:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:27:10,535 INFO L87 Difference]: Start difference. First operand 6922 states and 21268 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 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) [2022-01-18 06:27:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:27:32,285 INFO L93 Difference]: Finished difference Result 35824 states and 108376 transitions. [2022-01-18 06:27:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-01-18 06:27:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 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 42 [2022-01-18 06:27:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:27:32,355 INFO L225 Difference]: With dead ends: 35824 [2022-01-18 06:27:32,355 INFO L226 Difference]: Without dead ends: 33657 [2022-01-18 06:27:32,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84786 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=32112, Invalid=127488, Unknown=0, NotChecked=0, Total=159600 [2022-01-18 06:27:32,365 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3017 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:27:32,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 1516 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 06:27:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33657 states. [2022-01-18 06:27:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33657 to 10798. [2022-01-18 06:27:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10798 states, 10797 states have (on average 3.137075113457442) internal successors, (33871), 10797 states have internal predecessors, (33871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10798 states to 10798 states and 33871 transitions. [2022-01-18 06:27:32,862 INFO L78 Accepts]: Start accepts. Automaton has 10798 states and 33871 transitions. Word has length 42 [2022-01-18 06:27:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:27:32,863 INFO L470 AbstractCegarLoop]: Abstraction has 10798 states and 33871 transitions. [2022-01-18 06:27:32,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 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) [2022-01-18 06:27:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10798 states and 33871 transitions. [2022-01-18 06:27:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 06:27:32,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:27:32,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:27:32,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:27:33,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 06:27:33,100 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:27:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:27:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1846831292, now seen corresponding path program 10 times [2022-01-18 06:27:33,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:27:33,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201428048] [2022-01-18 06:27:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:27:33,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:27:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:27:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:33,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:27:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201428048] [2022-01-18 06:27:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201428048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:27:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569757465] [2022-01-18 06:27:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:27:33,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:27:33,311 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:27:33,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:27:33,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:27:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:27:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:27:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:27:33,629 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:27:33,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:27:33,760 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:27:33,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 06:27:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:27:34,550 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 06:27:34,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 112 [2022-01-18 06:27:34,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:34,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 06:27:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:34,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569757465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:27:34,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:27:34,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-01-18 06:27:34,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642751533] [2022-01-18 06:27:34,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:27:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:27:34,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:27:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:27:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:27:34,667 INFO L87 Difference]: Start difference. First operand 10798 states and 33871 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:03,748 INFO L93 Difference]: Finished difference Result 27482 states and 83508 transitions. [2022-01-18 06:28:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-01-18 06:28:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 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 42 [2022-01-18 06:28:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:03,803 INFO L225 Difference]: With dead ends: 27482 [2022-01-18 06:28:03,803 INFO L226 Difference]: Without dead ends: 25101 [2022-01-18 06:28:03,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97579 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=31327, Invalid=165365, Unknown=0, NotChecked=0, Total=196692 [2022-01-18 06:28:03,813 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3310 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:03,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 1652 Invalid, 4656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 06:28:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25101 states. [2022-01-18 06:28:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25101 to 9862. [2022-01-18 06:28:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9862 states, 9861 states have (on average 3.1219957407970793) internal successors, (30786), 9861 states have internal predecessors, (30786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 30786 transitions. [2022-01-18 06:28:04,191 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 30786 transitions. Word has length 42 [2022-01-18 06:28:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:04,192 INFO L470 AbstractCegarLoop]: Abstraction has 9862 states and 30786 transitions. [2022-01-18 06:28:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 30786 transitions. [2022-01-18 06:28:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 06:28:04,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:04,212 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:28:04,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:28:04,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 06:28:04,428 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:28:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash -287176812, now seen corresponding path program 11 times [2022-01-18 06:28:04,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419732004] [2022-01-18 06:28:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:04,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:04,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:04,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419732004] [2022-01-18 06:28:04,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419732004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:04,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260633431] [2022-01-18 06:28:04,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:28:04,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:04,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:28:04,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:28:04,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 06:28:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 06:28:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:04,911 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:04,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:28:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:28:04,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:05,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:28:05,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 101 [2022-01-18 06:28:05,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:28:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:28:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260633431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:05,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 27 [2022-01-18 06:28:05,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663352015] [2022-01-18 06:28:05,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:05,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:28:05,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:28:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:28:05,248 INFO L87 Difference]: Start difference. First operand 9862 states and 30786 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 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) [2022-01-18 06:28:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:09,537 INFO L93 Difference]: Finished difference Result 40668 states and 122041 transitions. [2022-01-18 06:28:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 06:28:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 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 44 [2022-01-18 06:28:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:09,626 INFO L225 Difference]: With dead ends: 40668 [2022-01-18 06:28:09,626 INFO L226 Difference]: Without dead ends: 40275 [2022-01-18 06:28:09,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4220, Invalid=19036, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 06:28:09,629 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1676 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:09,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 1199 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:28:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40275 states. [2022-01-18 06:28:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40275 to 10540. [2022-01-18 06:28:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10540 states, 10539 states have (on average 3.0748647879305437) internal successors, (32406), 10539 states have internal predecessors, (32406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10540 states to 10540 states and 32406 transitions. [2022-01-18 06:28:10,187 INFO L78 Accepts]: Start accepts. Automaton has 10540 states and 32406 transitions. Word has length 44 [2022-01-18 06:28:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:10,188 INFO L470 AbstractCegarLoop]: Abstraction has 10540 states and 32406 transitions. [2022-01-18 06:28:10,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 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) [2022-01-18 06:28:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10540 states and 32406 transitions. [2022-01-18 06:28:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 06:28:10,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:10,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:28:10,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 06:28:10,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:28:10,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:28:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1178577320, now seen corresponding path program 12 times [2022-01-18 06:28:10,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:10,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487236836] [2022-01-18 06:28:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:10,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:10,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487236836] [2022-01-18 06:28:10,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487236836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482456523] [2022-01-18 06:28:10,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:28:10,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:10,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:28:10,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:28:10,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:28:10,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 06:28:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:11,022 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:11,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 74 [2022-01-18 06:28:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:28:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:28:11,135 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 06:28:11,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-01-18 06:28:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:28:11,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:11,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:28:11,461 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 06:28:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2022-01-18 06:28:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:28:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482456523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:11,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2022-01-18 06:28:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135637755] [2022-01-18 06:28:11,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:11,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:28:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:28:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:28:11,513 INFO L87 Difference]: Start difference. First operand 10540 states and 32406 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:29,156 INFO L93 Difference]: Finished difference Result 50637 states and 153811 transitions. [2022-01-18 06:28:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 424 states. [2022-01-18 06:28:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 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 44 [2022-01-18 06:28:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:29,262 INFO L225 Difference]: With dead ends: 50637 [2022-01-18 06:28:29,262 INFO L226 Difference]: Without dead ends: 46887 [2022-01-18 06:28:29,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95200 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=24936, Invalid=168224, Unknown=0, NotChecked=0, Total=193160 [2022-01-18 06:28:29,273 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 2585 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 4432 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 4432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:29,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 1306 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 4432 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 06:28:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46887 states. [2022-01-18 06:28:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46887 to 11459. [2022-01-18 06:28:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 11458 states have (on average 3.062925466922674) internal successors, (35095), 11458 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 35095 transitions. [2022-01-18 06:28:29,909 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 35095 transitions. Word has length 44 [2022-01-18 06:28:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:29,910 INFO L470 AbstractCegarLoop]: Abstraction has 11459 states and 35095 transitions. [2022-01-18 06:28:29,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 35095 transitions. [2022-01-18 06:28:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-18 06:28:29,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:29,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:28:29,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 06:28:30,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:28:30,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:28:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1670748072, now seen corresponding path program 13 times [2022-01-18 06:28:30,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548029784] [2022-01-18 06:28:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:30,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:28:30,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548029784] [2022-01-18 06:28:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548029784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762661322] [2022-01-18 06:28:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:28:30,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:30,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:28:30,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:28:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 06:28:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 06:28:30,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 06:28:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762661322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:30,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-01-18 06:28:30,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055550951] [2022-01-18 06:28:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:30,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:28:30,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:28:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:28:30,349 INFO L87 Difference]: Start difference. First operand 11459 states and 35095 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-01-18 06:28:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:30,455 INFO L93 Difference]: Finished difference Result 25716 states and 78317 transitions. [2022-01-18 06:28:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:28:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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 46 [2022-01-18 06:28:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:30,508 INFO L225 Difference]: With dead ends: 25716 [2022-01-18 06:28:30,508 INFO L226 Difference]: Without dead ends: 25682 [2022-01-18 06:28:30,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:28:30,509 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:30,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:28:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-01-18 06:28:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 22310. [2022-01-18 06:28:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 22309 states have (on average 3.1084315747007936) internal successors, (69346), 22309 states have internal predecessors, (69346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 69346 transitions. [2022-01-18 06:28:31,021 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 69346 transitions. Word has length 46 [2022-01-18 06:28:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:31,021 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 69346 transitions. [2022-01-18 06:28:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-01-18 06:28:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 69346 transitions. [2022-01-18 06:28:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 06:28:31,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:31,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:28:31,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 06:28:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 06:28:31,255 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:28:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 912464441, now seen corresponding path program 14 times [2022-01-18 06:28:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391467445] [2022-01-18 06:28:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:31,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:28:31,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391467445] [2022-01-18 06:28:31,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391467445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871032286] [2022-01-18 06:28:31,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:28:31,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:31,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:31,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:28:31,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:28:31,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:28:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:28:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:31,924 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:31,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:28:32,140 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:32,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:28:32,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:28:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:28:32,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:32,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:28:32,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 06:28:32,987 INFO L353 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2022-01-18 06:28:32,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-01-18 06:28:32,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:28:32,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 06:28:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:28:33,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871032286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:33,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:33,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-01-18 06:28:33,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927914376] [2022-01-18 06:28:33,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:33,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 06:28:33,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 06:28:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:28:33,357 INFO L87 Difference]: Start difference. First operand 22310 states and 69346 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 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) [2022-01-18 06:28:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:40,395 INFO L93 Difference]: Finished difference Result 58363 states and 177073 transitions. [2022-01-18 06:28:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-18 06:28:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 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 47 [2022-01-18 06:28:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:40,521 INFO L225 Difference]: With dead ends: 58363 [2022-01-18 06:28:40,521 INFO L226 Difference]: Without dead ends: 51234 [2022-01-18 06:28:40,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10776 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5550, Invalid=23180, Unknown=0, NotChecked=0, Total=28730 [2022-01-18 06:28:40,523 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 2375 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:40,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 1291 Invalid, 4105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:28:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51234 states. [2022-01-18 06:28:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51234 to 25797. [2022-01-18 06:28:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25797 states, 25796 states have (on average 3.0408590479144055) internal successors, (78442), 25796 states have internal predecessors, (78442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25797 states to 25797 states and 78442 transitions. [2022-01-18 06:28:41,436 INFO L78 Accepts]: Start accepts. Automaton has 25797 states and 78442 transitions. Word has length 47 [2022-01-18 06:28:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:41,436 INFO L470 AbstractCegarLoop]: Abstraction has 25797 states and 78442 transitions. [2022-01-18 06:28:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 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) [2022-01-18 06:28:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25797 states and 78442 transitions. [2022-01-18 06:28:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 06:28:41,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:41,484 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:28:41,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 06:28:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 06:28:41,707 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:28:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 189048965, now seen corresponding path program 15 times [2022-01-18 06:28:41,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:41,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316172708] [2022-01-18 06:28:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:41,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:28:41,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:41,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316172708] [2022-01-18 06:28:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316172708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:41,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146078731] [2022-01-18 06:28:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:28:41,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:41,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:28:41,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:28:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:28:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:28:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:42,756 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:42,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2022-01-18 06:28:43,216 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:28:43,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 83 [2022-01-18 06:28:43,669 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:28:43,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:28:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:28:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:44,831 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:28:44,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-01-18 06:28:45,388 INFO L353 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-01-18 06:28:45,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 180 [2022-01-18 06:28:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:28:45,425 INFO L353 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-01-18 06:28:45,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 155 [2022-01-18 06:28:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:28:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146078731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:46,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:46,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 19] total 48 [2022-01-18 06:28:46,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125458200] [2022-01-18 06:28:46,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:46,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:28:46,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:28:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:28:46,102 INFO L87 Difference]: Start difference. First operand 25797 states and 78442 transitions. Second operand has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 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) [2022-01-18 06:29:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:02,840 INFO L93 Difference]: Finished difference Result 97112 states and 293648 transitions. [2022-01-18 06:29:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-18 06:29:02,840 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 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 49 [2022-01-18 06:29:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:03,065 INFO L225 Difference]: With dead ends: 97112 [2022-01-18 06:29:03,065 INFO L226 Difference]: Without dead ends: 84220 [2022-01-18 06:29:03,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27915 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=16169, Invalid=40713, Unknown=0, NotChecked=0, Total=56882 [2022-01-18 06:29:03,068 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1820 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 5035 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:03,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2100 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5035 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-18 06:29:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84220 states. [2022-01-18 06:29:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84220 to 33391. [2022-01-18 06:29:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33391 states, 33390 states have (on average 3.055944893680743) internal successors, (102038), 33390 states have internal predecessors, (102038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33391 states to 33391 states and 102038 transitions. [2022-01-18 06:29:04,460 INFO L78 Accepts]: Start accepts. Automaton has 33391 states and 102038 transitions. Word has length 49 [2022-01-18 06:29:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:04,460 INFO L470 AbstractCegarLoop]: Abstraction has 33391 states and 102038 transitions. [2022-01-18 06:29:04,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 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) [2022-01-18 06:29:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33391 states and 102038 transitions. [2022-01-18 06:29:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 06:29:04,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:04,518 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:29:04,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:29:04,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:04,719 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:29:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1519631584, now seen corresponding path program 16 times [2022-01-18 06:29:04,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:04,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924410024] [2022-01-18 06:29:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:04,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:05,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:05,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924410024] [2022-01-18 06:29:05,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924410024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:05,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208139277] [2022-01-18 06:29:05,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:29:05,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:05,175 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:29:05,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:29:05,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:29:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:29:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 06:29:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:05,450 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:29:05,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-18 06:29:05,537 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:29:05,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:29:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 06:29:05,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:05,976 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:29:05,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 120 [2022-01-18 06:29:05,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:29:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 06:29:06,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208139277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:06,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:06,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 32 [2022-01-18 06:29:06,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961153796] [2022-01-18 06:29:06,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:06,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:29:06,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:29:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:29:06,159 INFO L87 Difference]: Start difference. First operand 33391 states and 102038 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 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) [2022-01-18 06:29:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:14,282 INFO L93 Difference]: Finished difference Result 131426 states and 404962 transitions. [2022-01-18 06:29:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-18 06:29:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 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 50 [2022-01-18 06:29:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:14,839 INFO L225 Difference]: With dead ends: 131426 [2022-01-18 06:29:14,839 INFO L226 Difference]: Without dead ends: 114464 [2022-01-18 06:29:14,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8414, Invalid=35058, Unknown=0, NotChecked=0, Total=43472 [2022-01-18 06:29:14,842 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1640 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:14,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 1257 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 06:29:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114464 states. [2022-01-18 06:29:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114464 to 44522. [2022-01-18 06:29:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.0804564138271826) internal successors, (137145), 44521 states have internal predecessors, (137145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 137145 transitions. [2022-01-18 06:29:16,372 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 137145 transitions. Word has length 50 [2022-01-18 06:29:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:16,372 INFO L470 AbstractCegarLoop]: Abstraction has 44522 states and 137145 transitions. [2022-01-18 06:29:16,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 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) [2022-01-18 06:29:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 137145 transitions. [2022-01-18 06:29:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:29:16,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:16,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:29:16,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:29:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:16,863 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:29:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -867515449, now seen corresponding path program 17 times [2022-01-18 06:29:16,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092347342] [2022-01-18 06:29:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:16,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 06:29:16,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092347342] [2022-01-18 06:29:16,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092347342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779345287] [2022-01-18 06:29:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:29:16,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:16,905 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:29:16,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:29:16,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 06:29:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:29:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:29:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:29:16,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 06:29:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 06:29:17,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:17,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:17,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 90 [2022-01-18 06:29:17,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:29:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 06:29:17,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779345287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:17,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:17,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-01-18 06:29:17,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597686836] [2022-01-18 06:29:17,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:17,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:29:17,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:29:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:29:17,223 INFO L87 Difference]: Start difference. First operand 44522 states and 137145 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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) [2022-01-18 06:29:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:17,684 INFO L93 Difference]: Finished difference Result 53825 states and 165071 transitions. [2022-01-18 06:29:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:29:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 51 [2022-01-18 06:29:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:17,814 INFO L225 Difference]: With dead ends: 53825 [2022-01-18 06:29:17,814 INFO L226 Difference]: Without dead ends: 53723 [2022-01-18 06:29:17,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:29:17,815 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:17,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 159 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:29:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53723 states. [2022-01-18 06:29:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53723 to 51223. [2022-01-18 06:29:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51223 states, 51222 states have (on average 3.0916403108039514) internal successors, (158360), 51222 states have internal predecessors, (158360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51223 states to 51223 states and 158360 transitions. [2022-01-18 06:29:19,066 INFO L78 Accepts]: Start accepts. Automaton has 51223 states and 158360 transitions. Word has length 51 [2022-01-18 06:29:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 51223 states and 158360 transitions. [2022-01-18 06:29:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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) [2022-01-18 06:29:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 51223 states and 158360 transitions. [2022-01-18 06:29:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:29:19,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:19,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:29:19,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:29:19,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:19,358 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:29:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1449455409, now seen corresponding path program 18 times [2022-01-18 06:29:19,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:19,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750076905] [2022-01-18 06:29:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:19,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:19,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750076905] [2022-01-18 06:29:19,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750076905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348418618] [2022-01-18 06:29:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:29:19,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:19,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:19,942 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:29:19,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:29:19,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 06:29:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:29:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:29:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:20,162 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 06:29:20,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 06:29:20,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:29:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:29:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:20,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:20,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 06:29:20,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:20,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 121 [2022-01-18 06:29:20,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:29:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:29:20,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348418618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:20,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:20,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 33 [2022-01-18 06:29:20,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785962553] [2022-01-18 06:29:20,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 06:29:20,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 06:29:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:29:20,843 INFO L87 Difference]: Start difference. First operand 51223 states and 158360 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 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) [2022-01-18 06:29:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:53,560 INFO L93 Difference]: Finished difference Result 170953 states and 518659 transitions. [2022-01-18 06:29:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 648 states. [2022-01-18 06:29:53,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 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 51 [2022-01-18 06:29:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:54,308 INFO L225 Difference]: With dead ends: 170953 [2022-01-18 06:29:54,309 INFO L226 Difference]: Without dead ends: 168633 [2022-01-18 06:29:54,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213233 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=40465, Invalid=403757, Unknown=0, NotChecked=0, Total=444222 [2022-01-18 06:29:54,323 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2139 mSDsluCounter, 8948 mSDsCounter, 0 mSdLazyCounter, 11527 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 7126 SdHoareTripleChecker+Invalid, 12145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 11527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:54,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 7126 Invalid, 12145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 11527 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-18 06:29:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168633 states. [2022-01-18 06:29:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168633 to 80389. [2022-01-18 06:29:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80389 states, 80388 states have (on average 3.1265984972881524) internal successors, (251341), 80388 states have internal predecessors, (251341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80389 states to 80389 states and 251341 transitions. [2022-01-18 06:29:57,182 INFO L78 Accepts]: Start accepts. Automaton has 80389 states and 251341 transitions. Word has length 51 [2022-01-18 06:29:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:57,183 INFO L470 AbstractCegarLoop]: Abstraction has 80389 states and 251341 transitions. [2022-01-18 06:29:57,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 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) [2022-01-18 06:29:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 80389 states and 251341 transitions. [2022-01-18 06:29:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:29:57,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:57,323 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:29:57,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:29:57,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:57,527 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:29:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 786519139, now seen corresponding path program 19 times [2022-01-18 06:29:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:57,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472515498] [2022-01-18 06:29:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:57,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:57,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472515498] [2022-01-18 06:29:57,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472515498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714273869] [2022-01-18 06:29:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:29:57,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:57,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:29:57,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:29:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:29:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:58,309 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 06:29:58,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 06:29:58,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:29:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:29:58,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:58,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:58,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 06:29:58,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:29:58,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:58,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 107 [2022-01-18 06:29:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:29:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714273869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:58,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:58,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 32 [2022-01-18 06:29:58,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635383585] [2022-01-18 06:29:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:58,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:29:58,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:29:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:29:58,844 INFO L87 Difference]: Start difference. First operand 80389 states and 251341 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 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) [2022-01-18 06:30:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:04,315 INFO L93 Difference]: Finished difference Result 130022 states and 401479 transitions. [2022-01-18 06:30:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 06:30:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 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 51 [2022-01-18 06:30:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:30:04,964 INFO L225 Difference]: With dead ends: 130022 [2022-01-18 06:30:04,964 INFO L226 Difference]: Without dead ends: 128613 [2022-01-18 06:30:04,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7970 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2148, Invalid=21108, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 06:30:04,965 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1051 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:30:04,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1555 Invalid, 3561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:30:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128613 states. [2022-01-18 06:30:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128613 to 82939. [2022-01-18 06:30:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82939 states, 82938 states have (on average 3.098278231932287) internal successors, (256965), 82938 states have internal predecessors, (256965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82939 states to 82939 states and 256965 transitions. [2022-01-18 06:30:07,503 INFO L78 Accepts]: Start accepts. Automaton has 82939 states and 256965 transitions. Word has length 51 [2022-01-18 06:30:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 82939 states and 256965 transitions. [2022-01-18 06:30:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 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) [2022-01-18 06:30:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 82939 states and 256965 transitions. [2022-01-18 06:30:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:30:07,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:07,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:30:07,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:30:07,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:07,864 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:30:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 931116739, now seen corresponding path program 20 times [2022-01-18 06:30:07,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:07,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001355173] [2022-01-18 06:30:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:08,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001355173] [2022-01-18 06:30:08,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001355173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210396031] [2022-01-18 06:30:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:30:08,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:08,110 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:30:08,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:30:08,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:30:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:30:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:30:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:08,349 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:30:08,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:30:08,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 06:30:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:08,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:08,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:08,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 06:30:08,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:08,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 109 [2022-01-18 06:30:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:30:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:08,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210396031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:08,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:08,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-01-18 06:30:08,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884478587] [2022-01-18 06:30:08,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:08,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:30:08,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:30:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:30:08,844 INFO L87 Difference]: Start difference. First operand 82939 states and 256965 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:11,137 INFO L93 Difference]: Finished difference Result 139406 states and 427719 transitions. [2022-01-18 06:30:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:30:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-01-18 06:30:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:30:11,851 INFO L225 Difference]: With dead ends: 139406 [2022-01-18 06:30:11,851 INFO L226 Difference]: Without dead ends: 138710 [2022-01-18 06:30:11,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=3328, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:30:11,852 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 440 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:30:11,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1085 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:30:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138710 states. [2022-01-18 06:30:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138710 to 83027. [2022-01-18 06:30:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83027 states, 83026 states have (on average 3.0981258882759617) internal successors, (257225), 83026 states have internal predecessors, (257225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83027 states to 83027 states and 257225 transitions. [2022-01-18 06:30:14,478 INFO L78 Accepts]: Start accepts. Automaton has 83027 states and 257225 transitions. Word has length 51 [2022-01-18 06:30:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:14,478 INFO L470 AbstractCegarLoop]: Abstraction has 83027 states and 257225 transitions. [2022-01-18 06:30:14,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 83027 states and 257225 transitions. [2022-01-18 06:30:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:30:14,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:14,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:30:14,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:30:14,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:14,825 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:30:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 741648217, now seen corresponding path program 21 times [2022-01-18 06:30:14,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456820181] [2022-01-18 06:30:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:14,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 06:30:14,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456820181] [2022-01-18 06:30:14,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456820181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152476430] [2022-01-18 06:30:14,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:30:14,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:14,939 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:30:14,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:30:14,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 06:30:14,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:30:14,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:30:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:15,178 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:30:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:30:15,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 06:30:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:15,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:15,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:15,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 06:30:15,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:15,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 112 [2022-01-18 06:30:15,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:30:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:15,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152476430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:15,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:15,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-01-18 06:30:15,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370319034] [2022-01-18 06:30:15,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:15,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:30:15,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:15,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:30:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:30:15,847 INFO L87 Difference]: Start difference. First operand 83027 states and 257225 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:25,365 INFO L93 Difference]: Finished difference Result 197704 states and 595244 transitions. [2022-01-18 06:30:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-01-18 06:30:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2022-01-18 06:30:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:30:26,263 INFO L225 Difference]: With dead ends: 197704 [2022-01-18 06:30:26,263 INFO L226 Difference]: Without dead ends: 193845 [2022-01-18 06:30:26,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32872 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8079, Invalid=68373, Unknown=0, NotChecked=0, Total=76452 [2022-01-18 06:30:26,266 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1817 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 6238 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 6238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:30:26,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 2594 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 6238 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 06:30:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193845 states. [2022-01-18 06:30:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193845 to 79515. [2022-01-18 06:30:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79515 states, 79514 states have (on average 3.0640390371506903) internal successors, (243634), 79514 states have internal predecessors, (243634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79515 states to 79515 states and 243634 transitions. [2022-01-18 06:30:29,529 INFO L78 Accepts]: Start accepts. Automaton has 79515 states and 243634 transitions. Word has length 51 [2022-01-18 06:30:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:29,529 INFO L470 AbstractCegarLoop]: Abstraction has 79515 states and 243634 transitions. [2022-01-18 06:30:29,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 79515 states and 243634 transitions. [2022-01-18 06:30:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:30:29,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:29,669 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:30:29,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-18 06:30:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 06:30:29,869 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:30:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -944128953, now seen corresponding path program 22 times [2022-01-18 06:30:29,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030995766] [2022-01-18 06:30:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:29,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:30,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030995766] [2022-01-18 06:30:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030995766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109622445] [2022-01-18 06:30:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:30:30,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:30,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:30:30,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:30:30,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:30:30,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:30:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:30:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:30,489 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:30:30,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 06:30:30,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:30:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:30,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:30,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:30,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 06:30:30,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:30,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 109 [2022-01-18 06:30:30,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:30:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:30:31,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109622445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:31,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:31,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 35 [2022-01-18 06:30:31,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112273608] [2022-01-18 06:30:31,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:31,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:30:31,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:30:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:30:31,064 INFO L87 Difference]: Start difference. First operand 79515 states and 243634 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:46,696 INFO L93 Difference]: Finished difference Result 144721 states and 440668 transitions. [2022-01-18 06:30:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 355 states. [2022-01-18 06:30:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2022-01-18 06:30:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:30:47,108 INFO L225 Difference]: With dead ends: 144721 [2022-01-18 06:30:47,108 INFO L226 Difference]: Without dead ends: 143470 [2022-01-18 06:30:47,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64962 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=13480, Invalid=132826, Unknown=0, NotChecked=0, Total=146306 [2022-01-18 06:30:47,114 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1670 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 7848 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 8385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 7848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:30:47,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 3057 Invalid, 8385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 7848 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-18 06:30:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143470 states. [2022-01-18 06:30:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143470 to 69347. [2022-01-18 06:30:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69347 states, 69346 states have (on average 3.0609840509906845) internal successors, (212267), 69346 states have internal predecessors, (212267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69347 states to 69347 states and 212267 transitions. [2022-01-18 06:30:49,763 INFO L78 Accepts]: Start accepts. Automaton has 69347 states and 212267 transitions. Word has length 55 [2022-01-18 06:30:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:49,764 INFO L470 AbstractCegarLoop]: Abstraction has 69347 states and 212267 transitions. [2022-01-18 06:30:49,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 69347 states and 212267 transitions. [2022-01-18 06:30:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 06:30:49,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:49,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:30:49,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:30:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 06:30:50,090 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:30:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -332459897, now seen corresponding path program 23 times [2022-01-18 06:30:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215438789] [2022-01-18 06:30:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:50,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:30:50,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:50,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215438789] [2022-01-18 06:30:50,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215438789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:50,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358309118] [2022-01-18 06:30:50,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:30:50,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:50,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:30:50,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:30:50,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 06:30:50,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:30:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 06:30:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:50,628 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-18 06:30:50,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 06:30:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:30:50,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:50,962 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 06:30:50,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 105 [2022-01-18 06:30:50,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:30:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:30:51,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358309118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:51,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:51,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 30 [2022-01-18 06:30:51,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126223520] [2022-01-18 06:30:51,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:51,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:30:51,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:30:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:30:51,051 INFO L87 Difference]: Start difference. First operand 69347 states and 212267 transitions. Second operand has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:59,740 INFO L93 Difference]: Finished difference Result 242363 states and 739180 transitions. [2022-01-18 06:30:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-18 06:30:59,740 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 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 56 [2022-01-18 06:30:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:00,576 INFO L225 Difference]: With dead ends: 242363 [2022-01-18 06:31:00,576 INFO L226 Difference]: Without dead ends: 234109 [2022-01-18 06:31:00,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17601 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8221, Invalid=29999, Unknown=0, NotChecked=0, Total=38220 [2022-01-18 06:31:00,578 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1950 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:00,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1950 Valid, 1640 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:31:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234109 states. [2022-01-18 06:31:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234109 to 120881. [2022-01-18 06:31:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120881 states, 120880 states have (on average 3.071657842488418) internal successors, (371302), 120880 states have internal predecessors, (371302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120881 states to 120881 states and 371302 transitions. [2022-01-18 06:31:05,204 INFO L78 Accepts]: Start accepts. Automaton has 120881 states and 371302 transitions. Word has length 56 [2022-01-18 06:31:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:05,204 INFO L470 AbstractCegarLoop]: Abstraction has 120881 states and 371302 transitions. [2022-01-18 06:31:05,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 120881 states and 371302 transitions. [2022-01-18 06:31:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 06:31:05,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:05,418 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:05,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:31:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 06:31:05,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:31:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1980953451, now seen corresponding path program 24 times [2022-01-18 06:31:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239709490] [2022-01-18 06:31:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:05,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:31:05,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239709490] [2022-01-18 06:31:05,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239709490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433448484] [2022-01-18 06:31:05,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:31:05,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:05,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:05,761 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:31:05,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:31:05,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 06:31:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:31:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:31:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:06,246 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:31:06,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 92 [2022-01-18 06:31:06,385 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:31:06,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:31:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:31:06,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:07,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:31:07,412 INFO L353 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2022-01-18 06:31:07,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 110 [2022-01-18 06:31:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:31:07,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433448484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:07,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:07,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2022-01-18 06:31:07,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480238565] [2022-01-18 06:31:07,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:07,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:31:07,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:31:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:31:07,501 INFO L87 Difference]: Start difference. First operand 120881 states and 371302 transitions. Second operand has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 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) [2022-01-18 06:31:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:15,463 INFO L93 Difference]: Finished difference Result 414058 states and 1277939 transitions. [2022-01-18 06:31:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 06:31:15,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 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 56 [2022-01-18 06:31:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:17,328 INFO L225 Difference]: With dead ends: 414058 [2022-01-18 06:31:17,328 INFO L226 Difference]: Without dead ends: 414058 [2022-01-18 06:31:17,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11922 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5874, Invalid=20858, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 06:31:17,330 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1773 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:17,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1546 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:31:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414058 states. [2022-01-18 06:31:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414058 to 213658. [2022-01-18 06:31:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213658 states, 213657 states have (on average 3.151158164721961) internal successors, (673267), 213657 states have internal predecessors, (673267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213658 states to 213658 states and 673267 transitions. [2022-01-18 06:31:26,781 INFO L78 Accepts]: Start accepts. Automaton has 213658 states and 673267 transitions. Word has length 56 [2022-01-18 06:31:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:26,781 INFO L470 AbstractCegarLoop]: Abstraction has 213658 states and 673267 transitions. [2022-01-18 06:31:26,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 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) [2022-01-18 06:31:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 213658 states and 673267 transitions. [2022-01-18 06:31:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-18 06:31:27,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:27,907 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:27,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:31:28,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:28,108 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:31:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1483575497, now seen corresponding path program 25 times [2022-01-18 06:31:28,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:28,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203443733] [2022-01-18 06:31:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:28,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:31:28,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203443733] [2022-01-18 06:31:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203443733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587604104] [2022-01-18 06:31:28,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:31:28,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:28,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:28,439 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:31:28,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:31:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 06:31:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:28,792 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:31:28,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 06:31:28,998 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:31:28,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:31:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:31:29,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:29,652 INFO L353 Elim1Store]: treesize reduction 58, result has 44.8 percent of original size [2022-01-18 06:31:29,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 145 [2022-01-18 06:31:29,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:31:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:31:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587604104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:29,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2022-01-18 06:31:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176482376] [2022-01-18 06:31:29,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:29,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:31:29,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:31:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:31:29,995 INFO L87 Difference]: Start difference. First operand 213658 states and 673267 transitions. Second operand has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:09,122 INFO L93 Difference]: Finished difference Result 687845 states and 2146853 transitions. [2022-01-18 06:32:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2022-01-18 06:32:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 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 58 [2022-01-18 06:32:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:12,122 INFO L225 Difference]: With dead ends: 687845 [2022-01-18 06:32:12,122 INFO L226 Difference]: Without dead ends: 655736 [2022-01-18 06:32:12,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223493 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=52945, Invalid=389945, Unknown=0, NotChecked=0, Total=442890 [2022-01-18 06:32:12,135 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2583 mSDsluCounter, 3618 mSDsCounter, 0 mSdLazyCounter, 6733 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 6733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:12,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2583 Valid, 2645 Invalid, 7569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 6733 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-18 06:32:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655736 states. [2022-01-18 06:32:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655736 to 253244. [2022-01-18 06:32:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253244 states, 253243 states have (on average 3.1467720726732824) internal successors, (796898), 253243 states have internal predecessors, (796898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253244 states to 253244 states and 796898 transitions. [2022-01-18 06:32:26,860 INFO L78 Accepts]: Start accepts. Automaton has 253244 states and 796898 transitions. Word has length 58 [2022-01-18 06:32:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 253244 states and 796898 transitions. [2022-01-18 06:32:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 253244 states and 796898 transitions. [2022-01-18 06:32:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-18 06:32:27,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:27,334 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:27,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:27,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:32:27,535 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:32:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 393506375, now seen corresponding path program 26 times [2022-01-18 06:32:27,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072567319] [2022-01-18 06:32:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:27,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:32:28,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:28,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072567319] [2022-01-18 06:32:28,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072567319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:28,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102616675] [2022-01-18 06:32:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:32:28,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:28,130 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:28,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:32:28,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:32:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 06:32:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:28,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 06:32:30,716 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-01-18 06:32:30,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 203 [2022-01-18 06:32:30,724 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-01-18 06:32:30,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 129 [2022-01-18 06:32:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:32:30,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:33,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:32:33,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 06:32:34,127 INFO L353 Elim1Store]: treesize reduction 224, result has 24.1 percent of original size [2022-01-18 06:32:34,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 333 [2022-01-18 06:32:34,204 INFO L353 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2022-01-18 06:32:34,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 271 treesize of output 271 [2022-01-18 06:32:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:32:40,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102616675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:40,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:40,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:32:40,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081996558] [2022-01-18 06:32:40,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:40,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:32:40,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:32:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1847, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:32:40,527 INFO L87 Difference]: Start difference. First operand 253244 states and 796898 transitions. Second operand has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:50,111 INFO L93 Difference]: Finished difference Result 533549 states and 1682724 transitions. [2022-01-18 06:32:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:32:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 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 60 [2022-01-18 06:32:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:52,928 INFO L225 Difference]: With dead ends: 533549 [2022-01-18 06:32:52,928 INFO L226 Difference]: Without dead ends: 514642 [2022-01-18 06:32:52,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4431 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2850, Invalid=9140, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 06:32:52,929 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1494 mSDsluCounter, 3412 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2772 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 06:32:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514642 states. [2022-01-18 06:33:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514642 to 269198. [2022-01-18 06:33:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269198 states, 269197 states have (on average 3.1812241592588326) internal successors, (856376), 269197 states have internal predecessors, (856376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269198 states to 269198 states and 856376 transitions. [2022-01-18 06:33:03,284 INFO L78 Accepts]: Start accepts. Automaton has 269198 states and 856376 transitions. Word has length 60 [2022-01-18 06:33:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:03,284 INFO L470 AbstractCegarLoop]: Abstraction has 269198 states and 856376 transitions. [2022-01-18 06:33:03,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 269198 states and 856376 transitions. [2022-01-18 06:33:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:33:03,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:03,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:03,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:03,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:33:03,990 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:33:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash -925999780, now seen corresponding path program 27 times [2022-01-18 06:33:03,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072512273] [2022-01-18 06:33:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:03,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:33:04,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072512273] [2022-01-18 06:33:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072512273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407027094] [2022-01-18 06:33:04,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:33:04,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:04,338 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:04,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:33:04,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 06:33:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:33:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:05,044 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:33:05,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 94 [2022-01-18 06:33:05,184 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:33:05,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:33:05,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:33:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:33:05,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:05,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:33:05,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 06:33:06,451 INFO L353 Elim1Store]: treesize reduction 26, result has 57.4 percent of original size [2022-01-18 06:33:06,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 125 [2022-01-18 06:33:06,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 06:33:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 73 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:33:06,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407027094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:06,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:06,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 43 [2022-01-18 06:33:06,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187333382] [2022-01-18 06:33:06,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:06,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:33:06,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:06,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:33:06,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:33:06,626 INFO L87 Difference]: Start difference. First operand 269198 states and 856376 transitions. Second operand has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:52,923 INFO L93 Difference]: Finished difference Result 1067781 states and 3316648 transitions. [2022-01-18 06:33:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 787 states. [2022-01-18 06:33:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 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 [2022-01-18 06:33:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:59,150 INFO L225 Difference]: With dead ends: 1067781 [2022-01-18 06:33:59,151 INFO L226 Difference]: Without dead ends: 1046327 [2022-01-18 06:33:59,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302870 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=34104, Invalid=603498, Unknown=0, NotChecked=0, Total=637602 [2022-01-18 06:33:59,178 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 3684 mSDsluCounter, 13789 mSDsCounter, 0 mSdLazyCounter, 13820 mSolverCounterSat, 1444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3684 SdHoareTripleChecker+Valid, 11790 SdHoareTripleChecker+Invalid, 15264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1444 IncrementalHoareTripleChecker+Valid, 13820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:59,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3684 Valid, 11790 Invalid, 15264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1444 Valid, 13820 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-18 06:34:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046327 states. [2022-01-18 06:34:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046327 to 483292. [2022-01-18 06:34:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483292 states, 483291 states have (on average 3.199956134088986) internal successors, (1546510), 483291 states have internal predecessors, (1546510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483292 states to 483292 states and 1546510 transitions. [2022-01-18 06:34:29,308 INFO L78 Accepts]: Start accepts. Automaton has 483292 states and 1546510 transitions. Word has length 61 [2022-01-18 06:34:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:29,308 INFO L470 AbstractCegarLoop]: Abstraction has 483292 states and 1546510 transitions. [2022-01-18 06:34:29,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 483292 states and 1546510 transitions. [2022-01-18 06:34:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:34:31,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:31,498 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:31,719 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:34:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1239501488, now seen corresponding path program 28 times [2022-01-18 06:34:31,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875881884] [2022-01-18 06:34:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:31,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:34:32,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875881884] [2022-01-18 06:34:32,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875881884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994411592] [2022-01-18 06:34:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:34:32,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:32,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:32,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:34:32,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:34:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-18 06:34:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:33,476 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:34:33,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:34:34,198 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-01-18 06:34:34,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 190 [2022-01-18 06:34:34,224 INFO L353 Elim1Store]: treesize reduction 93, result has 11.4 percent of original size [2022-01-18 06:34:34,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 191 [2022-01-18 06:34:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:34:34,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:36,758 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:34:36,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 72 [2022-01-18 06:34:37,728 INFO L353 Elim1Store]: treesize reduction 86, result has 43.0 percent of original size [2022-01-18 06:34:37,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 253 treesize of output 283 [2022-01-18 06:34:37,840 INFO L353 Elim1Store]: treesize reduction 118, result has 45.6 percent of original size [2022-01-18 06:34:37,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 274 [2022-01-18 06:35:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:35:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994411592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:12,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:12,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2022-01-18 06:35:12,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331681328] [2022-01-18 06:35:12,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:12,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 06:35:12,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 06:35:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 06:35:12,805 INFO L87 Difference]: Start difference. First operand 483292 states and 1546510 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:53,193 INFO L93 Difference]: Finished difference Result 968722 states and 3055036 transitions. [2022-01-18 06:35:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-01-18 06:35:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2022-01-18 06:35:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:59,324 INFO L225 Difference]: With dead ends: 968722 [2022-01-18 06:35:59,324 INFO L226 Difference]: Without dead ends: 940187 [2022-01-18 06:35:59,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41896 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=12613, Invalid=90749, Unknown=0, NotChecked=0, Total=103362 [2022-01-18 06:35:59,340 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 1794 mSDsluCounter, 6390 mSDsCounter, 0 mSdLazyCounter, 9391 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 9937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 9391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:59,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 5338 Invalid, 9937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 9391 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-18 06:36:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940187 states. [2022-01-18 06:36:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940187 to 598862. [2022-01-18 06:36:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598862 states, 598861 states have (on average 3.176900816717068) internal successors, (1902522), 598861 states have internal predecessors, (1902522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598862 states to 598862 states and 1902522 transitions. [2022-01-18 06:36:24,888 INFO L78 Accepts]: Start accepts. Automaton has 598862 states and 1902522 transitions. Word has length 61 [2022-01-18 06:36:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:24,888 INFO L470 AbstractCegarLoop]: Abstraction has 598862 states and 1902522 transitions. [2022-01-18 06:36:24,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 598862 states and 1902522 transitions. [2022-01-18 06:36:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:36:26,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:26,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:26,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:27,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:27,104 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -720227254, now seen corresponding path program 29 times [2022-01-18 06:36:27,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323287357] [2022-01-18 06:36:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:27,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:36:27,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323287357] [2022-01-18 06:36:27,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323287357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480074298] [2022-01-18 06:36:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:27,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:27,882 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:36:27,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:36:27,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 06:36:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 06:36:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:28,846 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:36:28,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 107 [2022-01-18 06:36:28,941 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-18 06:36:28,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 06:36:29,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:36:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:36:29,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:29,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:29,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 06:36:30,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 06:36:30,820 INFO L353 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2022-01-18 06:36:30,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 172 [2022-01-18 06:36:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:36:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480074298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:31,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:31,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2022-01-18 06:36:31,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823591084] [2022-01-18 06:36:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:31,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-18 06:36:31,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-18 06:36:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:36:31,524 INFO L87 Difference]: Start difference. First operand 598862 states and 1902522 transitions. Second operand has 54 states, 54 states have (on average 2.814814814814815) internal successors, (152), 53 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) Received shutdown request... [2022-01-18 06:37:18,940 WARN L244 SmtUtils]: Removed 12 from assertion stack [2022-01-18 06:37:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 635 states. [2022-01-18 06:37:18,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209086 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=35351, Invalid=422301, Unknown=0, NotChecked=0, Total=457652 [2022-01-18 06:37:18,956 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 2553 mSDsluCounter, 3913 mSDsCounter, 0 mSdLazyCounter, 13253 mSolverCounterSat, 1067 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2553 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 14320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1067 IncrementalHoareTripleChecker+Valid, 13253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:18,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2553 Valid, 3194 Invalid, 14320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1067 Valid, 13253 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-01-18 06:37:18,959 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 06:37:18,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:37:18,976 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:37:18,977 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:37:19,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:19,160 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (598862states) and FLOYD_HOARE automaton (currently 635 states, 54 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 55ms.. [2022-01-18 06:37:19,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 06:37:19,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 06:37:19,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 06:37:19,164 INFO L732 BasicCegarLoop]: Path program histogram: [29, 1, 1, 1] [2022-01-18 06:37:19,174 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:37:19,174 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:37:19,176 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:37:19 BasicIcfg [2022-01-18 06:37:19,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:37:19,176 INFO L158 Benchmark]: Toolchain (without parser) took 669648.89ms. Allocated memory was 377.5MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 338.1MB in the beginning and 9.9GB in the end (delta: -9.6GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2022-01-18 06:37:19,176 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 377.5MB. Free memory is still 339.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:37:19,176 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.81ms. Allocated memory is still 377.5MB. Free memory was 338.0MB in the beginning and 336.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 06:37:19,176 INFO L158 Benchmark]: Boogie Preprocessor took 20.44ms. Allocated memory is still 377.5MB. Free memory was 336.5MB in the beginning and 335.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:37:19,177 INFO L158 Benchmark]: RCFGBuilder took 301.76ms. Allocated memory is still 377.5MB. Free memory was 335.5MB in the beginning and 324.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 06:37:19,177 INFO L158 Benchmark]: TraceAbstraction took 669296.22ms. Allocated memory was 377.5MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 324.1MB in the beginning and 9.9GB in the end (delta: -9.6GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2022-01-18 06:37:19,177 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 0.13ms. Allocated memory is still 377.5MB. Free memory is still 339.3MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.81ms. Allocated memory is still 377.5MB. Free memory was 338.0MB in the beginning and 336.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.44ms. Allocated memory is still 377.5MB. Free memory was 336.5MB in the beginning and 335.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 301.76ms. Allocated memory is still 377.5MB. Free memory was 335.5MB in the beginning and 324.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 669296.22ms. Allocated memory was 377.5MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 324.1MB in the beginning and 9.9GB in the end (delta: -9.6GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (598862states) and FLOYD_HOARE automaton (currently 635 states, 54 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 55ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (598862states) and FLOYD_HOARE automaton (currently 635 states, 54 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 55ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (598862states) and FLOYD_HOARE automaton (currently 635 states, 54 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 55ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (598862states) and FLOYD_HOARE automaton (currently 635 states, 54 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 55ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 669.1s, OverallIterations: 32, TraceHistogramMax: 7, PathProgramHistogramMax: 29, EmptinessCheckTime: 8.0s, AutomataDifference: 440.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47713 SdHoareTripleChecker+Valid, 64.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47713 mSDsluCounter, 61552 SdHoareTripleChecker+Invalid, 54.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78449 mSDsCounter, 13805 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 121018 IncrementalHoareTripleChecker+Invalid, 134823 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13805 mSolverCounterUnsat, 3141 mSDtfsCounter, 121018 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9604 GetRequests, 2210 SyntacticMatches, 28 SemanticMatches, 7365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564403 ImplicationChecksByTransitivity, 320.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=598862occurred in iteration=31, InterpolantAutomatonStates: 6263, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 117.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 2540761 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 94.7s InterpolantComputationTime, 2811 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 139 NumberOfCheckSat, 4083 ConstructedInterpolants, 0 QuantifiedInterpolants, 61581 SizeOfPredicates, 409 NumberOfNonLiveVariables, 3492 ConjunctsInSsa, 566 ConjunctsInUnsatCore, 88 InterpolantComputations, 4 PerfectInterpolantSequences, 964/3747 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