/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:35:59,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:35:59,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:35:59,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:35:59,925 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 [2022-01-28 15:35:59,954 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:35:59,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:35:59,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:35:59,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:35:59,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:35:59,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:35:59,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:35:59,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:35:59,956 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:35:59,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:35:59,957 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:35:59,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:35:59,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:35:59,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:35:59,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:35:59,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:35:59,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:35:59,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:35:59,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:35:59,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:35:59,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:35:59,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:35:59,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:36:00,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:36:00,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:36:00,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:36:00,215 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:36:00,216 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:36:00,217 INFO L432 ainManager$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 [2022-01-28 15:36:00,217 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2022-01-28 15:36:00,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:36:00,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:36:00,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:36:00,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:36:00,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:36:00,253 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 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,259 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 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,265 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:36:00,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:36:00,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:36:00,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:36:00,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:36:00,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:36:00,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:36:00,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:36:00,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:36:00,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/1) ... [2022-01-28 15:36:00,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:36:00,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:00,320 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) [2022-01-28 15:36:00,346 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 [2022-01-28 15:36:00,361 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:36:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:36:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:36:00,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:36:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:36:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:36:00,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:36:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:36:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:36:00,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:36:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:36:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:36:00,363 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:36:00,407 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:36:00,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:36:00,560 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:36:00,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:36:00,622 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:36:00,624 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:36:00 BoogieIcfgContainer [2022-01-28 15:36:00,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:36:00,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:36:00,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:36:00,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:36:00,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:36:00" (1/2) ... [2022-01-28 15:36:00,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8abc30 and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:36:00, skipping insertion in model container [2022-01-28 15:36:00,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:36:00" (2/2) ... [2022-01-28 15:36:00,637 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2022-01-28 15:36:00,641 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:36:00,641 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:36:00,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:36:00,641 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:36:00,698 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 15:36:00,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:36:00,795 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 [2022-01-28 15:36:00,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 15:36:00,804 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-01-28 15:36:00,877 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) [2022-01-28 15:36:00,884 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) [2022-01-28 15:36:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 15:36:00,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:00,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:36:00,905 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239154, now seen corresponding path program 1 times [2022-01-28 15:36:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:00,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751762146] [2022-01-28 15:36:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:00,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:01,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:01,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751762146] [2022-01-28 15:36:01,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751762146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:36:01,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:36:01,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:36:01,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085595075] [2022-01-28 15:36:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:36:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:36:01,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:36:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:36:01,079 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) [2022-01-28 15:36:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:01,144 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2022-01-28 15:36:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:36:01,146 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 [2022-01-28 15:36:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:01,160 INFO L225 Difference]: With dead ends: 393 [2022-01-28 15:36:01,160 INFO L226 Difference]: Without dead ends: 393 [2022-01-28 15:36:01,161 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 [2022-01-28 15:36:01,164 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 [2022-01-28 15:36:01,165 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] [2022-01-28 15:36:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-28 15:36:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-01-28 15:36:01,269 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) [2022-01-28 15:36:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2022-01-28 15:36:01,273 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2022-01-28 15:36:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:01,274 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2022-01-28 15:36:01,274 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) [2022-01-28 15:36:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2022-01-28 15:36:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:36:01,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:01,277 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] [2022-01-28 15:36:01,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:36:01,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:01,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 492079791, now seen corresponding path program 1 times [2022-01-28 15:36:01,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:01,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670074843] [2022-01-28 15:36:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:01,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:01,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670074843] [2022-01-28 15:36:01,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670074843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:36:01,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:36:01,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:36:01,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330491553] [2022-01-28 15:36:01,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:36:01,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:36:01,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:36:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:36:01,337 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) [2022-01-28 15:36:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:01,380 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2022-01-28 15:36:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:36:01,383 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 [2022-01-28 15:36:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:01,386 INFO L225 Difference]: With dead ends: 442 [2022-01-28 15:36:01,386 INFO L226 Difference]: Without dead ends: 442 [2022-01-28 15:36:01,386 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 [2022-01-28 15:36:01,387 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 [2022-01-28 15:36:01,391 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] [2022-01-28 15:36:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-28 15:36:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-28 15:36:01,413 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) [2022-01-28 15:36:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2022-01-28 15:36:01,416 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2022-01-28 15:36:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2022-01-28 15:36:01,417 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) [2022-01-28 15:36:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2022-01-28 15:36:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:36:01,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:01,428 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] [2022-01-28 15:36:01,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 15:36:01,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash 806798595, now seen corresponding path program 1 times [2022-01-28 15:36:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:01,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130116078] [2022-01-28 15:36:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:01,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:36:01,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:01,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130116078] [2022-01-28 15:36:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130116078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:36:01,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:36:01,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:36:01,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575965487] [2022-01-28 15:36:01,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:36:01,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:36:01,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:36:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:36:01,482 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) [2022-01-28 15:36:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:01,516 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2022-01-28 15:36:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:36:01,517 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 [2022-01-28 15:36:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:01,521 INFO L225 Difference]: With dead ends: 880 [2022-01-28 15:36:01,521 INFO L226 Difference]: Without dead ends: 588 [2022-01-28 15:36:01,522 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 [2022-01-28 15:36:01,523 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 [2022-01-28 15:36:01,524 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] [2022-01-28 15:36:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-28 15:36:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2022-01-28 15:36:01,549 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) [2022-01-28 15:36:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2022-01-28 15:36:01,552 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2022-01-28 15:36:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:01,553 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2022-01-28 15:36:01,553 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) [2022-01-28 15:36:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2022-01-28 15:36:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:36:01,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:01,555 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] [2022-01-28 15:36:01,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:36:01,555 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1435505509, now seen corresponding path program 1 times [2022-01-28 15:36:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:01,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172856440] [2022-01-28 15:36:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:01,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:01,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172856440] [2022-01-28 15:36:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172856440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136702792] [2022-01-28 15:36:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:01,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:01,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:01,639 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) [2022-01-28 15:36:01,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:36:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:36:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:36:01,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:01,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-01-28 15:36:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:36:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:36:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136702792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:02,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:02,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-01-28 15:36:02,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701209033] [2022-01-28 15:36:02,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:02,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:36:02,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:36:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:36:02,059 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) [2022-01-28 15:36:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:02,344 INFO L93 Difference]: Finished difference Result 1649 states and 4903 transitions. [2022-01-28 15:36:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:36:02,345 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 [2022-01-28 15:36:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:02,351 INFO L225 Difference]: With dead ends: 1649 [2022-01-28 15:36:02,351 INFO L226 Difference]: Without dead ends: 1033 [2022-01-28 15:36:02,352 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 [2022-01-28 15:36:02,355 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 [2022-01-28 15:36:02,356 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] [2022-01-28 15:36:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-28 15:36:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 773. [2022-01-28 15:36:02,379 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) [2022-01-28 15:36:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2290 transitions. [2022-01-28 15:36:02,382 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2290 transitions. Word has length 28 [2022-01-28 15:36:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:02,382 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2290 transitions. [2022-01-28 15:36:02,382 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) [2022-01-28 15:36:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2290 transitions. [2022-01-28 15:36:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:36:02,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:02,385 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] [2022-01-28 15:36:02,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:02,599 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 [2022-01-28 15:36:02,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1406640581, now seen corresponding path program 2 times [2022-01-28 15:36:02,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532092672] [2022-01-28 15:36:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:02,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:02,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532092672] [2022-01-28 15:36:02,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532092672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:36:02,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:36:02,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:36:02,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303103728] [2022-01-28 15:36:02,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:36:02,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:36:02,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:36:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:36:02,650 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) [2022-01-28 15:36:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:02,680 INFO L93 Difference]: Finished difference Result 616 states and 1811 transitions. [2022-01-28 15:36:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:36:02,680 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 [2022-01-28 15:36:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:02,684 INFO L225 Difference]: With dead ends: 616 [2022-01-28 15:36:02,684 INFO L226 Difference]: Without dead ends: 616 [2022-01-28 15:36:02,687 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 [2022-01-28 15:36:02,688 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 [2022-01-28 15:36:02,688 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] [2022-01-28 15:36:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-28 15:36:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-28 15:36:02,702 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) [2022-01-28 15:36:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1811 transitions. [2022-01-28 15:36:02,704 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1811 transitions. Word has length 28 [2022-01-28 15:36:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:02,705 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1811 transitions. [2022-01-28 15:36:02,706 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) [2022-01-28 15:36:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1811 transitions. [2022-01-28 15:36:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 15:36:02,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:02,715 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] [2022-01-28 15:36:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 15:36:02,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1436964612, now seen corresponding path program 3 times [2022-01-28 15:36:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:02,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985445282] [2022-01-28 15:36:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:02,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:02,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:02,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985445282] [2022-01-28 15:36:02,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985445282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:02,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408127325] [2022-01-28 15:36:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:36:02,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:02,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:02,860 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) [2022-01-28 15:36:02,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:36:02,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:36:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:36:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:03,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-01-28 15:36:03,265 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:03,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-01-28 15:36:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:36:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:03,744 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-28 15:36:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 69 [2022-01-28 15:36:03,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-01-28 15:36:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:36:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408127325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:03,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:03,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2022-01-28 15:36:03,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041591333] [2022-01-28 15:36:03,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:03,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:36:03,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:36:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:36:03,797 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) [2022-01-28 15:36:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:05,509 INFO L93 Difference]: Finished difference Result 2902 states and 8623 transitions. [2022-01-28 15:36:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:36:05,510 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 [2022-01-28 15:36:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:05,521 INFO L225 Difference]: With dead ends: 2902 [2022-01-28 15:36:05,521 INFO L226 Difference]: Without dead ends: 1998 [2022-01-28 15:36:05,522 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 [2022-01-28 15:36:05,524 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 [2022-01-28 15:36:05,524 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] [2022-01-28 15:36:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-28 15:36:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1029. [2022-01-28 15:36:05,556 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) [2022-01-28 15:36:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3047 transitions. [2022-01-28 15:36:05,559 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3047 transitions. Word has length 35 [2022-01-28 15:36:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:05,564 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3047 transitions. [2022-01-28 15:36:05,564 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) [2022-01-28 15:36:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3047 transitions. [2022-01-28 15:36:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 15:36:05,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:05,569 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] [2022-01-28 15:36:05,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:05,789 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 [2022-01-28 15:36:05,790 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 899682228, now seen corresponding path program 4 times [2022-01-28 15:36:05,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:05,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129492125] [2022-01-28 15:36:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:05,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:05,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129492125] [2022-01-28 15:36:05,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129492125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058765830] [2022-01-28 15:36:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:36:05,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:05,852 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) [2022-01-28 15:36:05,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:36:05,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:36:05,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:36:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:05,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-28 15:36:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-01-28 15:36:06,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:36:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:06,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058765830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:06,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:06,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2022-01-28 15:36:06,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820064208] [2022-01-28 15:36:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:06,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:36:06,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:36:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:36:06,103 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) [2022-01-28 15:36:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:06,151 INFO L93 Difference]: Finished difference Result 2681 states and 7863 transitions. [2022-01-28 15:36:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:36:06,151 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 [2022-01-28 15:36:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:06,164 INFO L225 Difference]: With dead ends: 2681 [2022-01-28 15:36:06,164 INFO L226 Difference]: Without dead ends: 2651 [2022-01-28 15:36:06,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:36:06,165 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 [2022-01-28 15:36:06,165 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] [2022-01-28 15:36:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-01-28 15:36:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2233. [2022-01-28 15:36:06,226 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) [2022-01-28 15:36:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2022-01-28 15:36:06,234 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 42 [2022-01-28 15:36:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:06,234 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2022-01-28 15:36:06,234 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) [2022-01-28 15:36:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2022-01-28 15:36:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 15:36:06,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:06,240 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] [2022-01-28 15:36:06,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:06,454 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 [2022-01-28 15:36:06,454 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1081871720, now seen corresponding path program 5 times [2022-01-28 15:36:06,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967654631] [2022-01-28 15:36:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:06,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:06,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:06,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967654631] [2022-01-28 15:36:06,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967654631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:06,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099608906] [2022-01-28 15:36:06,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:36:06,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:06,804 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) [2022-01-28 15:36:06,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:36:06,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:36:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:36:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:07,171 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:07,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 98 [2022-01-28 15:36:07,639 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2022-01-28 15:36:07,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 38 [2022-01-28 15:36:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:07,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:08,115 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2022-01-28 15:36:08,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 82 [2022-01-28 15:36:08,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-01-28 15:36:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:08,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099608906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:08,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:08,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2022-01-28 15:36:08,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977917619] [2022-01-28 15:36:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:08,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:36:08,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:36:08,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:36:08,197 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:20,585 INFO L93 Difference]: Finished difference Result 23769 states and 70978 transitions. [2022-01-28 15:36:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-01-28 15:36:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 15:36:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:20,697 INFO L225 Difference]: With dead ends: 23769 [2022-01-28 15:36:20,697 INFO L226 Difference]: Without dead ends: 23366 [2022-01-28 15:36:20,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42164 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15947, Invalid=67863, Unknown=0, NotChecked=0, Total=83810 [2022-01-28 15:36:20,712 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1780 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2263 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:20,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 1554 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2398 Invalid, 0 Unknown, 2263 Unchecked, 1.7s Time] [2022-01-28 15:36:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23366 states. [2022-01-28 15:36:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23366 to 9659. [2022-01-28 15:36:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9658 states have (on average 3.1270449368399253) internal successors, (30201), 9658 states have internal predecessors, (30201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 30201 transitions. [2022-01-28 15:36:21,274 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 30201 transitions. Word has length 42 [2022-01-28 15:36:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 9659 states and 30201 transitions. [2022-01-28 15:36:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 30201 transitions. [2022-01-28 15:36:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 15:36:21,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:21,301 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] [2022-01-28 15:36:21,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:21,515 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 [2022-01-28 15:36:21,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1747615108, now seen corresponding path program 6 times [2022-01-28 15:36:21,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564407071] [2022-01-28 15:36:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:21,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:21,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564407071] [2022-01-28 15:36:21,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564407071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442365850] [2022-01-28 15:36:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:36:21,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:21,676 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) [2022-01-28 15:36:21,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:36:21,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:36:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 15:36:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:22,066 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:22,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-28 15:36:22,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:22,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:36:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:22,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:22,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:22,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 100 [2022-01-28 15:36:23,031 INFO L354 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-28 15:36:23,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 107 [2022-01-28 15:36:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:23,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442365850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:23,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:23,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 27 [2022-01-28 15:36:23,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742941347] [2022-01-28 15:36:23,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:23,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:36:23,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:36:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:36:23,213 INFO L87 Difference]: Start difference. First operand 9659 states and 30201 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:26,220 INFO L93 Difference]: Finished difference Result 30237 states and 93951 transitions. [2022-01-28 15:36:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 15:36:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 15:36:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:26,383 INFO L225 Difference]: With dead ends: 30237 [2022-01-28 15:36:26,384 INFO L226 Difference]: Without dead ends: 30094 [2022-01-28 15:36:26,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1947, Invalid=5709, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 15:36:26,386 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 913 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:26,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 640 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:36:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30094 states. [2022-01-28 15:36:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30094 to 14357. [2022-01-28 15:36:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14357 states, 14356 states have (on average 3.1825717470047366) internal successors, (45689), 14356 states have internal predecessors, (45689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14357 states to 14357 states and 45689 transitions. [2022-01-28 15:36:26,924 INFO L78 Accepts]: Start accepts. Automaton has 14357 states and 45689 transitions. Word has length 42 [2022-01-28 15:36:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:26,926 INFO L470 AbstractCegarLoop]: Abstraction has 14357 states and 45689 transitions. [2022-01-28 15:36:26,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14357 states and 45689 transitions. [2022-01-28 15:36:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 15:36:26,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:26,968 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] [2022-01-28 15:36:26,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:27,183 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 [2022-01-28 15:36:27,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 130041008, now seen corresponding path program 7 times [2022-01-28 15:36:27,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279847122] [2022-01-28 15:36:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:27,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:36:27,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279847122] [2022-01-28 15:36:27,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279847122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991990910] [2022-01-28 15:36:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:36:27,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:27,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:27,223 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) [2022-01-28 15:36:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:36:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:36:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:36:27,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:36:27,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991990910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:27,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:27,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-01-28 15:36:27,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175329711] [2022-01-28 15:36:27,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:27,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:36:27,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:36:27,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:36:27,394 INFO L87 Difference]: Start difference. First operand 14357 states and 45689 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) [2022-01-28 15:36:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:27,645 INFO L93 Difference]: Finished difference Result 31443 states and 98753 transitions. [2022-01-28 15:36:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:36:27,645 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 42 [2022-01-28 15:36:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:27,842 INFO L225 Difference]: With dead ends: 31443 [2022-01-28 15:36:27,842 INFO L226 Difference]: Without dead ends: 31401 [2022-01-28 15:36:27,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:36:27,843 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:27,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:36:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31401 states. [2022-01-28 15:36:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31401 to 27407. [2022-01-28 15:36:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27407 states, 27406 states have (on average 3.203349631467562) internal successors, (87791), 27406 states have internal predecessors, (87791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27407 states to 27407 states and 87791 transitions. [2022-01-28 15:36:28,638 INFO L78 Accepts]: Start accepts. Automaton has 27407 states and 87791 transitions. Word has length 42 [2022-01-28 15:36:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:28,638 INFO L470 AbstractCegarLoop]: Abstraction has 27407 states and 87791 transitions. [2022-01-28 15:36:28,638 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) [2022-01-28 15:36:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27407 states and 87791 transitions. [2022-01-28 15:36:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-28 15:36:28,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:28,897 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] [2022-01-28 15:36:28,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:29,099 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 [2022-01-28 15:36:29,099 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash 313696692, now seen corresponding path program 8 times [2022-01-28 15:36:29,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828985488] [2022-01-28 15:36:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:29,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:29,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828985488] [2022-01-28 15:36:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828985488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249528349] [2022-01-28 15:36:29,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:36:29,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:29,269 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) [2022-01-28 15:36:29,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:36:29,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:36:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:36:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:29,413 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:29,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:36:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:29,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:29,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-01-28 15:36:29,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:29,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 98 [2022-01-28 15:36:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:29,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249528349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:29,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:29,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-28 15:36:29,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730049013] [2022-01-28 15:36:29,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:29,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:36:29,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:36:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:36:29,739 INFO L87 Difference]: Start difference. First operand 27407 states and 87791 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:30,278 INFO L93 Difference]: Finished difference Result 43937 states and 140446 transitions. [2022-01-28 15:36:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:36:30,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-28 15:36:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:30,527 INFO L225 Difference]: With dead ends: 43937 [2022-01-28 15:36:30,527 INFO L226 Difference]: Without dead ends: 43937 [2022-01-28 15:36:30,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:36:30,528 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 322 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:30,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 273 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:36:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43937 states. [2022-01-28 15:36:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43937 to 23166. [2022-01-28 15:36:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23166 states, 23165 states have (on average 3.224649255342111) internal successors, (74699), 23165 states have internal predecessors, (74699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23166 states to 23166 states and 74699 transitions. [2022-01-28 15:36:31,193 INFO L78 Accepts]: Start accepts. Automaton has 23166 states and 74699 transitions. Word has length 44 [2022-01-28 15:36:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:31,193 INFO L470 AbstractCegarLoop]: Abstraction has 23166 states and 74699 transitions. [2022-01-28 15:36:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 23166 states and 74699 transitions. [2022-01-28 15:36:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-28 15:36:31,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:31,247 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] [2022-01-28 15:36:31,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-28 15:36:31,554 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 [2022-01-28 15:36:31,554 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1826631187, now seen corresponding path program 9 times [2022-01-28 15:36:31,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:31,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376127385] [2022-01-28 15:36:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:31,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:36:31,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376127385] [2022-01-28 15:36:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376127385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161495195] [2022-01-28 15:36:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:36:31,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:31,843 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) [2022-01-28 15:36:31,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:36:31,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:36:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-28 15:36:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:32,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:36:32,455 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-28 15:36:32,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 102 [2022-01-28 15:36:32,460 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-01-28 15:36:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:36:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:33,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:33,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:36:33,500 INFO L354 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-01-28 15:36:33,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 143 [2022-01-28 15:36:33,523 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:36:33,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 121 [2022-01-28 15:36:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:36:33,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161495195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:33,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:33,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2022-01-28 15:36:33,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700370002] [2022-01-28 15:36:33,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:33,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:36:33,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:36:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:36:33,775 INFO L87 Difference]: Start difference. First operand 23166 states and 74699 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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) [2022-01-28 15:36:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:36,967 INFO L93 Difference]: Finished difference Result 42961 states and 135800 transitions. [2022-01-28 15:36:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 15:36:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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 47 [2022-01-28 15:36:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:37,050 INFO L225 Difference]: With dead ends: 42961 [2022-01-28 15:36:37,051 INFO L226 Difference]: Without dead ends: 31764 [2022-01-28 15:36:37,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1550, Invalid=5422, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:36:37,052 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1078 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:37,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 906 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:36:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31764 states. [2022-01-28 15:36:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31764 to 22131. [2022-01-28 15:36:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22131 states, 22130 states have (on average 3.154134658834162) internal successors, (69801), 22130 states have internal predecessors, (69801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22131 states to 22131 states and 69801 transitions. [2022-01-28 15:36:37,675 INFO L78 Accepts]: Start accepts. Automaton has 22131 states and 69801 transitions. Word has length 47 [2022-01-28 15:36:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:37,675 INFO L470 AbstractCegarLoop]: Abstraction has 22131 states and 69801 transitions. [2022-01-28 15:36:37,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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) [2022-01-28 15:36:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22131 states and 69801 transitions. [2022-01-28 15:36:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:36:37,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:37,720 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] [2022-01-28 15:36:37,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:37,935 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 [2022-01-28 15:36:37,935 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash -811163237, now seen corresponding path program 10 times [2022-01-28 15:36:37,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:37,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108393239] [2022-01-28 15:36:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:37,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108393239] [2022-01-28 15:36:37,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108393239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208323640] [2022-01-28 15:36:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:36:37,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:37,984 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) [2022-01-28 15:36:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:36:38,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:36:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:36:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:38,081 INFO L388 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 [2022-01-28 15:36:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:38,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:38,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:38,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 89 [2022-01-28 15:36:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:36:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 15:36:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208323640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:38,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:38,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-01-28 15:36:38,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417436157] [2022-01-28 15:36:38,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:36:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:36:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:36:38,335 INFO L87 Difference]: Start difference. First operand 22131 states and 69801 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) [2022-01-28 15:36:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:38,585 INFO L93 Difference]: Finished difference Result 34131 states and 106934 transitions. [2022-01-28 15:36:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 15:36:38,586 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 49 [2022-01-28 15:36:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:38,672 INFO L225 Difference]: With dead ends: 34131 [2022-01-28 15:36:38,672 INFO L226 Difference]: Without dead ends: 34062 [2022-01-28 15:36:38,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:36:38,673 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:38,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 161 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:36:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34062 states. [2022-01-28 15:36:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34062 to 31586. [2022-01-28 15:36:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31586 states, 31585 states have (on average 3.1710938736742125) internal successors, (100159), 31585 states have internal predecessors, (100159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31586 states to 31586 states and 100159 transitions. [2022-01-28 15:36:39,605 INFO L78 Accepts]: Start accepts. Automaton has 31586 states and 100159 transitions. Word has length 49 [2022-01-28 15:36:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 31586 states and 100159 transitions. [2022-01-28 15:36:39,605 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) [2022-01-28 15:36:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 31586 states and 100159 transitions. [2022-01-28 15:36:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:36:39,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:39,674 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] [2022-01-28 15:36:39,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:39,876 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 [2022-01-28 15:36:39,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 567985861, now seen corresponding path program 11 times [2022-01-28 15:36:39,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:39,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201227876] [2022-01-28 15:36:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:39,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:40,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201227876] [2022-01-28 15:36:40,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201227876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178125669] [2022-01-28 15:36:40,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:36:40,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:40,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:40,035 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) [2022-01-28 15:36:40,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:36:40,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-28 15:36:40,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:40,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 15:36:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:40,246 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:36:40,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:36:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:40,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:40,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:40,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:36:40,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 104 [2022-01-28 15:36:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:36:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178125669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:40,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:36:40,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522915954] [2022-01-28 15:36:40,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:40,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:36:40,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:36:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:36:40,930 INFO L87 Difference]: Start difference. First operand 31586 states and 100159 transitions. Second operand has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:44,933 INFO L93 Difference]: Finished difference Result 54662 states and 169333 transitions. [2022-01-28 15:36:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-28 15:36:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:36:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:45,093 INFO L225 Difference]: With dead ends: 54662 [2022-01-28 15:36:45,093 INFO L226 Difference]: Without dead ends: 51064 [2022-01-28 15:36:45,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7814 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2366, Invalid=18514, Unknown=0, NotChecked=0, Total=20880 [2022-01-28 15:36:45,095 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1176 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:45,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 1731 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 15:36:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51064 states. [2022-01-28 15:36:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51064 to 37053. [2022-01-28 15:36:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37053 states, 37052 states have (on average 3.158210083126417) internal successors, (117018), 37052 states have internal predecessors, (117018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37053 states to 37053 states and 117018 transitions. [2022-01-28 15:36:45,958 INFO L78 Accepts]: Start accepts. Automaton has 37053 states and 117018 transitions. Word has length 49 [2022-01-28 15:36:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:45,958 INFO L470 AbstractCegarLoop]: Abstraction has 37053 states and 117018 transitions. [2022-01-28 15:36:45,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37053 states and 117018 transitions. [2022-01-28 15:36:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:36:46,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:46,016 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] [2022-01-28 15:36:46,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:46,216 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 [2022-01-28 15:36:46,217 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash -881482185, now seen corresponding path program 12 times [2022-01-28 15:36:46,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097984319] [2022-01-28 15:36:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:46,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097984319] [2022-01-28 15:36:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097984319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815747478] [2022-01-28 15:36:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:36:46,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:46,368 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) [2022-01-28 15:36:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:36:46,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:36:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 15:36:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:46,612 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:36:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:36:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:46,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:46,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:46,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-28 15:36:46,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 104 [2022-01-28 15:36:46,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:36:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:47,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815747478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:47,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:47,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-01-28 15:36:47,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945446378] [2022-01-28 15:36:47,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:47,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:36:47,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:36:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:36:47,320 INFO L87 Difference]: Start difference. First operand 37053 states and 117018 transitions. Second operand has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:53,211 INFO L93 Difference]: Finished difference Result 142316 states and 438987 transitions. [2022-01-28 15:36:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-28 15:36:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:36:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:53,852 INFO L225 Difference]: With dead ends: 142316 [2022-01-28 15:36:53,852 INFO L226 Difference]: Without dead ends: 142316 [2022-01-28 15:36:53,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11519 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4341, Invalid=24051, Unknown=0, NotChecked=0, Total=28392 [2022-01-28 15:36:53,854 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1048 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 5789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:53,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 942 Invalid, 5789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-28 15:36:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142316 states. [2022-01-28 15:36:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142316 to 58664. [2022-01-28 15:36:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58664 states, 58663 states have (on average 3.1185244532328724) internal successors, (182942), 58663 states have internal predecessors, (182942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58664 states to 58664 states and 182942 transitions. [2022-01-28 15:36:56,111 INFO L78 Accepts]: Start accepts. Automaton has 58664 states and 182942 transitions. Word has length 49 [2022-01-28 15:36:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:56,111 INFO L470 AbstractCegarLoop]: Abstraction has 58664 states and 182942 transitions. [2022-01-28 15:36:56,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 58664 states and 182942 transitions. [2022-01-28 15:36:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:36:56,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:56,215 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] [2022-01-28 15:36:56,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:56,415 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 [2022-01-28 15:36:56,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -689445405, now seen corresponding path program 13 times [2022-01-28 15:36:56,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581448191] [2022-01-28 15:36:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:56,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:56,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581448191] [2022-01-28 15:36:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581448191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446726313] [2022-01-28 15:36:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:36:56,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:56,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:56,675 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) [2022-01-28 15:36:56,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:36:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:56,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:36:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:56,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:36:56,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:36:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:57,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:57,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:57,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:36:57,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-01-28 15:36:57,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:57,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 102 [2022-01-28 15:36:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:57,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446726313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:57,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:57,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-28 15:36:57,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828955370] [2022-01-28 15:36:57,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:57,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:36:57,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:36:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:36:57,645 INFO L87 Difference]: Start difference. First operand 58664 states and 182942 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:37:09,058 INFO L93 Difference]: Finished difference Result 198398 states and 609623 transitions. [2022-01-28 15:37:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2022-01-28 15:37:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:37:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:37:10,009 INFO L225 Difference]: With dead ends: 198398 [2022-01-28 15:37:10,010 INFO L226 Difference]: Without dead ends: 197982 [2022-01-28 15:37:10,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46421 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9283, Invalid=96017, Unknown=0, NotChecked=0, Total=105300 [2022-01-28 15:37:10,014 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1063 mSDsluCounter, 5851 mSDsCounter, 0 mSdLazyCounter, 5656 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 5905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 5656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:37:10,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 4750 Invalid, 5905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 5656 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-28 15:37:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197982 states. [2022-01-28 15:37:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197982 to 82224. [2022-01-28 15:37:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82224 states, 82223 states have (on average 3.1374432944553226) internal successors, (257970), 82223 states have internal predecessors, (257970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82224 states to 82224 states and 257970 transitions. [2022-01-28 15:37:13,412 INFO L78 Accepts]: Start accepts. Automaton has 82224 states and 257970 transitions. Word has length 49 [2022-01-28 15:37:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:37:13,412 INFO L470 AbstractCegarLoop]: Abstraction has 82224 states and 257970 transitions. [2022-01-28 15:37:13,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 82224 states and 257970 transitions. [2022-01-28 15:37:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:37:13,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:37:13,581 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] [2022-01-28 15:37:13,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:37:13,787 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 [2022-01-28 15:37:13,787 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:37:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:37:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -987527863, now seen corresponding path program 14 times [2022-01-28 15:37:13,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:37:13,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641890556] [2022-01-28 15:37:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:37:13,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:37:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:14,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:37:14,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641890556] [2022-01-28 15:37:14,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641890556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:37:14,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445903735] [2022-01-28 15:37:14,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:37:14,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:37:14,041 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) [2022-01-28 15:37:14,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:37:14,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:37:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:37:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:37:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:37:14,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 15:37:15,604 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:37:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 131 [2022-01-28 15:37:15,612 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-28 15:37:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 101 [2022-01-28 15:37:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:15,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:37:17,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:37:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 15:37:17,516 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-01-28 15:37:17,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 172 [2022-01-28 15:37:17,544 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-01-28 15:37:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 171 [2022-01-28 15:37:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:18,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445903735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:37:18,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:37:18,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-01-28 15:37:18,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370487738] [2022-01-28 15:37:18,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:37:18,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-28 15:37:18,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:37:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-28 15:37:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 15:37:18,002 INFO L87 Difference]: Start difference. First operand 82224 states and 257970 transitions. Second operand has 41 states, 41 states have (on average 3.1707317073170733) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:38:00,521 INFO L93 Difference]: Finished difference Result 233423 states and 716298 transitions. [2022-01-28 15:38:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2022-01-28 15:38:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1707317073170733) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-28 15:38:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:38:01,394 INFO L225 Difference]: With dead ends: 233423 [2022-01-28 15:38:01,394 INFO L226 Difference]: Without dead ends: 223213 [2022-01-28 15:38:01,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82795 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=26305, Invalid=154745, Unknown=0, NotChecked=0, Total=181050 [2022-01-28 15:38:01,401 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 1256 mSDsluCounter, 5053 mSDsCounter, 0 mSdLazyCounter, 6700 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 7012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 6700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:38:01,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1256 Valid, 4139 Invalid, 7012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 6700 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-28 15:38:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223213 states. [2022-01-28 15:38:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223213 to 92484. [2022-01-28 15:38:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92484 states, 92483 states have (on average 3.1321972686872184) internal successors, (289675), 92483 states have internal predecessors, (289675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92484 states to 92484 states and 289675 transitions. [2022-01-28 15:38:05,354 INFO L78 Accepts]: Start accepts. Automaton has 92484 states and 289675 transitions. Word has length 49 [2022-01-28 15:38:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:38:05,354 INFO L470 AbstractCegarLoop]: Abstraction has 92484 states and 289675 transitions. [2022-01-28 15:38:05,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1707317073170733) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 92484 states and 289675 transitions. [2022-01-28 15:38:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:38:05,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:38:05,816 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] [2022-01-28 15:38:05,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-28 15:38:06,021 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 [2022-01-28 15:38:06,022 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:38:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:38:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1791347757, now seen corresponding path program 15 times [2022-01-28 15:38:06,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:38:06,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534280931] [2022-01-28 15:38:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:38:06,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:38:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:38:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:38:06,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:38:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534280931] [2022-01-28 15:38:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534280931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:38:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518636518] [2022-01-28 15:38:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:38:06,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:38:06,203 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) [2022-01-28 15:38:06,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:38:06,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-28 15:38:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:38:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 15:38:06,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:38:06,435 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:38:06,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-28 15:38:06,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:38:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:38:06,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:38:06,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:06,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-28 15:38:07,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:07,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 110 [2022-01-28 15:38:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:38:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:38:07,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518636518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:38:07,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:38:07,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-01-28 15:38:07,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030021605] [2022-01-28 15:38:07,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:38:07,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:38:07,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:38:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:38:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:38:07,252 INFO L87 Difference]: Start difference. First operand 92484 states and 289675 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:38:14,626 INFO L93 Difference]: Finished difference Result 243277 states and 751721 transitions. [2022-01-28 15:38:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-28 15:38:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:38:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:38:15,845 INFO L225 Difference]: With dead ends: 243277 [2022-01-28 15:38:15,845 INFO L226 Difference]: Without dead ends: 243277 [2022-01-28 15:38:15,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11254 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3712, Invalid=24344, Unknown=0, NotChecked=0, Total=28056 [2022-01-28 15:38:15,846 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1223 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 4016 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 4481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 4016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:38:15,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 920 Invalid, 4481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 4016 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-28 15:38:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243277 states. [2022-01-28 15:38:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243277 to 93244. [2022-01-28 15:38:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93244 states, 93243 states have (on average 3.1219930718659845) internal successors, (291104), 93243 states have internal predecessors, (291104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93244 states to 93244 states and 291104 transitions. [2022-01-28 15:38:20,370 INFO L78 Accepts]: Start accepts. Automaton has 93244 states and 291104 transitions. Word has length 49 [2022-01-28 15:38:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:38:20,370 INFO L470 AbstractCegarLoop]: Abstraction has 93244 states and 291104 transitions. [2022-01-28 15:38:20,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 93244 states and 291104 transitions. [2022-01-28 15:38:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-28 15:38:20,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:38:20,750 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] [2022-01-28 15:38:20,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 15:38:20,973 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 [2022-01-28 15:38:20,974 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:38:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:38:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2028391905, now seen corresponding path program 16 times [2022-01-28 15:38:20,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:38:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275444210] [2022-01-28 15:38:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:38:20,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:38:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:38:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:21,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:38:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275444210] [2022-01-28 15:38:21,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275444210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:38:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233532678] [2022-01-28 15:38:21,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:38:21,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:38:21,554 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) [2022-01-28 15:38:21,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:38:21,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:38:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:38:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:38:21,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:38:21,924 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:38:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:38:22,017 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:38:22,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-28 15:38:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:38:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:38:22,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:38:22,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-28 15:38:22,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-01-28 15:38:22,736 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:38:22,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 125 [2022-01-28 15:38:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:38:23,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233532678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:38:23,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:38:23,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 37 [2022-01-28 15:38:23,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371909479] [2022-01-28 15:38:23,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:38:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-28 15:38:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:38:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-28 15:38:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:38:23,108 INFO L87 Difference]: Start difference. First operand 93244 states and 291104 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:38:43,309 INFO L93 Difference]: Finished difference Result 271029 states and 831976 transitions. [2022-01-28 15:38:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-01-28 15:38:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:38:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:38:44,272 INFO L225 Difference]: With dead ends: 271029 [2022-01-28 15:38:44,273 INFO L226 Difference]: Without dead ends: 270337 [2022-01-28 15:38:44,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48616 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12264, Invalid=99626, Unknown=0, NotChecked=0, Total=111890 [2022-01-28 15:38:44,277 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1831 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 5027 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 5605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 5027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:38:44,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1831 Valid, 1560 Invalid, 5605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 5027 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-28 15:38:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270337 states. [2022-01-28 15:38:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270337 to 99428. [2022-01-28 15:38:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99428 states, 99427 states have (on average 3.1247246723726954) internal successors, (310682), 99427 states have internal predecessors, (310682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99428 states to 99428 states and 310682 transitions. [2022-01-28 15:38:49,041 INFO L78 Accepts]: Start accepts. Automaton has 99428 states and 310682 transitions. Word has length 49 [2022-01-28 15:38:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:38:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 99428 states and 310682 transitions. [2022-01-28 15:38:49,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 99428 states and 310682 transitions. [2022-01-28 15:38:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:38:49,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:38:49,217 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:38:49,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 15:38:49,418 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 [2022-01-28 15:38:49,418 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:38:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:38:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1698539233, now seen corresponding path program 17 times [2022-01-28 15:38:49,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:38:49,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13845385] [2022-01-28 15:38:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:38:49,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:38:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:38:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:38:49,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:38:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13845385] [2022-01-28 15:38:49,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13845385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:38:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970936628] [2022-01-28 15:38:49,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:38:49,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:38:49,583 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) [2022-01-28 15:38:49,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:38:49,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 15:38:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:38:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 15:38:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:38:49,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2022-01-28 15:38:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:49,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:49,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-28 15:38:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:38:50,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:38:50,665 INFO L354 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-28 15:38:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 96 [2022-01-28 15:38:50,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:38:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:38:50,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970936628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:38:50,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:38:50,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-01-28 15:38:50,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655134678] [2022-01-28 15:38:50,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:38:50,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:38:50,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:38:50,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:38:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:38:50,742 INFO L87 Difference]: Start difference. First operand 99428 states and 310682 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 25 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) [2022-01-28 15:38:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:38:54,580 INFO L93 Difference]: Finished difference Result 233160 states and 724474 transitions. [2022-01-28 15:38:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-28 15:38:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 25 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 54 [2022-01-28 15:38:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:38:55,767 INFO L225 Difference]: With dead ends: 233160 [2022-01-28 15:38:55,768 INFO L226 Difference]: Without dead ends: 230637 [2022-01-28 15:38:55,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3513 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 15:38:55,769 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 817 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:38:55,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 929 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1028 Invalid, 0 Unknown, 404 Unchecked, 0.5s Time] [2022-01-28 15:38:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230637 states. [2022-01-28 15:38:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230637 to 151610. [2022-01-28 15:39:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151610 states, 151609 states have (on average 3.1509145235441167) internal successors, (477707), 151609 states have internal predecessors, (477707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151610 states to 151610 states and 477707 transitions. [2022-01-28 15:39:01,078 INFO L78 Accepts]: Start accepts. Automaton has 151610 states and 477707 transitions. Word has length 54 [2022-01-28 15:39:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:01,078 INFO L470 AbstractCegarLoop]: Abstraction has 151610 states and 477707 transitions. [2022-01-28 15:39:01,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 25 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) [2022-01-28 15:39:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 151610 states and 477707 transitions. [2022-01-28 15:39:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:39:01,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:01,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:39:01,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:01,978 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 [2022-01-28 15:39:01,979 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1135381657, now seen corresponding path program 18 times [2022-01-28 15:39:01,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:01,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411284948] [2022-01-28 15:39:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:01,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:02,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411284948] [2022-01-28 15:39:02,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411284948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997298460] [2022-01-28 15:39:02,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:02,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:02,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:02,162 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) [2022-01-28 15:39:02,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:39:02,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 15:39:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:02,903 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-28 15:39:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 55 [2022-01-28 15:39:02,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-28 15:39:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:03,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:04,175 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-01-28 15:39:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 162 [2022-01-28 15:39:04,192 INFO L354 Elim1Store]: treesize reduction 57, result has 6.6 percent of original size [2022-01-28 15:39:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 140 [2022-01-28 15:39:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997298460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:04,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:04,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:39:04,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60521948] [2022-01-28 15:39:04,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:04,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:39:04,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:39:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:39:04,355 INFO L87 Difference]: Start difference. First operand 151610 states and 477707 transitions. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:09,455 INFO L93 Difference]: Finished difference Result 257451 states and 800938 transitions. [2022-01-28 15:39:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-28 15:39:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-28 15:39:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:10,394 INFO L225 Difference]: With dead ends: 257451 [2022-01-28 15:39:10,394 INFO L226 Difference]: Without dead ends: 254625 [2022-01-28 15:39:10,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2180, Invalid=6010, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:39:10,395 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 768 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:10,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1947 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:39:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254625 states. [2022-01-28 15:39:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254625 to 178950. [2022-01-28 15:39:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178950 states, 178949 states have (on average 3.154898881804313) internal successors, (564566), 178949 states have internal predecessors, (564566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178950 states to 178950 states and 564566 transitions. [2022-01-28 15:39:16,636 INFO L78 Accepts]: Start accepts. Automaton has 178950 states and 564566 transitions. Word has length 54 [2022-01-28 15:39:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 178950 states and 564566 transitions. [2022-01-28 15:39:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 178950 states and 564566 transitions. [2022-01-28 15:39:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:39:17,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:17,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:39:17,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-28 15:39:17,625 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 [2022-01-28 15:39:17,625 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash -647757117, now seen corresponding path program 19 times [2022-01-28 15:39:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237348454] [2022-01-28 15:39:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:17,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:17,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237348454] [2022-01-28 15:39:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237348454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721648996] [2022-01-28 15:39:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:39:17,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:17,878 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) [2022-01-28 15:39:17,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:39:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:39:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:18,560 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:39:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-01-28 15:39:18,731 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-28 15:39:18,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-28 15:39:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:18,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:19,932 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-01-28 15:39:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 149 [2022-01-28 15:39:19,966 INFO L354 Elim1Store]: treesize reduction 72, result has 31.4 percent of original size [2022-01-28 15:39:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 158 [2022-01-28 15:39:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721648996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:20,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:20,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 34 [2022-01-28 15:39:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305345357] [2022-01-28 15:39:20,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:20,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:39:20,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:39:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:39:20,206 INFO L87 Difference]: Start difference. First operand 178950 states and 564566 transitions. Second operand has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:24,851 INFO L93 Difference]: Finished difference Result 214341 states and 670036 transitions. [2022-01-28 15:39:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-28 15:39:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-28 15:39:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:25,690 INFO L225 Difference]: With dead ends: 214341 [2022-01-28 15:39:25,691 INFO L226 Difference]: Without dead ends: 214090 [2022-01-28 15:39:25,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1503, Invalid=7239, Unknown=0, NotChecked=0, Total=8742 [2022-01-28 15:39:25,692 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1278 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:25,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1031 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:39:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214090 states. [2022-01-28 15:39:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214090 to 179054. [2022-01-28 15:39:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179054 states, 179053 states have (on average 3.1535299604027855) internal successors, (564649), 179053 states have internal predecessors, (564649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179054 states to 179054 states and 564649 transitions. [2022-01-28 15:39:31,618 INFO L78 Accepts]: Start accepts. Automaton has 179054 states and 564649 transitions. Word has length 54 [2022-01-28 15:39:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:31,618 INFO L470 AbstractCegarLoop]: Abstraction has 179054 states and 564649 transitions. [2022-01-28 15:39:31,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 179054 states and 564649 transitions. [2022-01-28 15:39:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:39:32,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:32,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:39:32,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:32,804 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 [2022-01-28 15:39:32,804 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1393501675, now seen corresponding path program 20 times [2022-01-28 15:39:32,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865399993] [2022-01-28 15:39:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:32,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:33,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865399993] [2022-01-28 15:39:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865399993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510742563] [2022-01-28 15:39:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:33,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:33,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:33,144 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) [2022-01-28 15:39:33,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:39:33,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:33,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:33,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:33,824 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:39:33,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 77 [2022-01-28 15:39:33,950 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-28 15:39:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 35 [2022-01-28 15:39:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:34,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:34,955 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2022-01-28 15:39:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 106 [2022-01-28 15:39:34,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-01-28 15:39:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:35,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510742563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:35,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:35,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-01-28 15:39:35,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531495898] [2022-01-28 15:39:35,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:35,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:39:35,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:39:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:39:35,149 INFO L87 Difference]: Start difference. First operand 179054 states and 564649 transitions. Second operand has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:44,672 INFO L93 Difference]: Finished difference Result 341622 states and 1056223 transitions. [2022-01-28 15:39:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-28 15:39:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-28 15:39:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:46,338 INFO L225 Difference]: With dead ends: 341622 [2022-01-28 15:39:46,338 INFO L226 Difference]: Without dead ends: 341622 [2022-01-28 15:39:46,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12293 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4924, Invalid=24832, Unknown=0, NotChecked=0, Total=29756 [2022-01-28 15:39:46,339 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2511 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:46,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 1576 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:39:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341622 states. [2022-01-28 15:39:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341622 to 201470. [2022-01-28 15:39:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201470 states, 201469 states have (on average 3.15822285314366) internal successors, (636284), 201469 states have internal predecessors, (636284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201470 states to 201470 states and 636284 transitions. [2022-01-28 15:39:54,261 INFO L78 Accepts]: Start accepts. Automaton has 201470 states and 636284 transitions. Word has length 54 [2022-01-28 15:39:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:54,261 INFO L470 AbstractCegarLoop]: Abstraction has 201470 states and 636284 transitions. [2022-01-28 15:39:54,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 201470 states and 636284 transitions. [2022-01-28 15:39:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:39:55,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:55,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:39:55,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:55,358 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 [2022-01-28 15:39:55,358 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1849406623, now seen corresponding path program 21 times [2022-01-28 15:39:55,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:55,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71581778] [2022-01-28 15:39:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:55,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:55,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71581778] [2022-01-28 15:39:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71581778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085242330] [2022-01-28 15:39:55,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:55,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:55,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:55,580 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) [2022-01-28 15:39:55,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:39:55,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-28 15:39:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:39:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:56,211 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:39:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-01-28 15:39:56,357 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-28 15:39:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 42 [2022-01-28 15:39:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:56,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:57,707 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-01-28 15:39:57,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 149 [2022-01-28 15:39:57,749 INFO L354 Elim1Store]: treesize reduction 72, result has 31.4 percent of original size [2022-01-28 15:39:57,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 158 [2022-01-28 15:39:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:57,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085242330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:57,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:57,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-01-28 15:39:57,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899207484] [2022-01-28 15:39:57,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:57,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:39:57,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:39:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:39:57,936 INFO L87 Difference]: Start difference. First operand 201470 states and 636284 transitions. Second operand has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 33 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:05,603 INFO L93 Difference]: Finished difference Result 244966 states and 766801 transitions. [2022-01-28 15:40:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-28 15:40:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 33 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-28 15:40:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:06,896 INFO L225 Difference]: With dead ends: 244966 [2022-01-28 15:40:06,896 INFO L226 Difference]: Without dead ends: 244715 [2022-01-28 15:40:06,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5713 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2669, Invalid=12583, Unknown=0, NotChecked=0, Total=15252 [2022-01-28 15:40:06,897 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1959 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:06,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 1164 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:40:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244715 states. [2022-01-28 15:40:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244715 to 202078. [2022-01-28 15:40:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202078 states, 202077 states have (on average 3.1605576092281655) internal successors, (638676), 202077 states have internal predecessors, (638676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202078 states to 202078 states and 638676 transitions. [2022-01-28 15:40:13,710 INFO L78 Accepts]: Start accepts. Automaton has 202078 states and 638676 transitions. Word has length 54 [2022-01-28 15:40:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:13,710 INFO L470 AbstractCegarLoop]: Abstraction has 202078 states and 638676 transitions. [2022-01-28 15:40:13,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 33 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 202078 states and 638676 transitions. [2022-01-28 15:40:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-28 15:40:14,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:14,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-28 15:40:14,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:14,698 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 [2022-01-28 15:40:14,698 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash -328735311, now seen corresponding path program 22 times [2022-01-28 15:40:14,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:14,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909728471] [2022-01-28 15:40:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:14,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:15,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909728471] [2022-01-28 15:40:15,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909728471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514368296] [2022-01-28 15:40:15,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:15,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:15,017 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) [2022-01-28 15:40:15,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:40:15,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:40:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:40:16,716 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-28 15:40:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 119 [2022-01-28 15:40:16,735 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:40:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 101 [2022-01-28 15:40:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:17,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:18,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21